Dick Rose's slide rule list.

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Greetings from Vintage Instruments SLIDE RULES, PLANIMETERS, CALCULATORS, HYDROMETERS, BOOKS, AND RELATED ITEMS FOR SALE
This -- the October, 2000 list of slide rules, calculators, planimeters, books, etc., etc. for sale -- is the largest I have yet published. It is filled with unusual items, so you might want to look through it carefully. It includes over 1000 different items, hundreds of them first-time entries -- plus two specials. Please contact me with questions about prices or anything else. You may refer the items by their number and the October, 2000 list designation.
Special #1 Nestler Special: New in case, Nestler Multimath-Duplex rule set, including both the 5 inch and 10 inch versions, the same 28 scales on each. (See items numbered 426 and 435.) The special includes these two rules with their cases for $125, plus your choice of one of the following new Nestler rules: Elemath RS (item 396), Elemath Log Log (item 397), Darmstadt (item 428), or Electro (item 437). Nestler made some very nice rules. These would be great for personal use, collection, or as a gift.		Special #2 Free bonus rule(s) with your order of any two or more items from this list of over 1000 items. I have many rules not shown here. One or more of them will be included with your order of two or more items. The larger the order, the greater the number of free, bonus rules. The largest orders will include the more unusual rules.
I have many more items coming in regularly. So if you have any special requests, please let me know. Also, there are multiples of some items; so if you need more than one, please ask. All items come with a money-back guarantee. If you are not happy with anything, for any reason, you may return it for a refund. Discounts are available for larger orders. Thanks for your interest. Have fun.
Feel free to call : 616-323-3070 or email : rarose@prodigy.net or write: Dick Rose A2605 Ridgefield Rd. Kalamazoo, MI 49024
CONTENTS
Slide Rules Arranged alphabetically: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, R, S, T, U, W, X
Books on Slide Rules, Calculators; Catalogs	Calculators, Mechanical	Artillery Rules	Drafting and Related Equipment
Planimeters	Calculators/Selectors, Slide Rule Type	Aviation Rules/Calculators	Other Instruments

SLIDE RULES

1. Acu-Math No. 4 --- 10 inch rule. Scales: K, A [B, CI, C] D, L. White plastic. Narrow rule. Magnifying cursor. Good condition, just a few light scratches and a little dirt.

2. Acu-Math A-80 --- 5 inch rule in leather case. Scales: K, A [B, S, T, C] D, DI, and, on the other side, fraction of an inch to decimal conversions [L, C2, C1] DI, D2, D. White on magnesium. Overall, 7 1/2 inches long and 1 1/2 inches wide. Very good condition, just a little dirt and a little magnesium edge corrosion. Green leather slip case in very good condition.

3. Acu-Math 150 --- 10 inch rule in case. Scales: LL01, K, A [B, T, ST, S] D, L, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. White plastic. Good condition, a slight amount of wear and dirt. Tan leather slip case, solid, but dirty.

4. Acu-Math 400 --- 10 inch rule. Scales: S, K, A [B, CI, C] D, L, T. White plastic. Clear, plastic, frameless cursor. Marked Mannheim. Made in the U.S.A. (Several available, some with case, box, and/or instructions.)

5. Acu-Math 500 --- 10 inch rule with case, instructions, guarantee, parts list, and box. Scales: S, K, A [B, CI, C] D, L, T. Equivalents on the back. Heavy white plastic with metal end plates. Very good condition. Instruction booklet, guarantee, parts list, and slip case, all in very good condition, just minor flaws. The box is slightly scrunched and is missing the flap at one end.

6. Acu-Math 511 --- Excellent, 10 inch Mannheim Professional rule, with case, instructions, and box. Scales: S, K, A [B, CI, C] D, L, T. White laminate on magnesium alloy. Made in U.S.A. Frameless plastic cursor. Equivalents on the back of the rule. Includes, Acu-Math Self-Teaching Instruction Manual, Mannheim Type Slide Rule; tan leather case; and original box. The box has a little shelf wear. The rest is excellent. (Others available.)

7. Acu-Math 1211 --- 5 inch, narrow rule, in case. Scales: K, A [B, CI, C] D, L, and, on the other side of the slide [S, T]. White on magnesium. Plastic cursor with two hairlines -- may not be the original. Very good condition, as is the red leather slip case.

8. Acu-Math 1240 --- 5 inch rule in case. Scales: K, A [B, CI, C] D, L. White plastic. Very good condition. Blue leather slip case, marked Posey Iron Works, Lancaster, PA.

9. Acumath Mannheim Manual --- Acumath Self-Teaching Instruction Manual, Mannheim Type Slide Rule. 11-page brochure.

10. Acu-Rule 10 --- 10 inch rule in cardboard outer box, with instructions. Scales: A [B, CI, C] D, K. White paint on light-colored wood. Almost new condition. Equivalents tables on the back. Labeled Festus Mfg. Co., Festus, Mo. Looks like a Lawrence Engineering rule. Box is red, white and black, marked Acu-Rule No. 10. One box end missing. Instruction sheet, in very good condition, copyright 1938.

11. Allegheny Plastics --- 4 1/4 inch circular rule, with instructions. Scales: K, D [C, B] A [CI] L. White plastic. Decimal/fraction equivalents on the back. Marked Reco Products Div., Recony Corp. Instructions well-worn. The rule itself in very good condition.

12. American Blueprint Military Rule --- 10 inch Military Slide Rule in case. Various scales for artillery, plus CI, C, D, and A scales. White laminate on mahogany. Angle chart on the back has some worn spots, otherwise the rule is in good condition. The brown leather flip-top case is solid but worn.

13. Aristo (unusual) --- 10 inch rule in a wood, clam-shell case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [sin, sin/tg, tg]. 28 cm scale on the top beveled edge. White plastic. No actual manufacturer's label on the rule itself. The case/box is marked Aristo. (Could this be the first Aristo rule that Dennert & Pape made, after which the company changed its name to Aristo?) The wooden clam-shell box is covered in a blue cloth. The rule is in good condition. The case is in only fair condition. Very interesting set.

14. Aristo 89 --- New in box, 5 inch, with case, box, and instructions. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 13 cm scale on the top beveled edge. White plastic. Brown leather case. Both the back of the rule and the case are imprinted with Martonair. Instruction sheet. Yellow, black, red, and white external box. Everything is new. (Others, with variations, available, mostly almost-new.)

15. Aristo 99 --- New in box, 10 inch rule with case, equivalents rule, instructions(in German), and outer box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 28 mm scale on the top beveled edge, which is clear. The rest of the rule is white plastic, except for the back of the rule, which has a clear strip for viewing the scales on the back of the slide. Two-tone gray, hard plastic case with a slot for the Aristo 1364 yellow plastic equivalents rule. Instructions in German. Yellow, black, red and while outside box. Everything is new. (Others, with variations, available.)

16. Aristo 99K --- 10 inch rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 28 cm scale on the top beveled edge. White plastic. Marked: System Rietz, Dennert & Pape, Hamburg-Altona. Good condition. (Another available.)

17. Aristo 109 --- 20 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S+T, T]. 50 cm scale on the tope beveled edge. 1:25 scale on the bottom edge. White plastic. Two cursors - one metal-framed, 1 5/8 inches wide, and one 3 inches wide. Marked with equivalents and Dennert & Pape, Hamburg on the back. Two-piece, gray slide case. Everything in very good condition.

18. Aristo 109 --- 20 inch rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S+T, T]. 50 cm scale on the tope beveled edge. 1:25 scale on the bottom edge. White plastic. 3 inch wide cursor. In the slide well, marked Dennert & Pape, Hamburg-Altona. Some dirt, chips, and cracks, but an OK example.

19. Aristo 803 --- 5 inch rule. Scales: L, K, A [B, CI, C] D, S, ST, T. White plastic with yellow highlighted scales. Excellent condition. (Another available.)

20. Aristo 810 --- New in box, 4 inch Puck rule with case, instructions, and outer box. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 cm scale on the top beveled edge. Rule is less than 1 inch wide. White plastic. Instructions and guarantee, in German. Yellow outer box. Everything new.

21. Aristo 812 --- 5 inch Simplex rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 13 cm scale on the top beveled edge. Marked Igema on the back. Brown leather slip case. Very good condition.

22. Aristo 815, Elektro --- New in box, 5 inch Elektro rule with case, instructions (in German) and box. Scales: K, A [B, BI, CI, C] D, D/M(=), V, and, on the back of the slide, [S, ST, L, T]. 15 cm scale on the top beveled edge. Additional inch scale on the bottom beveled edge. Both edges are clear plastic as in the back strip though which to read the scales on the back of the slide. The rest of the rule is white plastic. Brown leather slip case. Yellow, black, red, and white outer box. Instructions in German. Everything is new. (Others, new and used, available.)

23. Aristo 845 --- New in box, 5 inch Commerz rule, with case, magnifying cursor, instructions, and outer box. Scales: KZ [T2, P, T1] Z, M, and, on the back of the slide, [British Pounds, s./d.]. 13 cm scale on the top beveled edge. White plastic. Marked DEHYDAG on the back. Magnifying cursor. Instructions in German. Brown leather case. Outer box is worn. Everything else is new.

24. Aristo 867 --- New in box, 5 inch Darmstadt rule in brown leather slip case, instructions, and outer box. Scales: K, A [B, BI, CI, C] D, P, S, T, and, on the back of the slide, [L, LL1, LL2, LL3]. 15 cm scale on top beveled. White plastic. Brown leather case. Instructions in German. Yellow outer box. Everything new.

25. Aristo 867 U --- Excellent 5 inch rule in brown leather slip case, with instructions and box. Scales: K, A [B, BI, CI, C] D, P, S, T, and, on the back of the slide, [L, LL1, LL2, LL3]. 15 cm scale on one beveled edge and 6 inch scale on the other beveled edge. White plastic with clear plastic on the edges and center of the back. Marked, Made in Germany, Aristo-Darmstadt. Serial # 5814. Excellent condition. The brown leather case, marked Aristo, Made in Germany, like new. Instruction sheet. Outer box has some marks and wear, but the rule and case are excellent. (Others available.)

26. Aristo 868 --- New in box, 5 inch, Aristo-Studio rule with duplex magnifying cursor, in case with instructions and outer box. Scales: LL01, LL02, LL03, A [B, L, K, C] D, LL3, LL2, LL1, and, on the other side, ST, T1, T2, DF [CF, CIF, CI, C] D, P, S. White plastic with yellow highlighted scales. Duplex magnifying cursor. 35-page manual in German, copyright 1954. Brown leather slip case. Yellow, black, red, and white outer box. Everything new. (Others, new and used, available.)

27. Aristo 869 --- New in box, 5 inch Aristo StudioLog, with case, instructions, papers, and box. Scales: LL00, LL01, LL02, LL03, A [B, BI, K, L, C] D, LL3, LL2, LL1, LL0, and, on the other side, [ST, T1, T2, DF [CF, CIF, S, CI, C] D, DI, P, S. White plastic with yellow scale highlights. Instructions in Spanish. Small papers. Beautiful brown leather slip case. Standard Aristo yellow outer box. Everything new.

28. Aristo 870E --- New in box, 5 inch Aristo-Multilog, leather case, instructions, and box. Scales: LL00, K, A [B, T, ST, S, C] D, DI, LL0, and, on the other side, LL01, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2, LL1. Marked: Aristo Nr. 870, Made in Germany. White plastic. Brown leather slip case. 31-page instruction manual. Yellow outer box. Everything is new.

29. Aristo 890 --- New, 5 inch rule, Aristo Reitz. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. White plastic. Marked, Rockwell Valves International Inc. on the back. Brown leather slip case. Everything is new.

30. Aristo 0901 --- New in box, 10 inch Aristo-Junior rule, with case and instructions. Scales: DF [CF, CIF, CI, C] D, A, K. White plastic with some scales yellow-highlighted. Red and white, hard plastic case. Yellow, black, and white outer box. Instructions in German. Everything new. (Others, new and used, available.)

31. Aristo 0903 --- Almost new 10 inch Aristo-Scholar, slide box. Scales: L, K, A [B, CI, C] D, S, ST, T. On the back, a 25 cm scale and a 10 inch scale. White plastic with some scales yellow-highlighted. Like new. Case/box, gray, marked Aristo Scholar LL, is taped at both ends. (Others, with scale variations, available.)

32. Aristo 0903LL --- New in box, 10 inch Aristo-Scholar LL, hard plastic slide case, instructions, outer box. Scales: L, K, A [B, BI, CI, C] D, S, ST, T, and, on the back of the slide, [S, LL1, LL2, LL3]. White plastic with some scales yellow-highlighted. New. Red and white hard plastic slide case, marked Aristo. Yellow, black, white, and red outer box. Instructions, copyright 1957, are in a Germanic language (not German). A brand new, beautiful set. (Others, new and used, with scale variations, available.)

33. Aristo 0903 VS --- New in case, 10 inch Aristo 0903 VS, hard plastic slide case, and instructions. Scales: L, K, A [B, CI, C] D, S, ST, T, and, on the back, DF [CF, C] D]. Also on the back, 25 cm scale, and a 1/20 inch, 1/32 inch scale. White plastic with some scales yellow-highlighted. New. Red and white hard plastic slide case. 23-page instructions in German, copyright 1957. Everything new. (Others, new and used, available.)

34. Aristo 0903 VS-2 --- New in box, 10 inch Aristo 0903 VS-2, hard plastic slide case, instructions, outer box. Scales: L, K, A [B, CI, C] D, S, ST, T, and, on the back, DF [CF, C] D]. Also on the back, 25 cm scale, and a 1/20 inch, 1/32 inch scale. White plastic with some scales yellow-highlighted. New. Red and white hard plastic slide case, marked Aristo. Yellow, black, white, and red outer box. 23-page instructions, copyright 1958. Everything new. (Others, new and used, available.)

35. Aristo 0905 --- 10 inch Schul-Commerz rule in case. Scales: KZ [T2, P, T1] Z, M, British Pounds, s/d. 25 cm and 10 inch scales on the back. White plastic with yellow scale highlights. Two-piece slide box. Excellent condition. (Another available.)

36. Aristo 0906 --- New in box, 10 inch Bi-Scholar rule with case, instructions, and outer box. Scales: K, A [B, BI, S, C] D, L, P, and, on the other side, ST, T1, T2, DF [CF, CIF, CI, C] D, DI, S. White plastic with yellow highlighted scales. Two-piece, red and white hard plastic case. Instructions in German. Yellow, black, red, and white outer box. Everything is new. (Others, new and used, available.)

37. Aristo 0906LL --- 10 inch Aristo-BiScholar rule in case with box. Scales: L, K, A [B, BI, S, C] D, LL3, LL2, LL1, and, on the other side, ST, T1, T2, DF [CF, CIF, CI, C] D, P, S. White plastic with yellow scale highlights. Red and ivory, two-piece, hard plastic case. Worn outer box, but the rule and case are very good.

38. Aristo 0906/0906 LL Instructions --- Instruction manual for the Aristo 0906 and 0906 LL, in German.

39. Aristo 0908 --- New in box, 10 inch rule, with case, instructions, separate equivalents rule, and outer box. Scales: LL1, LL2, LL3, DF [CF, CIF, CI, C] D, L, K, and, on the other side, T1, T2, A [B, BI, CI, C] D, P, S, ST. White plastic with yellow highlighted scales. Separate yellow plastic equivalents and values rule, Aristo 1365. Red and white, two-piece, hard plastic case. Instructions in German. Yellow, black, red, and white outer box. Everything is new. (Others, almost new, available.)

40. Aristo 0908 Instructions --- a 31-page instruction folder for the Aristo TriLog 0908. Complete illustrated instructions, in German. Very good condition. (Another available.)

41. Aristo 909 --- 10 inch Aristo-Multitrig. Scales: P, A [CF, CIF, CI, C] D, DI, and, on the other side, K, DF [B, T, ST, S] D, L. Marked: Aristo, Nr. 909, Made in Germany, Aristo-Multitrig, Charvoz, DBGM. White plastic with some yellow-highlighted scales. Good condition -- minor scratching and a little dirt.

42. Aristo 0911 --- New in box, 10 inch Simplex rule, with instructions, case, and outer box. Scales: A [B, C] D. 25 cm scale on the top. 10 inch scale on the bottom. White plastic with yellow scale highlights. Red and white, two-piece, hard plastic case. Yellow, black, red, and white outer box. Instructions in German. Everything new. (Another available.)

43. Aristo 914 --- 10 inch Elektro slide rule in case. Marked, Dennert & Pape, Hamburg. Scales: E, A [B, R, C] D, E, and, on the back of the slide, [sin, lg, tg]. K scale on the bottom edge. 28 cm scale on the top beveled edge. Volt and Dynamo scales in the slide well. 11 inch scale on the back. White plastic. The left end of the slide is clear plastic with an indicator line with which to read the scales in the slide well. Brown, two-piece slide case. Everything in very good condition.

44. Aristo 915E --- New in box, 10 inch, Aristo-Elektro rule, with case, instructions, separate equivalents rule, and box. Scales: K, A(kW) [B(PS HP), BI, CI, C] D, LL3, LL2, D/M(=), V, and, on the back of the slide, [S, ST, L, T]. White plastic with clear plastic beveled edges. 28 cm scale on the top edge. 1/20 inch and 1/32 inch scales on the bottom edge. Back has a clear section so that the back of the slide can be seen. Wide cursor with multiple lines. Separate equivalents and other measures rule, Aristo 1364. Fits in special slot in the two-tone gray, hard plastic case. 23-page manual. Yellow outer box. This is a beautiful, new set.

45. Aristo 915 --- New, 10 inch, Aristo-Elektro rule, with case and separate equivalents rule. Scales: K, A(kW) [B(PS HP), BI, CI, C] D, LL3, LL2, D/M(=), V, and, on the back of the slide, [S, ST, L, T]. White plastic with clear plastic beveled edges. 28 cm scale on the top edge. 1/20 inch and 1/32 inch scales on the bottom edge. Back has a clear section so that the back of the slide can be seen. Wide cursor with multiple lines. Separate equivalents and other measures rule, Aristo 1364. Fits in special slot in the two-tone gray, hard plastic case. (Others, almost new, available.)

46. Aristo 0929 --- 10 inch Aristo-MultiRietz rule, in case with separate conversion rule. Scales: P, A [B, T, ST, S, C] D, DI, and, on the other side, K, DF [CF, CIF, CI, C] D, L. Separate 10 inch fraction/decimal conversion rule, Aristo Nr. 1369. Two piece gray slide case. Everything in fair, but fully useable condition.

47. Aristo 939 --- New, 10 inch Aritso-Stahlbeton, System Gottsch, rule with case, separate equivalence rule, and instructions. Scales: kgm, tm, M [b, "Q"b, K, r] h, and, on the other side, kgm, M, tm, "Q"'e [b, "Q"b, r] z, h, plus some tables. Heavy white plastic. 3 1/2 inch wide cursor with unusual markings. Separate yellow plastic equivalents rule, Tabelle A, Okt. 1959. Instruction manual in German. Two-piece, gray slide case. Everything new.

48. Aristo 940 --- Almost new in box, 10 inch, Aristo-Stahlbeton, System Gottsch, rule with case, instructions (in German), separate rule, and outer box. Scales: Fe, me, Me [b, B, BI, me, k, kd, alpha, Ee, k.b, CI, C] ke, h, and others that are hard to designate. On the back are tables and illustrated instructions. The 4 1/4 inch wide cursor is marked with many lines, numbers, curves, etc. Very heavy white plastic. Two-tone gray, two-piece, rigid plastic slide case. Instructions in German. Separate plastic Aristo 1364 equivalents and measurement rule. Yellow outer box. Almost new.

49. Aristo 0958 --- New in box, 10 inch Aristo-Geodat rule with case, instructions, separate measurement/equivalents rule, stand, and outer box. Scales: tan, arc, DF [CF, CIF, CI, C] D, P, sin, cos, and, on the other side, 1-cos, 1-cos, A [B, 1/tan a/2, sin cos, cos2] D, L, K. White plastic with yellow scale highlights. Rubber bumpers to allow rule to sit on desk. Stand. Instructions in German. Separate measurement/equivalents rule, 1364. Two-piece, two-tone gray, hard plastic case. Yellow outer box, worn and name-stamped. Everything else is new. [[5]] Another, almost new, with case and separate rule only. (Others, new and used, available.)

50. Aristo 965 --- New in box, 10 inch Aristo-Commerz II rule, with case, instructions, separate equivalents rule, and outer box. Scales: %, KZ [T2, P2, P1, T1] Z, M (for converting British/U.S measures to metric), British Pound, s./d. , and, on the back of the slide, [ZZ3, ZZ2, ZZ1, ZZ% (ZZ's are compound interest scales.), T1]. 28 cm scale on the top, clear plastic, beveled edge. 1/20 inch, 1/32 inch scales on the bottom, clear plastic, beveled edge. White plastic with clear plastic beveled edges and a clear plastic section on the back, through which to read the back-of-slide scales. Separate yellow plastic equivalents rule, Aristo 1361. 30-page instruction manual. Two-tone gray, two-piece slide case, marked Aristo. Yellow, black, red, and white outer box. Everything new. A very interesting, nice set. (Others, new and used, available.)

51. Aristo 967 --- 10 inch rule. Scales: K, A [B, CI, C] D, P, sin, tg, and, on the back of the slide, [LL1, LL2, LL3]. 28 cm scale on the top beveled edge. White plastic. Marked Dennert & Pape, Hamburg-Altona, Darmstadt D. Some yellowing and fading.

52. Aristo 967 U --- Essentially new, 10 inch rule in slip case/box and separate rule. Scales: K, A [B, BI, CI, C] D, P, S, T, and, on the back of the slide, [L, LL1, LL2, LL3]. 28 cm scale on the top beveled edge. White plastic. Marked, Made in Germany, Aristo, Nr. 967U. Separate equivalents rule. Tan, two-piece slide box, marked Aristo Darmstadt. Everything essentially new. (Others available.)

53. Aristo 0968 --- New in box, 10 inch Aristo Studio rule in hard plastic slide case with a separate equivalents rule (Aristo 1364), stand, instructions, and outer box. Scales: LL01, LL02, LL03, A [B, L, K, C] D, LL3, LL2, LL1, and, on the other side, ST, T1, T2, DF [CF, CIF, CI, C] D, P, S. White plastic with some yellow-highlighted scales. Marked: Aristo 0968, Germany, Aristo Studio. Rubber bumpers to allow the rule to be used while flat on a desk. Gray, plastic, clip-on stands to allow the rule to be used on a desk, in an upright position. A two-sided flexible plastic equivalents rule is also included and fits into a special slot in the case. Two-tone, gray, hard-plastic slip case, marked Aristo. Instructions, copyright 1954, in German. Yellow outer box. Everything new. (Others, new and used, with scale variations, available.)

54. Aristo 0969 --- New in box, 10 inch, Aristo StudioLog, with stand, case, instructions, supplemental rule, and outer box. A massive rule, over 2 1/2 inches wide. Scales: LL00, LL01, LL02, LL03, A [B, BI, K, L, CI, C] D, LL3, LL2, LL1, LL0, and, on the other side, ST, T1, T2, DF [CF, CIF, S, CI, C] D, DI, P, S. White plastic with yellow scale highlights. 2 1/4 inch wide cursor. Stand. Instructions in German. Separate 1364 rule with various measures. Two-tone gray, hard plastic case. Everything new. An unusual, uncommonly-seen rule. (Others available.)

55. Aristo 0970 --- New in box, 10 inch MultiLog, with case, instructions, stand, and outer box. Scales: LL00, K, A [B, T, ST, S, C] D, DI, LL0, and, on the other side, LLO1, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2, LL1. White plastic with yellow scale highlights. Separate measuring and equivalents rule, Aristo 1364. Stand. Instructions in German. Two-piece, two-tone gray, hard plastic case. Yellow outer box. Everything new. (Others, new and used, available.)

56. Aristo 1055 --- 20 inch, Aristo-Commerz I rule in case. Scales: ?, KZ [T2, P2, P1, T1] Z, M, pounds sterling, s./d. 50 cm scale on the top beveled edge. White Plastic. Very good condition. Two-piece, gray slide box.

57. Aristo 1067U --- New in box, 20 inch rule. Scales: K, A [B, BI, CI, C] D, P, S, T. White plastic. 3 inch wide cursor. Gray, two-piece slide box. Everything new. Manual available.

59. Aristo 10174 --- Essentially new in box, 10 inch rule, marked Strahlenschutz-Rechenschieber. Heavy white plastic. Two sides of specialized scales in German (that I can't read). Two-piece slide case. Everything essentially new.

60. Aristo 90184 --- 10 inch rule marked Stahl, Bemessungsschieber, Baustahlgwebe, Dussildorf, in case. There are a number of scales and charts in German that are unfamiliar, along with: A [B, CI, C] D, and, on the other side, h in cm, M in tm [Bn 250, Bn 150, Bn 250] fe in cm2. White plastic with a yellow slide. Red and ivory, two-piece, plastic slide case. Good condition with some scratches.

61. Aristo Instructions --- Instructions for Aristo Studio, Studiolog 868, 0968, 01068, 0969. 41 pages. In German.

62. Artillery Set - Very Large, Very Unusual --- Brand new in very large, 14 x 16 inch, case. 8 heavy white plastic slide rules, in two sizes, all different. Extra cursors. Large circular, plotting/charting device on an 8 x 12 inch heavy plastic card. German. Case is marked: Rechenschieber. SchuBwerte. Art., FH 155mm, Satz. Ask for additional information.

63. Aston & Mander Paper Makers Rule --- 45 inch boxwood Papermakers Rule, Designed by L. Evans. Scales marked: A [B, C] D(Cost), E(Price), F, and, on the other side, Inches, Meters. Other lettering that may relate to papermaking. Marked: Aston & Mander 1917 LTD. Also marked: Papermakers Rule Designed by L. Evans. A slot run across near the top front of the rule, In that slot are two moveable brass indicators, essentially triangular. Brass end pieces. The rule is 2 1/2 inches wide, 45 inches long. Two chips in the boxwood, but generally in good condition.

64. Atlas Copco --- 5 1/2 inch specialty rule, with leather case and instructions. No cursor. Seems to be for valve flow calculations. Scales: delta P [d, P, L] Q. White plastic. Very good condition, but no cursor. Copyright Atlas Copco, Stockholm, Schweden. Instructions on the back and on separate sheet, in Swedish? Brown leather slip case marked Atlas Copco.

65. Bausch & Lomb ZTS Scale Matching Calculator --- 8 inch circular rule. Three wheels with scales: Photo R.F.D., Map R.F.D., Photo Magnification/Zoom Setting, Map Lens. To assist in the selection of map and photo magnifications on the Z.T.S. Copyright 1973. Light, white and clear plastic. Very good condition.

66. Blundell S150-10 --- 10 inch rule. Scales: S, T, A [B, CI, C] D, K, L. Marked: Blundell, Harling, England. White plastic. Very good condition.

67. Blundell 802 --- New in case, 10 inch Blundell Harling Log-Log rule with case and instructions. Scales: K, LL2, LL3, A [B, L, CI, C] D, S, T, ST. White plastic with yellow scale highlights. Instructions and two-piece blue plastic slide case. New.

68. Blundell 812 --- 5 inch Classmate rule, in case, with instructions. Scales: S, T, A [B, CI, C] D, K, L. White plastic. Made in England. Tapered end pieces. Instructions on a separate plastic rule. Blue vinyl slip case. Everything in excellent condition.

69. Blundell 909 --- 5 inch rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [S, ST, T]. White plastic. 6 inch scale on the top beveled edge. MeLeSco on the back. Very good condition. Brown leather slip case, in good condition. (Another available.)

70. Boots Ringplan --- 10 inch rule in case, with instructions. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 25 cm scale on the top beveled edge. 10 inch scale on the bottom beveled edge. White plastic. Very good condition. Yellow instruction sheet. Gray and clear plastic slide case. Boots Ringplan --- 5 inch rule in case with instructions. Scales: A [B, CI, C] D, L, and, on the back of the slide, S, ST, T. 14 cm scale on the top beveled edge. White plastic with blue scale highlights. Made ion Germany. Plastic case. Instructions. Everything in excellent condition.

71. Boxwood Proof Rule --- 9 inch boxwood proof slide rule with brass ends. Very good condition. (Others available.)

72. Boxwood Proof Rule --- 9 inch boxwood proof slide rule with brass ends. Barrow & Jackson, London. Very good condition with a small chip on the slide.

73. Boxwood Double-Slide Proof Rule --- 9 1/2 inch, boxwood proof rule with two slides and brass ends. Marked Dring & Fag, London; sold by S. Cock, London. In fair condition - some dark staining on a couple of scales and some scratches and other marks.

74. Boxwood Steel Rule --- 18+ inch boxwood rule marked: Steel and also F. Robson & Co., 46 Dean St., Newcastle on Tyne. Scales: Breadth in Inches [Thickness in Ins & 32nds, Weight in Lbs & Cwts. Small chip on the end of the Length in Feet Scale, otherwise in good condition except for some scratches, mainly on the back.

75. Boxwood Rule --- 24 inches long. Scales: A [B, C] D, Grit Line, Grit Diameter, and, on the other side, E, Inverted Line [C, B] A. 24 inch scale on the top edge. Reverse 24 inch scale on the bottom edge. A very good boxwood rule with brass end pieces.

76. Bristol Line 18-4 --- A narrow, 4 inch rule in case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 4 inch scale on the top beveled edge. White plastic. Marked: Bristol Line No. 18-4. Japan. Excellent condition. Brown leather slip case, with advertising name in gold, in very good condition.

77. British Thornton AD 050 --- 10 inch Log Log rule in case. Scales: LL2, LL3, L, A [B, CI (ISd, ITd, Td, Sd) C] D, S, ST, T. Very heavy white plastic with tan plastic end pieces. Very good condition. Made in England. Gray rigid plastic slip case. (Another available.)

78. British Thornton AD 070 --- 10 inch Modern Maths rule in case. Scales: K, A [B, CI, C] D, L. Very heavy white plastic with tan plastic end pieces. Excellent condition, just name scratched on back. Gray, two-piece plastic slide case.

79. British Thornton AD 150 --- 10 inch rule in case. Scales: LL1, LL2, LL3, A [B, CI, K, C] D, S, ST, T. Heavy white plastic with tan end pieces. Grey plastic two-piece slide case. Scratches on the case. Rule in good condition. (Another available.)

80. British Thornton P271 --- New in box, 10 inch rule in case with instructions. Scales: LL2, LL3, L, A [B, CI, C] D, S, ST, T. Very heavy white plastic with tan plastic end pieces. 24 page manual which includes a brief history of British contributions to slide rule invention and development. Black, two-piece, hard-plastic, slide case. Black outer box. Everything new. (Others available.)

81. British Thornton P281 --- 10 inch rule in case. Scales: cm, K, DF [CF, CI, C] D, A, inch. Very heavy white plastic with tan plastic end pieces. Very good condition -- just a little dirt. Made in England. Black flip-top snap case in worn condition.

82. BRL M.O. Humidity Slide Rule, Mk. IV --- an unusual 10 inch rule in case with a cursor that is changed from one side to the other. Scales: Vapour Pressure [Pressure/Dry Bulb/Dew Point, Adjusted Depression of Aspirated Wet Bulb/Adjusted Depression of Aspirated Ice Bulb] Wet Bulb and Dew Point, Frost Point, Dew Point, and, on the other side of the slide, [Dry Bulb Dew Point, temperature, Depression of Wet Bulb in Screen/Depression of Ice Bulb in Screen. On the back: Vapour Pressure, Frost Point, Dew Point, and instructions. Made of very heavy white plastic, with two cursor tracks, on for each side. The cursor itself has metal top and bottom guides. Worn case, but the rule is in excellent condition. Unusual.

83. BRL Students --- 10 inch rule in box. Scales: K, A [B, R, C] D, M. Instructions on the back. White plastic. Red box. Good condition.

84. BRL P150: 5 inch rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [S, ST, T]. 5 inch scale on the top beveled edge. 15 cm scale on the back. White plastic. Made in England. Brown leather slip case, marked B.R.L. in gold. Everything in very good condition.

85. BRL 303 --- 10 inch Academy 303 Rietz rule. Scales: L, K, A [B, CI, C] D, S, ST, T. Made in England. White plastic.

86. BRL Academy 303 --- 10 inch Rietz rule in case. Scales: L, K, A [B, CI, C] D, S, ST, T. White plastic. Except for slight chipping of the cursor, very good condition. Plastic case worn.

87. BRL Academy 304 --- 10 inch Darmstadt rule. Scales: L, K, A [B, CI, C] D, P, Sin, Tan, and, on the other side of the slide, [LL1, LL2, LL3]. White plastic. Spring missing from cursor. Otherwise, good condition. Partial box.

88. Buss Dual Slide Boxwood Proof Rule --- 12 inch boxwood, 2 slide proof rule. Buss Maker, 48 Hatton Garden, London. Also marked, Pullen & Funnell. Brass ends. Very nice.

89. Carl Schletcher & Schull --- 10 inch rule in case. Scales: A Amp.[B qmm, K m] ? Volt, and, on the back of the slide, [C, ?, ?]. 26 cm scale on the top beveled edge. Marked: Carl Schletcher & Schull, Duren, D.R.G.M. White laminate on mahogany. Heavy metal-framed cursor with some plating loss. Two minor corner chips on the laminate. Equivalents label on the back is mostly not readable. Otherwise the rule is in good condition. Black. Two-piece slide case.

90. C-Thru 27 --- 5 inch rule in case, with instructions. Scales: A [B, CI, C] D, and on the back, S, L, T. Equivalents on the back of the rule. Lightweight white plastic. Clear plastic slip case. Instruction sheet.

91. C-Thru 88 --- 10 inch rule in case with instructions. Scales: A [B, CI, C] D, K, and, on the back, S, L, T. Equivalents on the back of the slide. Light-weight, white plastic. Instruction sheet. Clear plastic slip case. Like new.

92. C-Thru S889 --- Excellent, 10 inch rule in case. Scales: LL01, K, A [B, T, ST, S] D, L, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. White plastic. Made in Japan. Black vinyl case. Excellent condition. (Another available.)

93. Charvoz-Roos, SR-109 --- 10 inch rule in case. Scales: T, DF [CF, CIF, CI, C] D, S, ST, and, on the back of the slide, [B, K, L, C]. Made in the U.S.A. White laminate on mahogany. Plastic cursor. Equivalents and formulas on the back. The leather, flip-top case is well worn, but the rule itself is in excellent condition.

94. Circular on Card --- 2 inch circular rule on a 2 1/2 X 4 inch card. Scales: A [B]. Also, 5 cm and 2 inch scales. Light white plastic. Made by Perrygraf. Ad for Dow Industrial Service. Very good condition.

95. Classic Series 1 --- 5 inch rule in case. Scales: A [B, C] D. 5 inch scale on the top beveled edge. 13 cm scale on the bottom edge. Equivalents on the back, White laminate on mahogany. Made in England. Very good condition. Two-piece slide box.

96. Classic --- 10 inch rule in case with instructions. Scales: LL2, A [B, S, T, C] D, LL3. 10 inch scale on the top beveled edge. 26 cm scale on the bottom edge. White laminate on mahogany. Made in England. Very good condition. Blue, two-piece slide case with some wear. Instructions.

97. Compass 1321 --- Very nice, 10 inch rule in brown leather, flip-top case. Scales: L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2, and, on the other side, LL0, LL00, A [B, K, CI, C] D, S, ST, T. Marked: Compass, No. 1321, Made in Japan, E.K.-3. Frameless cursor. White laminate on bamboo. A tiny bit of dirt, but otherwise in excellent condition. Case, marked Compass, Made in Japan, has a few rubs and creases at the hinge points, but is solid except for a broken strap to hold down the flip-top.

98. Concise Circular 28 -- 3 1/8 inch circular rule, Concise 28. Marked American-Standard, Controls Division. With case and instructions. Scales: D [C, CI, A, K]. Equivalents on the back. White plastic. Black case. 18 page manual. Very good condition. (Another available.)

99. Concise Circular 28N --- New, 3 1/4 inch circular rule, Concise Circular Slide Rule, Made in Japan, with case and instructions. Scales: D [C, CI, A, K]. Heavy white plastic. Area, Weight, Volume, Velocity, Pressure, Flow Rate, Length, Power-Energy-Heat, Density, and Temperature conversions on the back. Yellow, vinyl slip case. 28-page instruction booklet. Everything is new. (7) Plus one from Tanaka Engineering.

100. Concise Booklet --- Concise Conversion Tables and Circular Slide Rule, Model CTCS-552 booklet. Small, 16-pages.

101. Concrete Quality Calculator --- 11 inch rule. Brown fiber slip case. Scales: A (Depth or Thickness in Feet) [B (Width of Height in Feet), C (Length in Feet)] D (Cubic Feet/Yards). White laminate on light-colored wood. Instructions on the back. General Transit-Mix Concrete Service, Hartford Conn. Five-digit phone number. Made by Slide Rule and Scale Engineering Co., Mt. Olive, Ill. No cursor was intended. Case needs a few stitches.

102. Dennert & Pape (Unusual) --- 10 inch rule in case. Case is marked: Berlin - Anhaltische Maschinenbau - Actien - Gesellschaft. Berlin NW. 87. Scales: Rohr Phi D in Cm. [Druckverlust, H in Meter Wassersaule (Wasser), Rohrlange, L in M.] Durchgangsmenge Q in CBM Gas Pro St. - in CBM Wasser Pro Min., and, on the back of the slide, [Druckverl H in m/m WSS., Rohrlange L in M. 25 cm on the top beveled edge, continuing to 55 cm in the slide well. 10 inch scale on the bottom beveled edge. White laminate on mahogany. Instructions in German on back, for both Steinkohlengas and Wasserleitungen. Very good condition. Black, two-piece slide case also very good.

103. Dennert & Pape --- 10 inch rule with chisel cursor, in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 26 cm scale on the top beveled edge, continuing to 52 cm in the slide well. 26 cm scale on the bottom edge. White laminate on mahogany. Equivalents on the back. Marked in the well, Dennert & Pape - Altona, Patent. Brass "fingered" cursor. Good condition - a small crack in the laminate on the top cm scale. Black, two-piece slide case in very good condition.

104. Dennert & Pape --- 10 inch rule. Scales: F(K), A [B, C] D, E(L), and, on the back of the slide, [S, T]. 25 cm scale on the top beveled edge. 1:25 scale on the bottom edge. Marked: Dennert & Pape, Altona 19, System Rietz, D.R.P No. 126499. Equivalents on the back, somewhat stained. White laminate on mahogany. Good condition. Partial case.

105. Dennert & Pape --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 25 cm scale on the top beveled edge, continuing to 53 cm in the slide well. 27 cm scale on the bottom edge. White laminate on mahogany. Equivalents on the back. Marked Dennert & Pape - Altona. Heavy metal cursor. Very good - excellent condition. Black, two-piece slide case in very good condition.

106. Dennert & Pape --- 20 inch rule. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 50 cm scale on the top beveled edge, continuing to 104 cm in the slide well. White laminate on mahogany. Heavy metal-framed cursor. Marked Dennert & Pape, Altona, and, in the slide well, D.R.P. No 126499. Equivalents on the back. Good condition except for two small chips in the cm scale.

107. Dietzgen --- 5 inch rule, brown leather case, broken cursor. Scales: K, A [B, CI, C] D, and, on the back of the slide, [S, L, T]. On the back, a 5 inch scale and a 12 cm scale. Marked Dietzgen, Made in U.S.A. White plastic. One corner chipped. One of three screws missing. Some dirt. Cursor broken off. Leather slip case is solid, but worn.

108. Dietzgen --- 10 inch rule in case. Scales: K, A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 25 cm scale on the bottom edge. White laminate on mahogany. Equivalents label on the back. Very good condition, except for 1/4 inch missing laminate on the inch scale. The slide is slightly longer than the rule. The case is brown leather with an expanded section at the top; is marked Dietzgen, Made in the U.S.A., in gold, and is in excellent condition.

109. Dietzgen --- 10 inch rule in case. Scales: K, A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 25 cm scale on the bottom edge. White laminate on mahogany. Equivalents label missing from the back, as are two of the four screws. Initials on the back. Otherwise, very good condition. The cursor is a K+E. The slide is slightly longer than the rule. The black box/case is missing its flip top.

110. Dietzgen Maniphase Manual --- 80 page manual. Yellow cover. 1928. Very good condition. For a K-A-B-CI-C-D rule.

111. Dietzgen N1725 --- 10 inch Dietzgen Microglide, Vector Type Log Log, in case. Scales: Th, Sh2, Sh1, A [B, T, T, ST, S] D, DI, K, and, on the other side, LL01, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2, LL1. White laminate on mahogany. Serial # 112222. Black, flip-top case. Very good condition.

113. Dietzgen 1731 --- Almost new, 10 inch Dietzgen Maniphase Multiplex, Trigonometric Type Log Log Rule, in tan leather, flip-top case. Scales: LLO1, K, A [B, T, ST, S] D, L, LL1 and, on the other side, LLO2, LLO3, DF [CF, CIF, CI, C] D, LL3, LL2. White laminate on mahogany. Serial # 400569. Metal cursor guides. Excellent condition. The tan leather case is in very good condition, just a few small marks.

114. Dietzgen 1732 --- 10 inch Dietzgen Maniphase Multiplex, Decimal Trig Type Log Log Rule in black leather-covered, flip-top box. Scales: L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2, and, on the other side, LL0, LL00, A [B, T, ST, S] D, DI, K. Eugene Dietzgen Co. Pats. 2,170,144 and 2,285,722. Made in U.S.A. Serial # 558573. White laminate on mahogany. Cursor ends are metal. Rule is in very good condition. Box/case is in very good condition. (Others available.)

115. Dietzgen 1732 Manual --- The Dietzgen Maniphase Multiplex Decimal Trig Type Log Log Slide Rule No. 1732 manual. 106 pages. Gold soft cover. Picture of the 1732 rule. Like new. (Another available.)

116. Dietzgen 1732 Box/Case --- Black covered, box/case: solid, with tape on one end and some wear marks, labeled Dietzgen.

117. Dietzgen 1734 --- 10 inch, Decimal Trig Type Log Log, Dietzgen Microglide. Scales: LL01, K, A [B, T, T, ST, S] D, DI, LL1, and, on the other side, LLO2, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2. White laminate on mahogany. Pats. 2,170,144 and 2,285,722. Serial # 025326. Very good condition.

118. Dietzgen 1735 --- 10 inch Dietzgen Maniphase Multiplex, Vector Type Log Log Rule, in case. Scales: L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2, and, on the other side, LL0, LL00, A [B, T, ST, S] D, Th, Sh2, Sh1. K+E cursor. White laminate on mahogany. Owner's name neatly engraved on the rule. Serial # 102894. Good condition -- just a little yellowing and light scratches. Tan leather flip top case, worn, but useable.

119. Dietzgen 1738 --- 10 inch, Dietzgen Multiphase Style-M, Improved Decimal Trig Type Log Log Rule in case. Scales: LL01, K, A [B, T, T, ST, S] D, DI, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2. Copyright 1954. White paint on magnesium. Typical paint chips on edges. Some marks on the metal end pieces. Otherwise in good condition. Brown leather, flip-top case in worn condition.

120. Dietzgen 1740 --- Like-new, 10 inch Phillips Rule in case. Scales: E, A [B, R, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 25 cm scale on the bottom edge. White laminate on mahogany. Equivalents on the back. Like-new. The black cardboard case, marked Dietzgen Phillips Slide Rule, 1740P, is almost new.

121. Dietzgen Phillips 1742, 20 Inch --- 20 inch Phillips rule. Scales: E, A [B, R, C]D, and, on the back of the slide, [S, L, T]. 2O inch scale on the top beveled edge. 50 cm scale on the bottom edge. Equivalents on the back. White laminate on mahogany. No case. Excellent condition.

122. Dietzgen 1743 Manual --- The Dietzgen Maniphase Multiplex Trig Type Slide Rule No. 1743, A Self-Teaching Manual. Yellow softcover. 92 pages. Copyright 1952. Good condition, just some tape marks on the cover.

123. Dietzgen 1744 ---Excellent, 10 inch Polymath Multiplex, Decimal Trig Type Rule in black leather case. Scales: K, A [B, T, ST, S] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. Metal framed cursor with metal guides. White laminate on mahogany. Serial # 033126. Excellent condition, as is the black, flip-top case. (Others available.)

124. Dietzgen 1745 --- 10 inch rule. Scales: K, A [B, CI, C] D, and, on the other side, A [S, T] D, L. White laminate on mahogany. One cursor glass broken, otherwise, very good condition. Black Box/case, flip top, marked Dietzgen Maniphase Slide Rule, also very good condition.

125. Dietzgen 1746 --- 10 inch, Dietzgen Maniphase Multiplex, No. 1746, in leather case. Scales: A [B, S, T] D, K, and, on the back, DF [CF, CIF, CI, C] D, L. White laminate on mahogany. Serial # 706555. Cursor is glass with metal frame. The rule itself is in very good condition, just slightly yellowed and a little dirt. The black leather flip-top case, marked Dietzgen, is in very good condition, just a few marks. (Another available.)

126. Dietzgen 1757 --- 10 inch Primatrig rule with instructions. Scales: L, K, A [B, CI, C] D, T, ST, S. Conversions and equivalents on the back. White plastic with black plastic end pieces. Some scratches.

127. Dietzgen 1767 --- 10 inch rule in tan, leather slip case. Scales: K, S, A [B, CI, C] D, T, L. White plastic with black end pieces. Marked: National, Dietzgen No. 1767, Made in U.S.A. Very good condition. Case solid, with some dirt.

128. Dietzgen 1767P --- 10 inch rule in black slip box. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch and 25 cm scales along with equivalents tables on the back of the rule. White paint on light-colored wood. Marked 1767P National, Dietzgen, Made in U.S.A. Good condition -- some dirt and wear. Black cardboard slip box is very solid, taped at both ends, marked Dietzgen 1766P, Germany. (Another available.)

129. Dietzgen 1768-P --- Older model, 10 inch rule. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White laminate on light-colored wood. Marked, Reliance. Equivalence label on the back. Cursor is an old K+E, heavy metal frame. Good condition.

130. Dietzgen 1768-P --- New, 10 inch rule, with instructions. Scales: K, S, A [B, CI, C] C, T, L. Marked, Japan. White plastic with light blue plastic slide. Instruction booklet. Everything new, still sealed in original packaging. (Others, used, available.)

131. Dietzgen 1771 --- 5 inch Redirule, with case, instructions, and box. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 5 inch scale on the top beveled edge. Ace Electronics on the back and case. Rule, case, and manual are in very good condition. The external box is not.

132. Dietzgen 1772A --- 5 inch rule with case, instructions, and box. Scales: K, A [B, CI, C] D, L. White plastic with black end pieces. Black slip case. Instruction manual, Maniphase Slide Rule by Dietzgen, 15 pages. Original yellow outer box. Everything in very good condition.

133. Dietzgen 1776 --- 5 inch Redirule, in case. Scales: K, A [B, T, ST, S] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. White plastic. Brown leather slide case with pocket clip. Everything in excellent condition.

134. Diwa 1-1 --- Excellent, 10 inch rule, Diwa-Denmark, Rietz-Ideal No. 1-1, in leather case. Scales: L, K, A [B, CI, C] D, S, ST, T. 10 inch, 25 cm scale on the top beveled edge. On the back it is marked: Rysensteen Gymnasium. White plastic rule in very good condition, as is the brown leather, flip-top case, marked, Diwa, Denmark. (Another available.)

135. Diwa 111 Electro --- 10 inch rule in wooden clam-shell case. Scales: LL2, A/KW [B/HP, CI, C] D, LL3, and, on the back of the slide, [S, S&T, T]. 27 cm scale on the top beveled edge. K scale on the bottom edge. In the slide well, Motor, Volt. Denmark. White laminate on mahogany. Cursor wraps around to the K scale. Equivalents on the back. Mahogany, clam-shell case, a bit worn. The rule, however, is in excellent condition.

136. Diwa 201 --- 10 inch Technical rule in wooden, clam-shell case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 27 cm scale on the top beveled edge. 1:25 scale on the bottom edge. White laminate on mahogany. Equivalents, in French, on the back. Beautiful wooden, clam-shell case with snaps. Very good condition. (Another available.)

137. Diwa 501-1 --- Excellent, 10 inch rule, Diwa-Denmark, Reitz, No. 501-1, in leather case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 10 inch, 25 cm scale on the top, beveled edge. White plastic rule in excellent condition. A very nice brown leather, flip-top case, marked Diwa, Denmark.

138. Diwa 601 --- 5 inch rule in brown leather slip case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 5 inch scale on the top, beveled edge. White plastic. Labeled Diwa, Denmark, No. 601. The name LaPoint is printed on the back. Some dirt, but, overall, very good condition, as is the brown leather slip case. (Another available.)

139. Diwa 601-1 --- 5 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 11cm / 4 inch scale on the top beveled edge.. On the back, and ad for Rocky Mountain Enterprises, Inc., Salt Lake City, Utah. Brown leather case. Both in good condition. (Another available.)

140. Dring & Fage Double Slide, Boxwood Proof Rule --- 9 inch boxwood rule with two slides. Brass ends. Made by Dring & Fage, London. Sold by S. Cock, London. Some darkening, but a nice piece.

141. Dual 10"/5" Slide Rule --- 5 inch rule in case. Scales: K, A [B, S, T, C] D, DI, and, on the other side, inch to decimal conversions [L, C2, C1] D1, D2, D. White laminate on mahogany. Black slide case. Very good condition.

142. Dynamo/Motor" --- 10 inch rule in leather case. Scales: E (Dynamo/Motor), V, A [B, K, CI, C] D, S, T, and, on the back of the slide, [LL3, LL2, LL1, L]. 25 cm scale on the top beveled edge. 10 inch scale on the bottom edge. Various electrical symbols and markings on the scales. White laminate on bamboo. Plastic cursor. Slide slightly loose; otherwise in very good condition. Brown leather flip-top case, marked Made in Japan, excellent except for an owner's name plastic-labeled on the flip top.

143. Ecobra --- Very nice, almost new, 5 inch rule in case. Made for Glasfaser Gesellschaft M.B.H. Scales: E, A [B, Isolierdicke, Objekt-Temp., C] D, R, and, on the other side, Ausserer Rohr [Isolierdicke] Faktor F. White, aliminum. Tan leather slip case. Almost new.

144. Ecobra R141 --- New in case 5 inch Rietz rule with instructions. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 13 cm scale on the top beveled edge. 5 inch scale on the bottom beveled edge. White plastic with green slide. Marked Zur Bonsen on the back of the rule and the case. Brown leather slip case. Instructions in German. Everything new. (Others available.)

145. Engineering Instruments 10-B --- 9 1/2 inch rule. Scales: A [B, CI, C] D, K. White paint on light-colored wood. Equivalents and other measures on the back. Slide is slightly longer than the rule. Marked Engineering Instruments, Peru, Indiana, Made in U.S.A., Pat. Pend. (Others available.)

146. Engineering Instruments 250-V --- 9 1/2 inch rule, in case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White plastic laminate on light-colored wood. Equivalents and other measures on the back. Marked Engineering Instruments, Peru, Indiana, Made in U.S.A., Pat. Pend. Very good condition, just a little dirt. The blue slip case, OK condition.

Faber --- Also see Kaufmann and Klawun.

147. Faber? --- 10 inch rule in case. Scales: A [B, C] D. 26 cm scale on the top beveled edge. 10 inch scale on the bottom edge. White laminate on mahogany. Heavy metal framed cursor. Good condition. Two-piece black slide case with just corner wear.

148. Faber Castell (Krupp) --- 5 inch rule in case. Scales: A [B, C] D, nad, on the back of the slide, [sin, lg, tg]. Marked: Krupp Widia on the back. In the well: Fried. Krupp A.G., Hartmetallbetriebe, Essen. A.W. Faber Castell. Charts on the back. White laminate on mahogany, thin and slightly warped. Otherwise, generally good condition. Case worn.

149. Faber Electrical --- 10 inch rule. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. LL3, LL2 on the top beveled edge. 28 cm on the bottom edge. Dynamo and Volt scales in the slide well. White laminate on pearwood. Unusual cursor - metal frame with a hook-like section on the top to read the LL scales. Slightly warped. Marked A.W. Faber D.R.G.M. 271169 & 247514. Good condition. (Another available.)

150. Faber Calculating Rule --- 10 inch rule. A. W. Faber's Calculating Rule, London, Made in Bavaria. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 27 cm scale on the bottom edge. Extension to 54 cm in the slide well. Equivalents on the back. White laminate on pearwood. Heavy metal framed cursor. Black, two-piece cardboard slide case. Case somewhat worn. Rule in very good condition.

151. Faber Castell 1/22 --- 10 inch Disponent rule, in case. This is a special business rule. Scales: DF [CF, CI, C] D, L, and, on the bottom edge, sh/d, and pounds sterling. On the top of the face are markings for various weights and measures, both U.S. and British. 27 cm scale on the top, beveled edge. White laminate on pearwood. The cursor wraps around to cover both the front and the bottom edge. Equivalents on the back. Clear and green plastic case. Everything in very good condition. (Others available.)

152. Faber-Castell 1/22/322 --- 10 inch rule in case. Marked, Disponent, fur den Kaufmann. Scales: US/British weights and measures, KZ [T, val./P%, E/T] V/Z, L, and, on the back of the slide, [ZZ1, ZZ2, T1]. 27 cm scale on the top beveled edge. On the bottom edge, s/pounds and d/pounds. Interesting, metal-cornered cursor that wraps around to bottom-edge scales. Equivalents on the back. White laminate on pearwood. Black, two-piece slide box. Everything in very good condition.

153. Faber-Castell 1/28 --- New, 10 inch Super Business, rule, with case. Scales: K, DF [CF, CI, C] D, A, and, on the back of the slide, [LL1, LL2, C]. On the top beveled edge, 27 cm and L. On the bottom edge, sh/d and Pounds Sterling. Conversions and equivalents on the back. White laminate on mahogany. Clear and green, hard-plastic case with flip end. Everything new. Rule still sealed in plastic sleeve. (Another, used, available.)

154. Faber-Castell 1/38 --- 10 inch rule in case. Scales: ?, A [B, CI, C] D, ?, and, on the back of the slide, [L, ?, ?, ?]. 27 cm scale on the top beveled edge. On the bottom edge, sin, cos, tg, ctg. Tables on the back. White laminate on pearwood. Very good condition. Interesting, metal-cornered cursor that wraps around to bottom-edge scales. Two-piece slide case.

155. Faber-Castell 1/54 --- 10 inch rule in case. Scales: 27 cm, L (top beveled edge)/ K, A [B, CI, C] D, P/ S, T (bottom edge), and, on the back of the slide, [LL1, LL2, LL3]. White laminate on pearwood. Cursor wraps around both edges. 1/54 Darmstadt. Clear and green hard plastic slide box. Everything in very good condition. (Others, with variations, available.)

156. Faber-Castell 1/54 Instructions --- Instruction manual for FC 1/54. 32 pages. Complete, but in delicate condition.

157. Faber-Castell 1/60 --- 10 inch Standard Trig rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 30 cm scale on the bottom edge. Equivalents on the back. White laminate on mahogany. In clear and green, hard plastic case/box. Very good condition.

158. Faber-Castell 1/60/360 --- 10 inch rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [cos, lg, tg]. 10 inch scale on the top beveled edge. 29 cm scale on the bottom edge. Continuation to 59 cm scale in the slide well. Marked D.R.G.M. Metal-framed cursor labeled Made in Bavaria. Rule in good condition, just slight discoloration and fading. Two-piece slide case is worn. (Others available.)

159. Faber 1/87 --- Excellent 10 inch A. W. Faber, Castell, Syst. Rietz. Scales: K, A [B, CI, C] D, L, and, on the other side of the slide, [S, ST, T], marked. 27 cm scale on the beveled, top edge, and a 1:25 scale on the bottom edge. Tables in German on the back. White laminate on mahogany. Excellent condition. Green cardboard, two-piece slip box. (Several others, with variations, available.)

160. Faber 1/87/387 --- 10 inch A. W. Faber, Castell, Syst. Rietz., in case. Scales: K, A [B, CI, C] D, L, unmarked, and, on the other side of the slide, [sin, cos, sin/tg, tg], marked. 27 cm scale on the top beveled edge, continued to 60 cm in the slide well, and a 1:25 scale on the bottom edge. Tables in German on the back. White laminate on pearwood. Unusual wrap-around cursor. Very good condition. Two-piece slide box.

161. Faber-Castell 1/92 --- Excellent 10 inch Log Log rule in box/case with instructions. Scales: LL2, A [B, CI, C] D, LL3, and, on the other side of the slide, [S, L, T]. K scale on the bottom edge. Wrap-around cursor. 10 inch scale on the top beveled edge. Dynamo and Volt scales in the slide well. Properties of metals and a wide variety of formulae on the back. White laminate on mahogany. Instruction manual. Clear and green plastic case/box. Case is in good condition as are the instructions. The rule itself is excellent.

162. Faber-Castell 1/98 --- Excellent 10 inch Elektro rule in box/case. Scales: LL2, A [B, CI, C] D, LL3, and, on the other side of the slide, [cos, lg, ctg]. K scale on the bottom edge. Wrap-around cursor. Dynamo and Volt scales in the slide well. 27 cm scale on the top beveled edge. Properties of metals and a wide variety of formulae on the back. White laminate on pearwood. Green cardboard case/box. Everything in very good condition. (Others available.)

163. Faber-Castell 2/82 --- New in case, 10 inch Duplex rule with instructions, equivalents rule, and case. Scales: L, T1, T2, A [B, BI, CI, C] D, ST, S, P, and, on the other side, LL03, LL02, LL01, K [K', C, CIF, CF] DF, LL1, LL2, LL3. White plastic with metal end plates. Instructions in German (English copy available). Separate plastic equivalents rule. Clear and green clam-shell case. (Others, used and almost new, available.)

164. Faber-Castell, Instructions for Use of the Castell-Duplex 2/82 Precision Slide Rule --- 17 page, 8X6 inch, beige and green, softcover manual. With picture of the 2/82 rule. Good condition.

165. Faber-Castell 2/82N --- New in case, 10 inch Duplex rule with instructions and separate equivalents rule. Scales: T1, T2, L, A [B, BI, CI, S', C] D, S, ST, P, and, on the other side, LL03, LL02, LL01, K, DF [CF, K', CIF, CI, C] D, LL1, LL2, LL3. Heavy white plastic. Clear and green plastic clamshell case. Instructions in German. Separate plastic equivalents rule. Everything is new; however there are some scuff marks on the case and a very, very slight amount of color bleeding on a few of the scales.

166. Faber-Castell 2/83 --- New in case, 10 inch Novo-Duplex rule with clamshell case, instructions, and separate equivalents rule. Scales: K, T1, T2, DF [CF, CIF, CI, C] D, S, ST, P, and, on the other side, LL03, LL02, LL01, W2 [W2', L, C, W1'] W1, LL1, LL2, LL3. Instructions in German. Separate plastic equivalents rule. Clear and green plastic clamshell case. Though everything is new, there is some slight discoloration on the rule and case. This does not interfere with use, only with cosmetics. (Others available.)

167. Faber-Castell 2/83N --- New in case, 10 inch, Novo-Biplex rule with case and instructions. Scales: T1, T2, K, A, DF [CF, B, CIF, CI, C] D, DI, S, ST, P, and, on the other side, LL03, LL02, LL01, LL00, W2 [W'2, CI, L, C, W'1] W1, D, LL0, LL1, LL2, LL3. Heavy white plastic with clamshell case. Instruction manual. All new. (Others available.)

168. Faber-Castell 4/22 --- New, 20 inch, Disponent rule in case. Scales: Various British and American weights and measures, DF [CF, CI, C] D, L, and, on the back of the slide, [LL1, LL2, C]. 50 cm scale on the top beveled edge. Sh/d and British pounds on the bottom edge. Instructions and equivalents on the back. White laminate on mahogany. Still in original plastic sleeve. Two-piece, green slide case. Everything new.

169. Faber/Castell 4/87 --- 20 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 50 cm scale on the top beveled edge 1:25 scale on the bottom edge. Equivalents on the back. White laminate on pearwood. 3 inch wide cursor. Very good condition, just one very tiny crack in the laminate. Green, two-piece slide case, worn.

170. Faber 51/91 --- Excellent 10 inch rule in slide box. Scales: A [B, C] D, and, on the back of the slide, [sin, lg, tg]. White laminate on pearwood (?). Black slide box, A.W. Faber 51/91 in very good condition, except one end missing. Rule in excellent condition. (Another available.)

171. Faber-Castell 52/80 --- New in box, 10 inch Mentor rule, with supplemental rule, instructions, case, and box. Scales: A, K/Z, DF, [T, CF, CIF, p%, CI,T, C] Z, D, K, and, on the other side, instructions [Z', N'] N, Z. Instructions in German. Green and white, two-piece, plastic slide box. Separate values rule. Outer box. Everything new. (Others, new and used, available.)

172. Faber-Castell 52/81 --- Essentially new in box, 10 inch Novo-Mentor rule with instructions, case, and box. Scales: A, K/Z, DF [T, CF, CIF, p%, CI, T, C] Z, D, K, and, on the other side, L, T1, T2 [S', CI, C] D, S, ST. White plastic with green end pieces and green highlighted scales. Instructions in German. Gray, two-piece, plastic slide case. Green outer box. Very slight color bleeding on some of the scales. Essentially new.

173.Faber-Castell 52/82 D-Stab --- New in box, 10 inch rule, with separate equivalents rule, hard plastic slide case, instructions, and outer box. Scales: L, K, A [B, CI, C] D, LL1, LL2, LL3, and, on the other side, T1, T2, DF [CF, CIF, CI, C] D, S, ST, P. White plastic with dark green end pieces and light green highlighted scales. Separate thin plastic rule with equivalents and 25 cm and 10 inch scales. Instructions in Germanic language (not German). Gray hard plastic slip case, marked Faber-Castell. Outer box green, black, and white. A very nice, brand new set. (Others, new and used, available.)

174. Faber-Castell 52/82 D-Stab (Different scales) --- 10 inch rule in hard plastic slide case. Scales: L, K, A [B, BI, CI, C] D, LL1, LL2, LL3, and, on the other side, T1, T2, DF [CF, CIF, S', C] D, S, ST, P. White plastic with dark green end pieces and light green highlighted scales. Green and ivory hard plastic slip case, marked Faber-Castell. Rule, excellent. Case, very good. With separate symbol sheet, copyright 1971.

175. Faber-Castell 57/22 --- 10 inch rule in clear, hard-plastic slide case. Scales: Conversion Markings, DF [CF, CI, C] D, L, and, on the back of the slide, [LL1, LL2, C]. 27 cm scale on top beveled edge. Marked: A.W. Faber Castell, 57/22, Disponent Schul Rechenstab, Made in Germany. White plastic. Dirty, as is the case.

176. Faber-Castell 57/86 --- New in box, 10 inch Columbia rule, in case, with instructions. Scales: A [B, C] D. 27 cm scale on the top beveled edge. Instructional diagrams on the back. Copyright 1962. White plastic. Gray plastic, two-piece slip case. Instructions in Norwegian (?). Green, black, and white outer box. Everything new. (Others, new and used, available.)

177. Faber-Castell 57/87 (Switzerland) --- 10 inch rule in case and box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, S, ST, T. 27 cm scale on the top beveled edge. White plastic with blue scale highlights. Marked: A.W. Faber-Castell, 57/87 Rietz, Made in Switzerland. Very good condition -- owner's name in slide well. Cardboard slip case has been covered and decorated. (Another available.)

178. Faber-Castell 57/87 --- Almost new, 10 inch rule in case and box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, S, ST, T. 10 inch scale on the top beveled edge. White plastic with blue scale highlights. Marked: Rietz Schul-Rechenstab. Very good condition. Clear plastic slip case. Green and black outer box has shelf wear. (Others, with variations, available.)

179. Faber-Castell 57/88 --- 10 inch, Rietz N, in case with instructions. Scales: K, A [B, L, CI, C] D, S, ST, T1, T2. 27 cm scale on the top beveled edge. White plastic with green scale highlights. Name on the back. Gray two-piece slide box. Instructions in German. Everything in very good condition. (Others available.)

180. Faber-Castell 57/89 --- New in box, 10 inch Log Log rule with case and separate equivalents rule. Scales: K, A [B, L, CI, C] D, S, ST, T1, T2, and, on the back of the slide, [LL2, S', LL3]. 27 cm scale on the top beveled edge. White plastic with green scale highlights. Green and ivory, two-piece, hard plastic slide case. Separate plastic equivalents rule. Outer box. Everything new. (Another, used, available.)

181. Faber-Castell 62/82 --- 5 inch rule in case. Scales: L, T1, T2, A [B, BI, CI, C] D, ST, S, P, and, on the other side, LL03, LL02, LL01, K [K', C, CIF, CF] DF, LL1, LL2, LL3. White plastic with green highlighted scales and metal end pieces. Almost new, just a little discoloration on the scales. Green leather slip case. (Others available.)

182. Faber-Castell 62/82N --- New in box, 5 inch rule in case with instructions and box. Scales: T1, T2, L, A [B, BI, CI, S', C] D, S, ST, P, and, on the other side, LL03, LL02, LL01, K, DF [CF, K', CIF, CI, C] D, LL1, LL2, LL3. White plastic with green scale highlights. Very, very slight color bleeding. Instructions in German. Green leather slip case. Outer box. Everything new.

183. Faber-Castell 62/83 --- New in box, 5 inch Novo-Duplex rule with case, instructions, and box. This is the 5 inch version of the F/C 2/83. Scales: K, T1, T2, DF [CF, CIF, CI, C] D, S, ST, P, and, on the other side, LL03, LL02, LL01, W2 [W2', L, C, W1'] W1, LL1, LL2, LL3. White plastic with green highlighted scales. Green leather slip case. Instructions in Norwegian (I think). Green, black, and white outer box. Everything new. (Others available.)

184. Faber-Castell 62/83N --- New in box, 5 inch, Novo-Duplex rule with case, instructions, and box. Same scales as the 2/83N, 10-inch rule: T1, T2, K, A, DF [CF, B, CIF, CI, C] D, DI, S, ST, P, and, on the other side, LL03, LL02, LL01, LL00, W2 [W'2, CI, L, C, W'1] W1, D, LL0, LL1, LL2, LL3. White plastic with green leather slip case. Instruction manual. Outer box. All new. (Others available.)

185. Faber-Castell 63/39 --- 5 inch rule in case. Scales: A [B, C] D. 14 cm scale on the top beveled edge. White laminate on mahogany. Slightly warped. Company name on the back. Brown leather flip-top case. (Another available.)

186. Faber-Castell 63/82 --- New in box, Biplex, 5 inch rule, with case, instructions, and box. Scales: L, T1, T2, A [B, BI, CI, C] D, S, ST, P, and, on the other side, LL03, LL02, LL01, K [K', C, CIF, CF] DF, LL1, LL2, LL3. White plastic with pink and yellow scale highlighting. Red end pieces. Black slide case. Instructions in Spanish. Everything, including the outer carton, is new. (Another available.)

187. Faber-Castell 63/83 --- New in box, Novo-Biplex, 5 inch rule, with case, instructions, and box. Scales: K, T1, T2, DF [CF, CIF, CI, C] D, S, ST, P, and, on the other side, LL03, LL02, LL01, W2 [W2', L, C, W1'] W1, LL1, LL2, LL3. White plastic with pink and yellow scale highlighting. Red end pieces. Black slide case. Instructions in Spanish. Everything, including the outer carton, is new. (Another available.)

188. Faber-Castell 63/91 --- 5 inch rule with case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 14 cm scale on the top beveled edge. White laminate on mahogany. Slightly warped. Company name on back. Brown leather slip case.

189. Faber-Castell 67/21 (Steel-Concrete) --- New in box, 5 inch steel-concrete rule with case and instructions. Scales: L, K, A[ B, CI, C] D, P, S, T, and, on the back of the slide, [B, plus two special scales]. Also, special scales and chart on the back of the rule. White plastic. Green leather slip case. Instructions in Spanish. Outer box is worn, but everything else is new.

190. Faber-Castell 67/22 --- 5 inch Disponent rule in case. Scales: DF [CF, CI, D], and, on the other side of the slide, [sh/d, British Pounds]. White plastic. Almost new, with just some slight yellowing on one end. Green leather slide case.

191. Faber-Castell 67/54 --- 5 inch Darmstadt rule with case. Scales: L, K, A [B, CI, C] D, P, S, T, and, on the back of the slide, [LL1, LL2, LL3]. 14 cm scale on the top beveled edge. White plastic. Very nice brown leather flip-top case. Rule and case in very good condition.

192. Faber-Castell 67/54b --- New in box, 5 inch Darmstadt rule with case, instructions, and box. Scales: L, K, A [B, CI, C] D, P, S, T, and, on the back of the slide, [LL1, LL2, LL3]. 5 inch scale on the top beveled edge. 14 cm scale on the back. White plastic. Green slip case. 27-page manual. Green, black, and white outer box. Everything new. (Others available.)

193. Faber-Castell 67/54b --- New in box, 5 inch rule in case with instructions. Scales: L, K, A [B, CI, C] D, P, S, T, and, on the other side of the slide, [LL1, LL2, LL3]. 14 cm scale on the top beveled edge. White plastic. Green leather slide case. Instructions in German. Outer box. Everything new. Slight color bleeding. (Others, new and used, available.)

194. Faber-Castell 67/87 --- New in box, 5 inch Rietz rule in green case with instructions and box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 5 inch scale on the top beveled edge. White plastic. Green slip case. 23-page manual. Green, black, and white outer box. Everything new. (Others, new and used, available.)

195. Faber-Castell 111/22 --- 10 inch Disponent rule in wooden, clamshell, pin-lock case. This is a special business rule. Scales: DF [CF, CI(Val.), C(E)] D(V), L, and, on the bottom edge, s and d, and pounds sterling. On the top of the face are markings for various weights and measures, both U.S. and British. 27 cm scale on the top, beveled edge. Equivalents and instructions on the back. White plastic. Very good condition. The case is very interesting: Green covered wood, clamshell, with two pin locks and velvet interior. Some scuffs and on the green covering, but, otherwise, solid.

196. Faber-Castell 111/54 --- New, 10 inch Darmstadt rule with case. Scales: K, A [B, CI, C] D, P, S, T, and, on the back of the slide, [LL1, LL2, LL3]. 10 inch scale on the top beveled edge. L scale on the bottom edge. Instructional diagrams on the back. White plastic. Clear plastic slip case. Everything new. (Others, new and used, available.)

197. Faber-Castell 111/87 --- New in case, 10 inch rule with instructions and separate equivalents rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 27 cm scale on top beveled edge. White plastic. Clear and green plastic clamshell case. Instructions in German. Separate plastic equivalents rule. Everything new. (Another available.)

198. Faber-Castell 111/87A --- 10 inch Rietz rule with Addiator on the back plus case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 27 cm scale on top beveled edge. White plastic. Large Addiator on the back. Green slide case. Everything in very good condition.

199. Faber-Castell 157/87 --- New in case, 10 inch Rietz rule with instructions and case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 27 cm scale on the top beveled edge. White plastic. 17 page manual. Clear and green plastic slip case. Everything new.

200. Faber-Castell 157/89 --- Brand new, 10 inch Castell Log-Log rule in case, with instructions. Scales: K, A [B, L, CI, C] D, S, ST, T1, T2, and, on the back of the slide, LL2, S', LL3. A 27 cm scale on the top beveled edge. Wide cursor with five indicator lines. Rule is white plastic. Ivory-colored, hard plastic slip case. Instructions, in Dutch. Everything is brand new. A beautiful set.

201. Faber-Castell 167/87 --- 5 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 5 inch scale on the top beveled edge. White plastic. Very good condition. Green slide case slightly worn. (Another available.)

202. Faber-Castell 360 --- Excellent 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale in the top beveled edge. 29 cm scale on the bottom edge. White laminate on pearwood. D.R. Patent No. 206428. Equivalents on the back. Excellent condition. Black, two-piece slide box. (Others, with variations, available.)

203. Faber-Castell 361 --- 10 inch rule in case. Scales: A [B, C] D. 10 inch scale on top beveled edge. 27 cm scale on the bottom edge. White laminate on pearwood. No cursor. Equivalents in English on the back - some label wear. Very good condition. Partial case only. (Another available.)

204. Faber-Castell 375 --- 10 inch rule in case. Scales: K, A [B, C] D, L, and, on the other side of the slide, [S, S&T, T]. 10 inch scale on the top beveled edge. 28 cm scale on the bottom edge. Equivalents on the back. White laminate on pearwood. Heavy metal-framed cursor. Rule marked D.R.Patent No. 206428. Made in Bavaria. Very good condition. Two-piece black slide box worn, but solid and marked with original labeling. (Others, with variations, available.)

205. Faber-Castell 378 --- 10 inch rule in box. Made in Bavaria. Scales: LL2, A (KW) [B (HP), C] D, LL3, and, on the back of the slide, [S, L, T]. In the slide well: Dynamo, Volt. 27 cm scale on top beveled edge. 10 inch scale on the bottom edge. Heavy metal-framed cursor with multiple lines. Metal U bracket at one end of the slide. White laminate on pearwood. Very good condition. Two-piece black slide box with some tape and wear.

206. Faber-Castell 392 --- 10 inch rule. Made in Bavaria. Scales: LL2, A [B, CI, C] D, LL3, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. K scale on the bottom edge. Heavy metal cursor. White laminate on pearwood. Equivalents etc. on the back. Owner's name on back and a small piece of laminate missing on one end of the back of the slide. Otherwise, very good condition.

207. Faber-Castell 397 --- Beautiful, essentially new 5 inch rule in box. Scales: K. A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 5 inch scale on the top beveled edge. 16 cm scale on the bottom edge. White laminate on pearwood. Heavy-framed metal cursor. Equivalents on the back. Made in Bavaria. Black slide box, marked A.W. Faber, D.R.P., shows wear, but the beautiful rule is essentially new.

208. Faber-Castell Instructions, 67/ Series --- 11-page instruction manual for the 67/ series rules. In German. Very good condition.

209. Faber Catalog and Instructions --- Catalog and Instructions for the Use of A.W. Faber Castell Calculating Rules. 44-page manual, 6 x 8 inches. The catalog section has information on the following rules: 389, 369, 380N, 363, 361, 345, 386, 375, 397, 387, 385N, 392, 382, 379, 378, 319, 398, 388N, 373, 372, 353, 362, 397c, 391, 321, and 394, plus information on demonstration rules, both 4 and 7 foot, 336, 337, 315, 334, and 304. Following this catalog information, the manual contains the following sections: Instructions for the Use of the Regular Scales, The Cube Scale - CU, Cube Root, Cubes and Cube Roots, The Log-Log Scale, Instructions for the Use of the Three Line Cursor, The Efficiency Scale, Pressure Drop Scale, Instructions for the Use of Three-Lined Cursor - Cursor for 2 Unequal Constants, Instructions for the Use of the Special "Hohenner" Scale, Faber-Castell Precision Calculating Rules for Advertisements, Cursors, Magnifying Cursor No. 2, and Magnifying Cursor No. 1 (very interesting). The manual has a few tears and folds, but is basically complete and in very useable condition. It also has photographs of the Faber Manufactory of Pencils, Stein near Nuremberg, and the Manufactory of Calculating Rules, Geroldsgruen.

210. Farmar's Rule --- 20 x 2 5/8 inches, The Standard Slide Rule for the Entire Wine & Spirit Trade. White laminate on mahogany. Marked: By Royal Letters Patent and A 15th Edition Guide-Book. Serial # 5655. F.C. Farmar, 10 Gloucester Terrace, Thorpe Bay, Essex. 3/16 inches thick. Single-sided cursor. Grooved bottom edge. Excellent condition.

211. Farmar's Rule --- 20 x 2 7/8 inches, The Standard Slide Rule for the Entire Wine & Spirit Trade. White laminate on mahogany. Marked: By Royal Letters Patent and A 16th Edition Guide-Book. F. C. Farmar. 5/16 inches thick. Duplex cursor. Excellent condition.

212. Farrow & Jackson Boxwood Proof Rule --- 9 inch boxwood proof rule. Farrow & Jackson, London. Brass end. Very good condition, just a small sliver off the end of the slide.

213. Fat/Calorie Circular Rule --- 4 1/2 inch (diameter) light plastic circular rule. Everything in German. Appears to for calculating fat/calorie relationships.

214. Fedra Technicus 65 --- 10 inch rule with case and instructions. Scales: LL01, LL02, LL03, A [B, L, K, C] D, LL3, LL2, LL1, and, on the other side, T, ST, DF [CF, CIF, CI, C] D, P, S. White plastic with green slide and end pieces. Heavy-duty. Very good condition. Instructions in German, Two-piece gray slide box.

215. Flying Fish 1016--- Very unusual, new in box, 10 inch Flying Fish, Log-Log Duplex Slide Rule for Ventilating Duct, made in Shanghai. Box/case and instructions. Scales: (Kv), Kv sigma ?, Dq, b [a, Z, v, Hm, F, D] Q, G, degrees F, degrees C, and, on the other side, LL01, LL02, LL03, A [B, T, L, CI, S, C] D, LL3, LL2, LL1. White plastic with beige end pieces and cursor guides. Brown, two-piece slide box/case. Instructions in Chinese and English. (Another available.)

216. Flying Fish 1205 --- New, 4 1/2 inch rule in case. Scales: T, K, A [B, L, CI, C] D, S, SRT. 5 inch and 12 cm scales on the back, along with formulas in both English and Chinese. White plastic. Clear case. (Another available.)

217. Fowler's Textile Circular Calculator, Magnum --- 4 1/2 inch diameter, circular slide rule/calculator, in case. Metal body. Glass front. Marked: Fowler's Textile Calculator, Magnum, Patent, Fowler & C., Manchester. Several scales including Welft, Looms, Reeds. Two turning knobs. Very good condition. Brown leather, flip-top, snap case shows a little wear. But the instrument itself is very nice, but could use a little cleaning.

218. Fowler's Textile Circular Calculator, Type B --- 3 1/2 inch diameter, circular slide rule/calculator, in case. Metal frame. Glass front. Red-brown plastic back. Marked: Fowler's Textile Calculator, Type B, Patent, Fowler & C., Manchester, and on the back, Fowler's Calculator, The World's Best. Serial # 668. Several scales including Welft, Looms, Reeds. Two turning knobs. Very good condition. Brown leather, flip-top case shows a little wear and is missing the hold-down strap for the top. But the instrument itself is very nice.

219. Fractionier --- 10 inch metal slide rule designed to add and subtract fractions and convert them to the thousandth. Consists of two metal sliding parts and a plastic cursor. Numbers are engraved in the metal. Made by the Pittsburgh Stencil & Tool Co. With instructions and original box. Very good condition.

220. Fuji 208 --- New in box, 10 inch Electro rule with case. Scales: K, E (Volt, Dynamo), A [B, CI, C] D, LL3, LL2, L, and, on the back of the slide, [S, ST, T]. White plastic with green slide. Green and white, two-piece, hard plastic case. Silver and green outer box. Everything new.

221. Fuji 515P --- 5 inch TriLog rule in case. Scales: LL2, LL3, A [B, CI, C] D, K, LL1, and, on the back of the slide, [P, T1, L, S]. 13 cm scale on the top beveled edge. White plastic with green slide, Black slide case. Everything in very good condition.

222. Fuji 552P --- Excellent 5 inch, Duplex Log/Log rule in case. Scales: LL-0, K, A [B, T, S, C] D, P, L, LL0, and, on the other side, LL-1, LL-2, LL-3, DF [CF, CIF, CI, C] D, LL3, LL2, LL1. White plastic with green slide. Black slip case. Almost new.

223. Fuji 553P --- New in case 5 inch, Duplex Log/Log rule in case. Scales: LL-1, LL-2, LL-3, A [B, L, K, C] D, LL3, LL2, LL1, and, on the other side, T1, T2, DF [CF, CIF, CI, C] D, P, S, ST. White plastic with green slide. Black slip case. New. (Others, new and used, available.)

225. German Artillery Rule --- Very nice 15 inch rule in case. Various artillery-related scales - in German. 36 cm scale on the bottom edge. Heavy white plastic. Nicely made. Metal-frame glass cursor is 5 inches long. Instructions (in German) on the back. Two-piece, black slide case. Both the rule and case are in very good condition. An exceptionally nice rule of its type.

226. German Rule --- 10 inch rule in case. Scales: A [B, C] D. 10 inch scale on the top beveled edge. 26 cm scale on the bottom beveled edge. White laminate on mahogany. Heavy metal-framed cursor. Black, two-piece slide case. Everything in very good condition. A very nicely made rule.

227. Gilson Binary --- 8 1/4 inch Gilson Binary Circular rule. 1931/1940 copyrights. White metal. Case. Very good condition, just some slight surface marks.

228. Gilson Binary Circular --- 8 1/4 inch circular, The Binary Slide Rule, Made in U.S.A. Multiple scales on both sides. One cursor on one side and two on the other. Blue with yellow scale highlights on metal. Some distress to the scales on both sides, but just cosmetic -- does not interfere with use.

229. Gilson Midget Circular --- 4 1/4 inch midget circular rule. No case. Multiple scales on both sides. One cursor on one side, two on the other. Light blue on metal. Made in U.S.A. Some finish chipped from outside edges. Needs a little clean-up. An OK rule. (Another available.)

230. Graphoplex 612 --- New in case, 5 inch rule, with instructions. Scales are marked: B3, B2 [b2, a, b] B, L (really: K, A [B, CI, C] D, L) and, on the back of the slide, [S, S&T, T]. 13 cm scale on the top beveled edge. Company name on back. Instruction sheet in French. Tan, leather slip case.

231. Graphoplex 620 --- New in case, 10 inch rule. Scales: K, A [C, CI, C] D, L, and, on the other side of the slide, [SRT, S, T<45, C]. White plastic in gray plastic case. New.

232. Graphoplex 620 d --- Essentially new in case, 10 inch Rietz rule. Scales: K, A [C, CI, C] D, L, and, on the other side of the slide, [S, cos., S&T, T, ctg]. White plastic in red plastic case. Essentially new.

233. Graphoplex 640 --- New in case, 10 inch rule. Scales: L, P, A [B, K, CI, C] D, LL3, LL2, LL1, and, on the back of the slide, [SRT, S, T, C]. 27 cm scale on the top beveled edge. Flip-top case has a tear, but the rule is new.

234. Graphoplex 1600 --- New in box, 10 inch rule in case and box. Scales: L, T, A [B, K, CI, C] D, S, ST, T. 27 cm scale on the top beveled edge. White plastic with blue scale highlights. Red plastic, two-piece slide case. Separate equivalents rule. Outer box is crunched, but the rule and case are new.

235. Graphoplex 1614 --- New in box, 10 inch rule with case, separate equivalents rule, and instructions. Scales: LL2, LL3, L, A [B, K, CI, C] D, S, ST, T. 27 cm scale on the top beveled edge. White plastic. Made in France. Gray plastic, two-piece slide case. Instructions in Dutch. Everything new.

236. Graphoplex 1614 --- New in case, 10 inch rule with case and instructions. Scales: LL2, LL3, L, A [B, K, CI, C] D, S, ST, T. 27 cm scale on the top beveled edge. White plastic. Made in France. Red plastic, two-piece slide case. Instructions in French. Everything new. (Others available.)

237. Graphoplex 1694 --- New in box, 10 inch rule with case, instructions, equivalents rule, and outer box. Scales: P, K, A, DF [CF, L, CI, C] D, S, SRT, T. 27 cm scale on the top beveled edge. White plastic. Made in France. Separate equivalents rule. Red plastic, two-piece slide case. Instructions in French. Outer box. Everything new. (Others available.)

238. Guedon Metal Pocket Rule --- 5 inch metal rule in case. Scales: A [B, CI, C] D. Fraction/decimal equivalents on the front, under the fixed sections. 5 inch and 12 cm scales on the back. Made of thin, but non-flexible metal, painted white. Marked: Guedon, Camden, New Jersey; Made in U.S.A. Perhaps made by Richardson. The black leather slip case is worn, but the rule is in very good condition.

239. Guedon Miniature --- 5 inch metal rule with instructions and case. Scales: A [B, C] D. 12 cm and 5 inch scales on the back. Guedon, Camden, New Jersey. White on sheet steel. Black slip case. Both in good condition. Instructions are torn.

240. Gunther Rule --- 12 inch boxwood rule, 2 inches wide with multiple scales on both sides. A small sliver out of one edge, some letters scratched in, and some other random scratches. Better than it sounds.

241. Helix A102S --- 10 inch Top Precision rule in case. Scales: K, S, A [B, CI, C] D, T, L. White plastic with green slide. Flexible plastic case. Very good condition.

Hemmi --- See, Sun Hemmi.

242. HH Universum --- 7 1/2 inch rule. Scales: K, A [B, CI, C] D, L, and, on the other side of the slide, [S, T]. 20 cm scale on the top beveled edge. 1:25 scale on the bottom beveled edge. White laminate on pearwood. Yellowed. Equivalents on the back.

243. Hohen Neuendorf --- 7 1/2 inch rule with case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, T]. White laminate on oak (really, oak). Equivalents, worn, on the back. The S, T scale is on a brass plate. Fabric case. Good condition.

244. Hono Reitz 300 --- New in box, 10 inch rule. Scales: L, K, A [B, CI, C] D, S, ST, T. Interesting green plastic. Green, two-piece slide box. New. (Others, new and used, available.)

245. Hughes Owens 1762 --- 5 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 5 inch scale on the top beveled edge. White laminate on bamboo. Marked: The Hughes Owens Co. Limited, No, 1762. Sun Hemmi, Made in Occupied Japan. Rule in good condition. Brown leather flip-top case, marked The Hughes Owens Co., Ltd. 1762; very good condition -- just a few slight scrapes.

246. Hughes Owens 1768 --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. Made by Sun Hemmi. White on bamboo. Equivalents on back. Black flip-top case. Good condition.

247. Hughes Owens 1771 --- 10 inch rule, no case, no cursor. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on top, beveled edge and 27 cm scale on bottom edge. No cursor. Rule in poor shape -- yellowed, crazed, chipped, scratched, and dirty.

248. Hughes-Owens 341 3425 --- 5 inch rule, made by Sum Hemmi, in case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 5 inch scale on the top beveled edge. White laminate on bamboo. Rule in very good condition, just slightly dirty (cleanable). Brown leather flip-top case, marked Hughes-Owens, in good condition, some wrinkles.

249. Indeco --- 5 inch rule, leather case and instructions. Scales: A [B, C] D. Plastic scales in a narrow (1 inch) metal frame. Marked: Indeco Rule. Very good condition. Brown leather slip case, solid, but some wear marks. (Another available.)

250. Iwa 5125 --- 5 inch rule in a special notebook case. Scales: K, A [B, CI, C] D, sin, sin/tg, tg. White plastic, semi flexible. Fits into a 6 1/2 inch X 4 1/2 inch, pocket-size notebook (included) that has a slot for the rule and one for a pen or pencil. An A.W. Faber Castell mechanical pencil is included. Several sheets of 6-ring graph paper are included as well. Everything is in very good condition.

251. Jakar 1005 --- 10 inch rule with separate equivalents rule and case. Scales: S, K, A [B, CI, C] D, L, T. White plastic with a blue plastic slide. Very good condition. Separate white plastic equivalents rule. Good condition. Clear plastic case, split. (Another available.)

252. Jason 802 --- 10 inch rule in brown leather flip-top case. Scales: LL0, LL00, A [B, K, CI, C] D, S, ST, T, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. White laminate on bamboo. Marked: Jason No. 802, Made in Japan. Frameless plastic cursor. Rule in very good condition. Brown leather flip-top case, marked Jason, is in very good condition, just a few rubs and an owners initials.

253. Kaufmanns 1001 System Klawun --- 10 inch rule in case. Marked: Der Rechenstab des Kaufmanns, System Klawun, No. 1001 / J Feinmessinstitut Klawun Berlin - Charlottenburg 5. Scales: KZ [T, Val., p%, E, T] V, Z, and, on the back of the slide, [sh/d, British Pounds, lg]. White laminate on mahogany. Very good condition - name lightly inscribed on the back. Black, two-piece slide case.

254. Kaufmanns 1001/H System Klawun --- 10 inch rule in case. Marked: Der Rechenstab des Kaufmanns, System Klawun, No. 1001/H Feinmessinstitut Klawun Hannover. Scales: Kapital Zinsen [Tage, Kehrwarte/%, Einkauf/Tage] Verkauf/Zinsen, and, on the back of the slide, [sh/d, British Pounds, lg]. White laminate on pearwood. Very good condition. Blue, two-piece case.

255. Kaufmanns 1001/J System Klawun --- 10 inch rule in case. Marked: Der Rechenstab des Kaufmanns, System Klawun, No. 1001/J Feinmessinstitut Klawun Hannover. Scales: KZ [T, Val., p%, E, T] V, Z, and, on the back of the slide, [sh/d, British Pounds, lg]. White laminate on pearwood. Good condition.

256. Kaufmanns 1001/S System Klawun --- 10 inch rule in case. Marked: Der Rechenstab des Kaufmanns, System Klawun, No. 1001/S Feinmessinstitut Klawun Hannover. Scales: KZ [T, Val., p%, E, T] V, Z, and, on the back of the slide, [sh/d, British Pounds, lg]. 27 cm scale on the top beveled edge. White laminate on pearwood. Instructions in German on the back. Very good. Black, two-piece slide case.

257. Kazet 14 --- 10 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, T]. 25cm scale on the top beveled edge. 1:25 scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Two-piece black slide case. Good condition.

258. Kelco Trot Calculator for Harness Race Horses --- 10 X 4 inch, very heavy white plastic rule with case and instruction manual. Very good condition. Single slide and cursor. Copyright 1969. 19-page manual plus separate example sheets. Red and clear plastic case/pouch.

259. Kent 7153 --- 10 inch rule in case. Scales: L, K, A [B, CI, C] D. S, ST, T. On the back, 25 cm and 1/20 inch and 1/32 inch scales. White plastic with some yellow scales. Green, two-piece slide case with owner's names. Good condition.

260. Kent 7153LL --- 10 inch rule in case. Scales: L, K, A [B, CI, C] D. S, ST, T, and, on the back of the slide, [S, LL2, LL3]. On the back, 25 cm and 1/20 inch and 1/32 inch scales. White plastic with some blue scales. Green, two-piece, plastic slide case. Very good condition. (Others available.)

261. K+E 1 W Cursor Box --- A new box for a K+E duplex, frameless cursor, with a used cursor (chipped glass) inside.

262. K+E 68 2233 Duplex Magnifier --- New in box, K+E 68 2233 (old 4185-17) Slide Rule Magnifier. Duplex. Green slide box. Chamois wrapped.

264. K+E Mannheim Slide Rule --- 10 inch rule. No model number. Heavy metal cursor. Case. Scales: A [B, C] D (not marked) and, on the other side of the slide, [S, L, T]. White paint on mahogany. Equivalents on the back. Heavy metal cursor. Very good condition.

265 K+E Mannheim Slide Rule --- 10 inch rule. No model number. Heavy metal cursor. Case. Scales: A [B, C] D (not marked) and, on the other side of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 26 cm scale on the bottom edge, continued to 52 cm in the slide well. White laminate on mahogany. Equivalents on the back. Cursor marked Keuffel & Esser Co, New-York.

266. K+E Short Base Triangulation Slide Rule --- 20 inch rule. Scales: Auxiliary Angle "A", Mils [Vertex Angle "t", Mils; Base "b"] Range "R", and, on the back of the slide, {Vertex Angle "t", Mils; Base "b". White laminate on mahogany. Cursor has two lines, one for meters, one for yards. Rule marked Short Base Triangulation Slide Rule, Keuffel Esser Co., U.S. The tan leather case (flip-top detached) is marked K+E Slide rule and U.S.

267. K+E 4035 --- 8 inch rule in case. Scales: A [B, C] D, all unlabeled, and, on the back of the slide, [S, L, T]. 8 inch scale on the top beveled edge. 20 cm scale on the bottom edge. White laminate on mahogany. Very small chip out of the mahogany and laminate on one corner. Light initials on the front. Otherwise, very good condition. Equivalents on the back. Brown leather, K+E, flip-top case is solid, with some worn spots and owner's name.

268. K+E 4041 --- 10 inch Mannheim rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 25 cm scale on the bottom edge. Serial # 135944. Equivalents on the back. White laminate on mahogany. Frameless cursor. Excellent condition. Black cardboard flip-top case/box -- top almost loose. (Another available.)

269. K+E 4045 --- 16 inch rule, with magnifier, in magnifier case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 16 inch scale on the top beveled edge. 41 cm scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Very good condition. Slight yellowing. Brown leather case with expansion for the magnifier. Flip top is present, but the hold-down strap is missing. Case is solid, but dirty. A rare and interesting set.

270. K+E 4051 --- 20 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 20 inch scale on the top beveled edge. 50 cm scale on the bottom edge. Serial # 531762. Patent 1,934,232. Equivalents on the back. Black cardboard case is missing the flip top. The rule itself is in very good condition, with just a little of the paper equivalents label on the back torn. (Others available.)

271. K+E 4053-2 --- 8 inch rule. Scales: A [B, CI, C] D, and, on the back of the slide, {S, L, T]. 8 inch scale on the top beveled edge. K scale on the bottom edge. White laminate on mahogany. Equivalents on the back. Pat. June 5, 1900. Very good condition. (Another available.)

272. K+E 4053-2 --- 8 inch rule, in case. Scales: A [B, CI, C] D, and, on the back of the slide, {S, L, T]. 8 inch scale on the top beveled edge. 20 cm scale on the bottom edge. White laminate on mahogany. Equivalents on the back. Pat. June 5, 1900. Serial # 307968. Excellent condition. Tan leather, flip-top case - very good, with a few marks.

273. K+E N4053-3 --- Almost new, 10 inch rule in case and box with care manuals. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 25 cm scale on the bottom edge. Frameless cursor. Serial # 370296. White laminate on mahogany. Equivalents on the back. Black, leather-covered, flip-top case/box. Green slide box. Booklet, How to Take Care of Your K&E Slide Rule Mannheim, included. Everything almost new. (Others, with variations, available.)

274. K+E Magnifier Case and Box for 4053-3 Size Rule --- Almost new, tan leather, K+E, flip-top, magnifier case in its original green slide box marked: K+E PM Leather Case for Slide Rule with Magnifier. Box shows some wear. Case is essentially new.

276. K+E N4053-5 --- Excellent, 20 inch rule in case and original box. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 20 inch scale on the top beveled edge. 50 cm scale on the bottom edge. White laminate on mahogany. Pat. 1,934,232. Serial # 770891. Equivalents table on the back. Excellent condition, as is the black leather flip-top case. The original green slide box is worn, but all there. (Others available.)

277. K+E 4055 --- 10 inch Beginner's rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. White laminate on mahogany. Equivalents on the back. Frameless cursor. Adjustment screws on the back. Serial # 166599. Patent June 5, 1900. Black cardboard slide box in good condition. Rule in very good condition. (Others available.)

278. K+E 4058 -- Nice, early(?), 10 inch, Student's Slide Rule, with box and instructions. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. Equivalents tables on the back. Thin plastic cursor needs a little tightening. Tan wood, no paint. Very good condition. Instructions, Elementary Instructions for Operating the Slide Rule, copyright 1909, have small tears on the top and bottom edges. The black, two-piece, slide case, marked in gold, Keuffel & Esser Co., Student's Slide Rule, is in very good condition.

279. K+E 4058C --- 10 inch, Beginner's Slide Rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. Equivalents on the back. Tan wood. Cursor glass chipped (will be replaced.) Very good condition. Black cardboard case. (Others available.)

280. K+E 4058W --- Like-new 10 inch Beginner's Slide Rule in black, cardboard, slide box, with instructions. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. White paint on bamboo?? Rule in like-new condition. Box is very good, with a few rubs and the covering coming a little loose at one end. Box marked, K&E Beginner's Slide Rule 4058 W. Instructions, Elementary Instructions for Operating the Slide Rule, Keuffel & Esser Co., New York, copyright 1928, are in excellent shape, just folded to fit in the box. A very nice set. (Others, with variations, available.)

281. K+E 4059 --- Uncommon, 8 inch, Beginner's Slide Rule. Scales: A, [B, C] D. Wood with irregular dark staining. Chip out of back. Equivalents on the back.

282. K+E 4070-3 --- Almost new, 10 inch rule in black leather case with manual and outer box. Scales: K, A [B, T, ST, S] D, DI, and, on the back, DF [CF, CIF, CI, C] D, L. Patent #s: 2,500,460; 2,168,056; 2,170,144. Serial # 930692. White laminate on mahogany. Has the edge strips of laminate like many of the 4081-3's. Very good condition. Black leather flip-top case, marked K+E, is essentially new. 88-page manual is new. The green outer box is damaged, but the rule and contents are very nice. (Others available.)

283. K+E 4070-3 with Magnifier --- 10 inch rule with magnifier, magnifier case, and original box. Scales: K, A [B, T, ST, S] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. Serial # 929373. White laminate on mahogany. K+E clip-on magnifier. The rule is in good condition. Tan leather case with expansion for the magnifier. The case is physically almost new, but has some names written on it. The green exterior slide box was the original box for the leather magnifier case. It is solid, but worn.

284. K+E 4070 Manual --- 5 inches x 8 inches. The Polyphase Duplex Trig Slide Rule No. 4070, a Manual. By Kells, Kern, and Bland. Copyright 1939. 90 pages. Orange cover. Good condition -- some dirt and staining on the cover. Contains pictures of the following K+E rules: 4070 Polyphase Duplex Trig, Royal Lance Electrical, Surveyor's Duplex, Stadia, Chemist's Duplex, Power Computing, Kurtz Psychrometric, and Ever-There 4097 C and 4097 D.

285. K+E 4071-3 --- 10 inch rule in tan, leather, flip-top case. Scales: K, A [B, T, ST, S] D, DI, and, on the back, DF [CF, CIF, CI, C] D, L. Rule patents: 1,930,852; 2,168,056; 2,170,144. Cursor patent # 2,086,502. White laminate on mahogany. Serial # 797289. Very good condition, just a little yellowing. The tan leather case, marked K+E Slide Rule, is in very good shape, except for some dirt marks and a little weakness at the flip-top hinge points. (Others available.)

286. K+E 4080-3 --- Excellent, 10 inch Log Log Duplex Trig rule in black leather case, with box. Scales: LL01, K, A [B, T, ST, S] D, L, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. White laminate on mahogany. Serial # 470265. Patent #'s: 1,930,852; 2,168,056; 2,170,144; 2,285,722. Excellent condition. Black leather flip-top case in very good condition. Original green slide box in excellent condition. Includes small brochure, How to Take Care of Your K&E Slide Rule, Duplex. (Others available, with variations, including one with a magnifier and magnifier case.)

287. K+E 4080-5 --- 20 inch rule. Scales: LL0, LL00, A [B, T, ST, S] D, DI, K, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. Serial # 135524. White laminate on mahogany. Very good condition - a little yellowing. (Cursor needs repair.) (Another available.)

288. K+E 4081-3 --- 10 inch rule, black, leather-covered, flip-top box/case. Scales: LL0, LL00, A [B, T, ST, S] D, DI, K, and, on the back, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. Rule patents: RE.20,984; 1,930,852; 2,168,056; 2,170,144. Serial#074071. Cursor patent: 2,086,502. Cracked cursor guides. White laminate on mahogany. Rule is very good. Box, case -- marked K+E, 4081-3S, Log Log Duplex Decitrig -- is like-new. (Others, with many variations, available.)

289. K+E 4081 Manual --- K+E Slide Rule Manual, The Log Log Duplex Decitrig, No. 4081. By Kells, Kern, and Bland. 5 inches X 8 inches. Orange softcover. 102 pages. Copyright 1939. Very good condition. Includes pictures of the 4081, the Power Computing Slide Rule, the Kurtz Psychrometric Slide Rule, and the Ever-There 4097C and 4097D Slide Rules. (Several others, including different editions, available.)

290. K+E N4083-3 --- 10 inch Log Log Duplex Vector, with case, manual, and box. Scales: LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, and, on the other side, L, LL01, LL1, A [B, T, ST, S] D, Th, Sh2, Sh1. White laminate on mahogany. Patent #'s: 1,930,852; 2,168,056; 2,170,144; 2,285,722; 2,422,649.. Serial # 587078. Very good condition; very slight yellowing. Black, flip-top case like new. Manual is new. Original green slide box is solid, but shows some wear. A nice set. (Others available.)

291. K+E N4083 Supplementary Manual: --- K+E Supplementary Manual, Log Log Duplex Vector Slide Rule, No. N4083 . 5 inch X 7 1/2 inch rose-colored softcover. 37 pages. This booklet explains only the application of the plane and hyperbolic trigonometric scales to vector calculations. It is a supplement to the instructions covering the Log Log Duplex Decitrig Slide Rule No. N4081. Very good condition. (Others, similar, available.)

292. K+E 4088-1 --- 5 inch rule in case. Scales: K, A [B, S, T, CI] D, L, and, on the other side, DF [CF, CIF, C] D. Serial # 54105. Frameless cursor. Cracked glasses. Otherwise, good condition. White laminate on mahogany. Tan leather case is somewhat worn.

293. K+E 4088-2 --- 8 inch rule in case. Scales: K, A [B, S, T, CI] D, L, and, on the other side, DF [CF, CIF, C] D. Pat. June 5, '00 and Dec. 22 '08. Serial # 316552. White laminate on mahogany. Frameless cursor. Very good condition. Tan leather flip-top case, marked K+E Polyphase Duplex Slide Rule. Everything in very good condition.

294. K+E 4088-3 --- Unusual serial number, 10 inch rule. Scales: K, A [B, S, T, CI] D, L, and, on the other side, DF [CF, CIF, C] D. White laminate on mahogany. Frameless cursor. Patents June 5, '00 and Dec. 22, '08. Serial # 209487X . Very good condition.

295. K+E 4088-3 --- 10 inch rule, in case. Scales: DF [CF, CIF, C] D, and, on the other side, K, A [B, S, T, CI] D, L. White laminate on mahogany. Serial # 359460. Rule patent dates: June 5 '00 and Dec. 22 '08. Very good condition. Frameless cursor, one glass cracked (will be replaced.) Tan leather flip-top case, 4088-3S, K+E Polyphase Duplex Slide Rule, very good condition -- owner's name on back. (Others, with variations, available.)

296. K+E 4088-5 --- 20 inch rule in case and original box. Scales: K, A [B, S, T, CI] D, L, and, on the other side, DF [CF, CIF, C] D. Rule patents: June 5 '00 and Dec. 22 '08. Metal, thin-frame cursor. Serial # 54910. White laminate on mahogany. Very good condition -- some slight discoloration. Black leather-covered case/box, K+E Polyphase Duplex Slide Rule 4088-5, is in very good condition, with some weakness at the hinge points. Outer slide box, light green, has some splits, stains, and wear, but is all there. A nice older set. (Another available.)

297. K+E 4091-3 --- Excellent, 10 inch rule in tan, leather, flip-top case (4091-3S, Log Log Decitrig). Scales: LL0, A [B, K, CI] T, S2, S1, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. Rule patent #'s: 1,488,686 and 1,930,852. Serial # 563610. White laminate on mahogany. Rule in excellent condition. Case mottled, but very solid. (Others available.)

298. K+E 4092 --- 10 inch rule, in case. Scales: LL1, LL2, LL3 [C, T, CI] D, L, and, on the other side, A [B, S, C] D. Rule patent: June 5 '00, Dec. 22 '08. Cursor patent: 8.17.15. (?) White laminate on mahogany. Mahogany on the edges. Framed cursor. Rule in very good condition, slight yellowing. Very good tan leather flip-top case. (Another available.)

299. K+E 4092-3 --- Virtually new, 10 inch rule in black, leather-covered flip-top box/case. Scales: LL0, A [B, S, T, C] LL3, LL2, LL1, and, on the other side, K, DF [CF, CIF, CI, C] D, L. Rule patents: 1,488,686 and 1,930,852. Serial # 509058. White laminate on mahogany. Virtually new. Case/box, K&E Log Log Duplex Slide Rule 4092-3, has some fading and a very little surface splitting, but is very solid. Beautiful rule. (Others available.)

300. K+E 4094 --- 10 inch Merchants rule in case. Scales: DF [CF, CI, C] D. 10 inch scale on the top beveled edge. 25 cm scale on the bottom beveled edge. Conversion factors on the back. White laminate on mahogany. Back is white plastic. Very good condition except for a little yellowing. Green, flip-top case also in very good condition.

301. K+E 4095-3 --- Almost new, 10 inch Merchant's rule. Soft cloth case. Scales: DF [CF, CI, C] D, and, on the other side, [CI] D. White laminate on mahogany. Pat. # 1,930,852. Serial # 833000. Just a few light scratches, otherwise, beautiful. Gray cloth case.

302. K+E 4097C --- 5 inch rule in case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 5 inch scale and 13 cm scale on the back. Good condition - one small corner chip. Brown leather case with pocket clip. (Others available.)

303. K+E 4097D --- 5 inch rule, no case. Scales: A, DF [CF, CI, C] D, K, and, on the back of the slide, [S, B, L, T]. 52 and 13 cm scales on the back. Rule patent # 1,875,927. Serial # 030325. White celluloid. Several broken corners and cracks, but the face of the rule is intact and not bad looking, and the cursor is OK. However, the rule is fragile -- to be looked at, not handled.

304. K+E 4098A --- 5 inch rule in tan, leather slip case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 5 inch and 13 cm scales on the back. Serial # 20050. Thin white plastic. Very good condition. Tan, leather K+E slip case in very good condition. (Others available.)

305. K+E N-4100 --- 10 inch Stadia rule, in case. Scales: R [H, HC, V] A, and, on the other side of the slide, [C, B]. 10 inch scale in tenths on top beveled edge. 25 cm scale on bottom edge. White laminate on mahogany. Patent 1,934,232. Serial # 280378. Instructions on the back. Very good condition. Black box/case in fair condition.

306. K+E N<4101> --- 20 inch rule in case. Scales: R [C, B] A, and, on the other side of the slide, [H, HC, V]. 20 inch scale on the top beveled edge. 50 cm scale on the bottom edge. White laminate on mahogany. Serial # 500509. Worn brown leather case. The rule is in very good condition.

307. K+E N-4133 --- 8 inch Roylance Electrical Slide Rule in case. A very uncommon rule "The Roylance Electrical Slide Rule is a modification of our regular Mannheim Slide Rule No. 4035 ... In addition to the usual Mannheim scales, it carries a series of scales or gauge marks by means of which the different properties of copper wire...may be determined without the use of tables." Scales: A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 8 inch scale on the top beveled edge. B.&S. Gauge Scales on the bottom edge. Equivalents on the back. White laminate on mahogany. Frameless cursor. Glass is cracked but useable. The rule is in excellent shape. The tan leather flip-top case is in good, but slightly marked up condition. It is labeled K+E Electrical Slide Rule.

308. K+E 4143 --- 10 inch, Kissam Stadia Rule, in case with separate plastic rule with instructions on it. Scales: R1 [V1, HC, V2] R2. 10 inch scale on the top beveled edge. 25 cm scale on the bottom beveled edge. Conversion factors on the back. White plastic. Serial # 396286. Separate flexible plastic rule marked, K+E Instructions for Kissam Stadia Rule No. 68 1486. Tan leather flip-top case with belt loop. Everything in excellent condition.

309. K+E 4160 --- 10 inch Chemist's rule. Scales: Sought Oxide Elem. [Given, C] D, and, on the other side, Sought Acid Base Salt [Given, CI] D. White laminate on mahogany? Patents June 5, '00 and Dec. 22, '08. Serial # 18311. Very good condition - some slight discoloration. Frameless cursor. (Another available.)

310. K+E 4161-1 --- 5 inch rule, green leather case, instructions, in original slide box. Scales: K, DF [CF, L, CI, C]D, A, and, on the back of the slide, [T, ST, S, C]. White plastic. Serial # 011085. Very good condition. Green leather slip case (K+E), in good condition, just a few indentation marks. Manual, 5 inches X 8 inches, green cover, 92 pages, copyright 1952 -- good condition, but folded to fit in box. Green slide box in good condition, just a few scuffs.

311. K+E 4161-3 --- 10 inch rule, green case. Scales: K, DF [CF, L, CI, C]D, A, and, on the back of the slide, [T, ST, S, C]. 10 inch scale on the top beveled edge and 25 cm scale on the bottom beveled edge. White plastic. Serial # 006572. Very good condition. Green slip case is broken.

313. K+E 4168 --- Essentially new, 5 inch Doric rule in case. Scales: K, A [B, ST, S] D, T, and, on the other side, DF [CF, CI, C] D, L. Serial # 342701. White plastic. Green leather slip case. Everything almost new.

314. K+E 4181-1 --- 5 inch rule in green leather pocket case. Scales: LL01, L, K, A [B, T, SRT, S] D, DI, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. White plastic. Serial # 058924. Copyright 1947. Rule in very good condition, as is the case. (Others available, including ST version.)

315. K+E 4181-3 --- Very nice,10 inch rule in green leather flip top case. Scales: LL01, L, K, A [B, T, SRT, S] D, DI, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. White plastic. Serial # 006027. Copyright 1947. Rule in very good condition, as is the green leather flip top case -- only a few small marks on the case. (Others available.)

316. K+E N9081-3, Doric --- 10 inch rule, Doric, complete with case, box, manual label. Scales: LL01, K, A [B, T, ST, S] D, L, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. White plastic. Serial # 13992. Very good condition, just a little dirt. Black leather K+E Doric flip-top case with just a slight amount of wear. Green slide box in very good condition, just some slight surface wear and marks. Plus a label that was used to explain that the N4081 Log Log Decitrig Manual could be used for the N9081 by just making a few slight changes. An appropriate 4081 manual is also available.

317. K+E 68 1100, Deci-Lon --- Nice, 10 inch Deci-Lon rule in tan leather, flip-top case. Scales: Ln-3, Ln-2, Ln-1, Ln-0, A [B, T, SRT, S, C] D, DI, K, and, on the other side, Sq1, Sq2, DF [CF, CIF, L, CI, C] D, Ln0, Ln1, Ln2, Ln3. White plastic. Serial # 142595. Very good condition. Tan, flip-top leather case, marked K+E Deci-Lon in gold, has just a few small marks. Complete with belt loop. (Others available.)

318. K+E 68 1210 --- Excellent 10 inch Log Log Duplex Decitrig rule, tan/orange leather case. Scales: LL01, L, K, A [B, T, SRT, S] D, DI, LL1, and, on the back, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2. Copyright 1947. Rule patents: 2,500,460; 2,168,056; 2,170,144; 2,285,722; and 2,422,649. Serial # 630559. No cursor patent number or other markings, except for a dot. White laminate on mahogany. Excellent condition. Tan/orange K+E leather case, marked K+E, very good condition.

319. K+E 68 1497 --- Like-new 10 inch rule, in like-new tan leather case, with like-new manual, with like-new brochure, and worn box. Scales: K, A [B, T, SRT, S] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. Serial # 540445. White laminate on mahogany. White strips on the edges. Pat. #'s: 2,500,460; 2,168,056; 2,170,144. Marked with a small US. Tan leather, flip-top case. Manual: K+E Slide Rule Manual, Polyphase Duplex Decitrig, Manual No. 68 2055, Old No. 4187U; green cover; 87 pages; copyright 1962. Small brochure: How to Take Care of Your Slide Rule by K+E. Green slide box is worn, everything else is like new.

320. K+E 68 1608 --- 20 inch rule in case. Scales: A [B, CI, C] D, L, and, on the back of the slide, [S, L, T]. 20 inch scale on the top beveled edge. 50 cm scale on the bottom edge. White laminate on mahogany. Equivalents on the back Serial # 960412. Very good condition, as is the green flip-top case.

321. K+E 68 1617 --- Excellent, 10 inch, 68 1617 rule in tan leather case. Scales: A [B, CI, C] D, K. 10 inch scale on the top beveled edge. 25 cm scale on the bottom beveled edge. White laminate on mahogany with a white plastic back piece. Conversion factors on the back, also owner's initials. Serial # 210222. Tan leather, flip-top case, marked K+E. Everything in excellent condition. (Another available.)

322. K+E 68 1622 Box --- Green outer slide box, marked K+E 68 1622 Polyphase Slide Rule, Old 4053-3. Solid, but with surface tears.

323. K+E 68 1892 --- Almost new, 10 inch K-12 Prep rule in case. Scales: K, A [B, S, CI, T, C] D, L. White plastic with dark green end pieces. Plastic slip case. (Others available.)

324. K+E Elementary Slide Rule Instructions --- 6 inch X 9 inch booklet, Elementary Instructions for Operating the Slide Rule - Mannheim Type. Published by K+E. Copyright 1928. 16-page booklet in good condition with two small punched holes, probably for inserting into a notebook. A very nice instruction book. (2)

326. K+E Log Log Duplex Manual --- Copyright 1926. 138+ page manual. 5 X 8 inches. Rose-colored cover. Pictures of the following rules: N4092-3, Roylance Electrical, Surveyor's Duplex, Merchant's, Chemist's, Mannheim, Polyphase, Polyphase Duplex, Log Log Duplex, and Stadia rules. Cover loose.

328. K+E Log Log Duplex Decitrig Manual --- Copyright 1939. 101-page manual. 5 inch X 8 inch. Rose-colored cover. Good condition, but covers loose. Manual No. 4081. By Kells, Kern, and Bland. Includes drawings of the 4081, Power Computing, Kurtz Psychometric, and Ever-There rules. (Others, several different editions, available.)

329. (K+E) Log Log Duplex Slide Rule Manual --- The Log Log Duplex Slide Rule, A Self Teaching Manual with Tables of Settings, Equivalents and Gauge Points. By William E. Breckenridge. For the K+E N4092-3 rule. Pictures of the N4092-3 as well as The Roylance Electrical, Surveyor's Duplex, Merchant's, Chemist's, Mannheim, Polyphase, Polyphase Duplex, Log Log Duplex, and Stadia. 138+pages. 5 inch X 8 inch. Rose-colored cover. Some tears and tape on the cover, and a few bent page corners inside. Contents are OK, however. Copyright 1926. (Others, including another edition, available.)

330. (K+E) Log Log Vector Slide Rule Manual --- The Log Log Vector Slide Rule. Designed by M.P. Weinbach and A.F. Puchstein. 21 pages. Rose-colored soft cover. Copyright 1930. Picture of the K+E 4093-3. Excellent condition except for some pencil marks and dirt on the covers -- looks cleanable.

331. (K+E) The Mannheim Slide Rule Complete Manual --- Copyright 1891. Covers rules 4031 and 4041. A sheet tipped into the front gives additional instructions for "newer rules, Nos. 4041F to 4051." 32 pages. Tan soft cover. Cover has rips and tears, but the contents are fine. Includes a listing and prices of K+E Calculating Devices -- all the early slide rules, Reckoning Machines, Thacher's, Fuller's, Sperry's, Charpentier's, Boucher, Goodchild Mathematical Charts, Webb's, etc.

332. (K+E) The Mannheim Slide Rule Manual --- The Mannheim Slide Rule, Nos. 4031S, N4035S, N4041, and 4051. A Self Teaching Manual with tables of settings, equivalents, and gauge points. 77 pages. 5 inches X 8 inches. Rose-colored cover. Copyright 1938. Includes pictures of the following slide rule models: Power Computing, Kurtz Psychrometric, Ever-There 4097C and 4097D, Roylance Electrical, Surveyor's Duplex, K+E Stadia, and Chemist's Duplex, as well as the N4041 and a K+E Engineer's Transit. The booklet is in very good condition.

333. K+E The Mannheim Slide Rule Manual --- The Mannheim Slide Rule, Nos. 4031S, N4035S, N4041, and 4051. A Self Teaching Manual with tables of settings, equivalents, and gauge points. 77 pages. 5 inches X 8 inches. Rose-colored cover. Copyright 1938. Includes pictures of the following slide rule models: Power Computing, Kurtz Psychrometric, Ever-There 4097C and 4097D, Roylance Electrical, Surveyor's Duplex, K+E Stadia, and Chemist's Duplex, as well as the N4041 and a K+E Engineer's Transit. The booklet is in very good condition, just a little dirt on the cover.

334. (K+E) The Mannheim Slide Rule Manual --- 34-36 pages, the first 12 of which are for The Mannheim Slide Rule, Nos. 4031S, N4035S, N4041, and 4051. A Self Teaching Manual with tables of settings, equivalents, and gauge points. Copyrighted 1891. The remainder of the pages are for The Polyphase Slide Rule. 5 X 8 inches, Rose-colored cover. (Others available.)

335. K+E, The Mannheim Slide Rule --- By William Cox. Copyright 1891. About 40 pages. Rose-colored soft cover. Good condition with some cover wear.

336. (K+E) The Mannheim and the Duplex Slide Rules, Complete Manual --- The Mannheim and the Duplex Slide Rules, Complete Manual. By Wm. Cox. Published by K+E, 1917. 58 pages, plus 11 page addition -- Supplement, The Slide Rule and Plane Trigonometry by J.M. Willard and a section on K+E slide rules, picturing: Mannheim, Duplex, Polyphase, Stadia, Roylance Electrical, Surveyor's Duplex, Merchant's, Chemist's Duplex, and an ad for the new, frameless cursor and magnifiers. Rose-colored soft-cover. Very good condition -- a little dirt and one nicked page.

337. (K+E) The Polyphase Slide Rule Manual --- The Polyphase Slide Rule, A Self-Teaching Manual. Breckenridge. Copyright 1925. 83+ pages. Rose-colored, soft cover. Pictures of the Roylance Electrical, Surveyor's Duplex, Merchant's, Chemist's Duplex, Mannheim, Polyphase, Polyphase Duplex, Log Log Duplex, and Stadia rules. (Others, including other editions, available.)

338. K+E, The Slide Rule --- Published by K+E in 1891, Written by William Cox. 30 pages. Flexible hardcover. Some wear, but a nice old volume.

340. K+E Slide Rules, A Self Instruction Manual --- A 5 inch X 8 inch, green, hard-cover book, 126 pages, for use with the following slide rules: Log Log Duplex Decitrig (4081) and Jet Log Duplex Decitrig (4181). Includes a drawing of a Log Log Duplex Decitrig rule. Good condition. Copyright, 1955. (Others available.)

341. K+E Slide Rule Manual, Log Log Duplex Decitrig (N4081) --- 5 X 8 inch, green softcover. By Kells, Kern, and Bland. 123 pages, plus a 7 page supplement for the DI scale. Copyright 1947. (Others, including different editions, available.)

342. K+E Supplementary Manual, Log Log Duplex Vector, No. N4083 --- 37-page, maroon and rose, softcover manual. Almost new. (Another available.)

343. Kingson Rule and Calculator --- 5 inch metal rule with Addiator-type calculator on the back, complete with stylus, instructions, and case. Scales: A [B, CI, C] D. 6-column calculator. Blue, see-through plastic case. Made in British Hong Kong. Essentially new. (Others available.)

344. Klawun --- 5 inch rule in case. Marked: Castell, Klawun, Kaufmann, System Klawun. Scales: KZ [T, Val., p%, E, T] V, Z, and, on the back of the slide [sh/d, British Pounds]. White plastic. Brown leather slip case. Very good condition.

345. Klawun 1 --- Excellent, 10 inch rule in case. Marked: No.1 Feinmessinstitut Klawun Berlin-Charlottenburg 5. Scales: A [B, C] D. 30 cm and 12 inc scales on the back. White laminate on mahogany. Cursor slots on both sides so that the cursor can be switched. Black, two- piece slide case, a little worn. The rule is in excellent condition.

346. Klawun-Rex 200 --- 10 inch rule. Scales: K, DF [CF, CIF, CI, C] D, A, and, on the back of the slide, [sin, cos, P, tan/cot. 27 cm scale on the top beveled edge. L on the bottom edge. White plastic. Marked: Klawun Hanover. Also, Castell. Good condition.

347. Klawun 333/S --- 10 inch rule in case. Scales: K, DF [CF, CI, C] D, A, and, on the other side of the slide, [S, lg, T]. 27 cm scale on the top beveled edge. 10 inch scale on the bottom edge. Marked: Feinmessinstitut, Joe Klawun, Berlin - Charlottenburg 5. White laminate on mahogany. Charts on the back. No cursor. Very good condition. Black, two-piece slide case.

348. Klawun Meteor 400 --- 10 inch rule in case. Scales: L, K, DF [CF, CI, C] D, A, P, S, T. White plastic with green scale highlights. Chips on top edge, otherwise good condition. Blue plastic slide case.

349. Kordt & Rosch --- 5 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 5 inch and 13 cm scales on the back. Marked: Kordt & Rosch A.-G., Wipperfurth (Rhld.). Heavy metal-framed cursor. White laminate on mahogany. An older rule with some repair to the back, but interesting. Two-piece, black slide case with rounded ends.

350. Lafayette F-686 --- Almost new, 10 inch Vectorlog rule in case. Scales: Sh1, Sh2, DF, A [B, CF, Th, CI, C] D, LL3, LL2, db, and, on the other side, Tr1, Tr2, P', P [Q, ST, Sr, Se, C] D, LL03, LL02, LL01. White laminate on bamboo. Brown, leather, flip-top case with belt loop. Everything almost new.

351. Lawrence Engineering 8-B --- 7 1/2 inch rule with box. Scales: A [B, CI, C] D, K. Light-colored wood, no paint. Instructions on the back. Marked Lawrence Engineering Service, Wabash, Indiana, Made in U.S.A. (Others available.)

352. Lawrence Engineering 10-B --- 9 1/2 inch rule. Scales: A [B, CI, C] D, K. White paint on light-colored wood. Equivalents and other measures on the back. Marked Lawrence Engineering Service, Peru, Indiana, Made in U.S.A. (Others, some with magnifier, available.)

353. Lawrence Engineering 250-BT --- 10 inch rule in blue slip case. Scales: A [B, CI,C] D, K, and, on the back of the slide, [S, L, T]. White paint on light-colored wood. Equivalents and other measures on the back. Marked Lawrence Engineering Service, Peru, Indiana. Both rule and case in good condition. Blue case with gold lettering, Lawrence Engineering Service.

354. Lawrence Slide Rule Instruction Book --- 28-page, 5 1/2 inch X 8 1/2 inch booklet. Copyright 1939 by Lawrence Engineering Service, Peru, Indiana. Generally very good condition - one length-wise slight fold. Also included is a 6-page pamphlet, A Mannheim Type Slide Rule, with slide rule pictures/diagrams and descriptions. (Others available.)

355. Lightning Calculator, Type A --- a large circular device, published by The American Radio Relay League. Copyright 1932. A complex device consisting of a 8 1/2 X 11 inch base, followed by an irregularly-shaped almost circular piece, then a 4 1/2 inch circle, then a long clear cursor. The scales: Wire gauges - Double Cotton Covered, Double Silk or Single Cotton Covered, Enameled or Single Cotton Covered; Number of Turns per Inch; Diameter of Coil in Inches / Inductance in Micro-Henrys, Length of Coil in Inches / Capacity in Micro-Micro-Farads, Frequency in Mega-Cycles, Frequency in Kilo-Cycles, Wavelength in Meters. Heavy cardboard. Excellent condition.

356. Load Adjuster Boxes --- Different aircraft.

357. Loftus Proof Rule --- 9 inch boxwood Proof rule, marked Loftus Maker 146 Oxford St. London. Brass end pieces. Slight bow, otherwise, good condition.

358. Logarex 8401 --- Like new, 10 inch rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S-T, T]. 25 cm scale on the top beveled edge. 1:25 scale on the bottom edge. White plastic. Made in Czechoslovakia. Like new.

359. Logarex 27103 --- 4 1/2 inch rule in leather, flip-top case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, T]. White plastic. Marked: Rietz, Logarex 27103. Equivalents on the back. Excellent condition. Green leather flip-top case with snap closure, marked Dipl. Ing., Osmark, in very good condition, just a little dirt.

360. Logarex 27201 --- 5 inch rule. Scales: LL2, A [B, CI, C] D, LL3, and, on the back of the slide, [S, L, T]. On the back, 13 cm and 1:25 scales and equivalents. White plastic. Very good condition.

361. Logarex 27203 --- 5 inch rule. Scales: P, K, A [B, L, CI, C] D, SIN, TG, and, on the back of the slide, [LL1, LL2, LL3]. 12 cm scale on the top beveled edge. Equivalents on the back. White plastic. Good condition.

362. Logarex 27205 --- 5 inch rule with case. Scales: L, P, K, A [B, CI, C] D, T, S, ST, and, on the other side, LL1, LL2, LL3, DF [CF, CIF, CI, C] D, -LL3, -LL2, -LL1. Marked Toison D'Or. White plastic. Green plastic slip case. Rule in very good condition, case worn.

363. Logarex 27251 --- Excellent, 5 1/2 inch rule in leather case. Scales: P, K, A [B, CI, C] S,T, and, on the back of the slide, [LL1, LL2, LL3]. 13 cm scale on the top beveled edge. 5 inch scale on the back. White plastic. Marked: Darmstadt, Logarex 27251. Equivalents on the back. Brown leather slip case, marked Logarex, also in excellent condition. (Others available.)

364. Logarex 27403-II --- Excellent 10 inch rule in case. Scales: L, P, A [B, CI, C] D, S, T, ST, and, on the back of the slide, [LL1, LL2, LL3]. 25 cm scale on the top beveled edge. 1:25 scale on the bottom edge. White plastic. Excellent condition -- owner's name in slide well, in Russian. Red cardboard, two-piece slide case. (Others available.)

365. Logarex 27602-II --- 10 inch Exponent rule in case. Scales: L, LL/1, K, A [B, CI, C] D. sin, tg, st, and, on the other side, LL1, LL2, LL3, DF [CF, CIF, CI, C] D, LL/3, LL/2, LL/1. White plastic. Green plastic slip case. Almost new.

366. Logarex 27730 --- New in box, 10 inch Gas slide rule, for use with gas mains. Marked: Plynarenske Pravitko, Ceske Plynarenske Podniky. Scales: Pz-Pk, P squared z - P squared k [L, D] Q, ?. 25 cm scale on the top beveled edge. White plastic. Instructions on the back in Czech. English translation included. Green plastic two-piece slide case. Everything new.

367. Logarex 4542-27501 --- 20 inch rule in case. Scales: L, K, A [B, CI, C] D, sin, tg, LL3. White plastic. Tan, leather snap case. Like new. (Another available.)

368. Loughborough Conversion Rule --- 7x3 inch, heavy, ridged, white plastic conversion rule. Fisons Scientific Apparatus Ltd., Loughborough, Leicestershire, England. Large number of conversions: length, heat, weight, pressure, etc.

369. Lutz 102 S --- Almost new, 10 inch rule in brown leather flip-top case. Scales: S, K, A [B, CI, C] D, L, T. White laminate on bamboo. Marked Lutz No. 102 S, U.S., Made in Japan. Almost new. Brown leather flip-top case, marked Lutz Slide Rule, needs just a bit of clean-up to be like new. (Another available.)

370. Lutz 252 --- Excellent, 10 inch rule with leather case. Scales: K, A [CF, CIF, CI,C] D, DI, and, on the other side, DF [B, T1, T2, ST, S] D, L. White laminate on bamboo. Marked, Lutz No. 252, Made in Japan. Also U.S. on one end of the slide. Brown leather, flip-top case. Both in excellent, almost new condition. (Another available.)

371. Lutz Manual --- Instructions for the Use of Your Lutz Slide Rule, Model No. 151, No.252. 35 pages. Very good condition, but discoloration on the cover and some other pages.

372. Lutz Case --- Brown pigskin, flip-top case, marked Lutz Slide Rule. Very good condition, just a few small scrapes.

373. Lyra-Orlow 31-004 --- 5 1/2 inch rule in leather case, with instructions. No cursor. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 14 cm scale on the top beveled edge. Very good condition, but no cursor. Instructions in German. Made in Nurnberg. Beautiful tan leather slip case marked, Lyra Orlow, with a lyre emblem. A few loose stitches in the case.

374. Marc 2 --- 5 inch rule. Scales: A [B, C] D. 13 cm scale on the top beveled edge. Marked: Marc, Paris, Mannheim No. 2. White, ivory-looking plastic. Slight warp. Very good condition.

375. Marc 4 --- 5 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 14 cm on the top beveled edge. Ivory-looking white plastic. Brown leather slip case. Very good condition.

376. Maritime Circular Rule --- 7 inch circular rule by Maritime Training Services Division of Houston Marine Consultants. Scales: Distance in Nautical Miles, Distance in Yards, Time in Hours, Time in Minutes, Speed. Two wheels mounted on square backing -- all heavy plastic. Very good condition.

377. Meissner --- 5 inch rule in case. Scales: K, A[B, CI, C] D, L, and, on the back of the slide, [S, T]. Germany. White plastic. Good condition. Tan pigskin slip case in good condition.

378. Meissner K-G --- 10 inch Mono-Rietz rule. Scales: L, K, A[B, CI, C] D, S, T, ST. White plastic with a green slide. Dirty.

379. Meissner K-G --- 10 inch Rietz-Arcus rule in case. Scales: L, A, DF [CF, CI, C] D, S, T, ST. White plastic with blue slide. Good condition. Blue plastic flip-top case.

380. Meissner K-G Fabrikat --- 10 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. White plastic, some yellowing. Otherwise, very good condition. Two-piece, gray slide box.

381. Meissner K-G Fabrikat --- 10 inch, System Darmstadt rule in case. Scales: K, A [B, CI, C] D, P, and, on the other side, cm, L [LL1, LL2, LL3] T, S. White plastic, some yellowing. Otherwise, good condition. Two-piece, brown slide box.

382. Meissner-Fabrikat --- 10 inch System Darmstadt rule. Scales: K, A [B, R, C] D, P, and on the back of the slide, [LL1, LL2, LL3]. 27 cm, lg scales on the top beveled edge. Sin, cos, tg, ctg scales on the bottom edge. White laminate on pearwood. Tables on the back, part torn. Black, two-piece slide case is worn, but the rule is very good.

383. Meissner-Fabrikat 75/2b --- New in box, 10 inch rule. Scales: K, A [B, CI, C] D, L, and on the back of the slide, [sin, cos, sin/tg, tg, ctg]. 25 cm scale on the top beveled edge. 10 inch scale on the bottom edge. White laminate on birch? Tables on the back. Green, two-piece slide case is worn, but the rule is new.

384. MSZ 4617-57, Logar --- 10 inch rule in case. Scales: K, A [B, CI, C] D, P, and, on the back of the slide, [LL1, LL2, LL3]. On the top beveled edge: 27 cm, lg. On the bottom edge: sin, tg. Cursor wraps around both top and bottom edges. Instructions and equivalents on the back. White laminate on maple(?). A little wear, but generally very good condition. Blue box, worn.

385. Mulitor --- 3 1/2 inch circular slide rule with case, instructions, and box. Scales: A [B]. Multi-colored metal. Made in West Germany. Leather case. Instruction sheet. Orange outer box. Everything in very good condition.

386. Nestler Artillery Rule --- 14 inch, normal width, artillery rule by Albert Nestler. Scales: Ablage in Winkelsekunden [Ablage in m, Wahre E in hm] Geratekonstante, and, on the top beveled edge, Geratekonst. On the bottom edge, 35 cm scale. Instructions on the back in German. White laminate on mahogany. In black, two-piece slide case. An interesting rule.

387. Nestler --- 5 inch rule. Narrow. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 12 cm scale on the top beveled edge. 14 cm scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Narrow. Marked Siemens-Schuckert. No cursor. Otherwise, in good condition.

388. Nestler Rietz-S --- 5 inch rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 13 cm scale on the top beveled edge. White plastic with a blue plastic slide. Good condition, just a little dirt.

389. Nestler --- Older, 8 inch rule with unusual cursor. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 20 cm scale on the top beveled edge. 22 cm scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Heavy, metal-framed cursor has an extra flange on the top.

390. Nestler --- New, 10 inch rule marked Stahlbeton n-freies Verfahren, System "Maarschalk," in case. Scales: T1, T2, DF [CF, CIF, CI, C] D, P, S, ST, and, on the other side, K, A [B, CI, C] D, L. White plastic with green slide. New, but some corrosion on the metal end pieces. Brown leather case shows some water marks.

391. Nestler --- 10 inch rule marked Stahlbeton n-freies Verfahren, System "Maarschalk," in case. Scales: T1, T2, DF [CF, CIF, CI, C] D, P, S, ST, and, on the other side, K, A [B, CI, C] D, L. White plastic with green slide. Good condition, just some marks on the metal end pieces. Brown leather case shows some wear.

392. Nestler --- 10 inch rule in case. Scales: A, [B, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge and a 25 cm scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Held together with 10 small screws. Cursor is glass with metal guides. Very good condition -- just two initials lightly scratched in two places. Two piece black slip case/box. Very nice older rule.

393. Nestler --- 10 inch rule in leather case. Scales: A, [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge and a 25 cm scale on the bottom edge. Equivalents on the back in German. White laminate on mahogany. Held together with 10 small screws. Two cracks and one corner chip on the rule front. Some marks on the back. Otherwise the rule is in OK condition. The cursor is glass with metal guides -- it has come apart, but is complete and repairable. The case is brown leather with a flip top and a belt loop. It has an expansion at the top to accommodate the cursor. It has a name and small hole in the back and some rubs, but is actually quite nice.

394. Nestler Schul-Rietz --- New 11 inch rule, Nestler, Schul-Rietz, in hard plastic slip case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. White plastic with light-blue slide. Wide plastic cursor. Blue and white hard plastic slip case marked Nestler. Everything new.

395. Nestler Schul-Rietz --- New in box, 11 inch rule, Nestler, Schul-Rietz, in hard plastic slip case, with instructions. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 30 cm scale on top beveled edge. White plastic with light-blue slide. Wide plastic cursor with several markings. Blue and white hard plastic slip case marked Nestler. Blue outer box. Everything new. (Others available.)

396. Nestler Elemath RS --- New in box, 10 inch Elemath RS rule, with case, instructions, and box. Scales: K, A [B, CI, C], D, L, and, on the other side, T1, T2, DF [CF, CIF, CI, C] D, S, ST. White plastic with blue slide. Blue and ivory-colored plastic slip case marked Nestler. Instructions in French. Blue outer box. Beautiful set. Everything is new. (Others available.)

397. Nestler Elemath Log Log --- New in box, 22 scales, 11 inch Elemath Log Log rule, with case, instructions, and box. Scales: L, K, A [B, BI, CI, C], D, LL1, LL2, LL3, and, on the other side, T1, T2, DF [CF, CIF, CI, C] D, P, S, ST. White plastic with blue slide. Rubber bumpers so that the rule can be used sitting on a desk. Blue and ivory-colored plastic slip case marked Nestler. Instructions in French. Blue outer box. Beautiful set. Everything is new. (Others available, new and used.)

398. Nestler Polymath-Duplex --- New in box, 5 inch rule, with case, box, and instructions. Scales: LLO1, LL02, LL03, A [B, L, K, C] D, LL3, LL2, LL1, and, on the other side, CT, T, ST, DF [CF, CIF, CI, C] D, P, S, CS. White plastic with green slide and end pieces. Brown leather slip case. Instructions in German. Red and black outer box. Everything new. (Others available.)

399. Nestler 2 --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, lg, T]. White laminate on mahogany. Two-piece, black slide box. Some scratches and marks on the face of the rule.

400. Nestler 4 --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. White laminate on ? wood. Heavy metal-framed cursor. Narrower than normal rule. Two-piece, black slide case. Good condition.

401. Nestler 8 --- 10 inch rule in case. Scales: K, A [B, C] D, L. White paint on light-colored wood. Paint chipping. Equivalents in German on the back. Plastic cursor. Black slide case, marked: No. 8 Albert Nestler A. G. Lahr I,B., System Rietz, Jahoda & Bergmann, Wien III.

402. Nestler 9 --- 10 inch Rietz rule in box. Scales: K, A [B, CI C] D, L, and, on the back of the slide, [S, S&T, T]. On the back, 29 cm and 11 inch scales. White laminate on mahogany. Thicker than usual. Two-piece, black slide box. Very good condition. (Another available.)

403. Nestler 10 --- 10 inch rule. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 28 cm scale on the top beveled edge. 29 cm scale on the bottom edge. Equivalents, in German, on the back. White laminate on pearwood. Good condition.

404. Nestler 11 --- 5 inch rule, in case. Scales: A [B, C] D. 13 cm scale on the top beveled edge. White plastic. On the back, R. Dolberg Aktiengesellschaft. Brown leather slip case. Good condition.

405. Nestler 11ZR --- 5 inch rule, in case. Scales: A [B, CI, C] D, L. 13 cm scale on the top beveled edge. White plastic. Very good condition - just a slight warp. Interesting cursor. On the back, Stahlwerk Mannheim A.-G., Mannheim - Rheinau. Brown leather slip case. Very good condition.

406. Nestler 14 --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 25 cm scale on the top beveled edge. 27 cm scale on the bottom edge. Cm scale continued in the slide well. Equivalents on the back. Rule is narrower than normal. White laminate on mahogany. Two-piece, black slide box. Rule in very good condition.

407. Nestler 14 --- 10 inch rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 27 cm scale on the top beveled edge. 29 cm scale on the bottom edge. Cm scale continued in the slide well. Equivalents on the back. White laminate on mahogany. Two-piece, black slide box. Very good condition. (Another available.)

408. Nestler 21 --- Excellent 10 inch rule in box. Scales: K, A [B, CI, C] D, sin, cos; on the top beveled edge, 27 cm scale and lg; on the bottom edge, sin tg; and, on the back of the slide, LL1, LL2, LL3. No 21, Darmstadt, Albert Nestler A.G. LAHR I/B, D.R. Patent. White laminate on mahogany. Metal-framed cursor has an indicator for the lg scale on the top edge and an extension for the bottom-edge scales. Instructions and equivalents, in German, on the back. Two-piece black slide box. Excellent condition. (Others available.)

409. Nestler 21a --- 20 inch rule in case. Scales: K, A [B, CI, C] D, SIN COS, and, on the back of the slide, [LL1, LL2, LL3]. On the top beveled edge, 55cm, lg. On the bottom edge, sin, tg. Instructions and equivalents on the back. White laminate on pearwood. 3 inch wide cursor with a mark for the lg scale on the top edge and a wrap-around for the bottom edge scales. Plating loss on the metal cursor frame. A small burn mark on the cm scale. Otherwise, very good condition. Marked: No 21a, Darmstadt, Albert Nestler A.-G. Lahr i/B., D.R.P. Two-piece, black slide case, worn.

410. Nestler 21/53 --- 10 inch rule in box. Scales: L, K, A [B, CI, C] D, P, sin/cos, tg/ctg, and, on the back of the slide, LL1, LL2, LL3. 10 inch scale on the top. beveled edge. Equivalents on the back. Older white plastic -- very substantial. Very good condition, with some slight yellowing. Metal-framed glass cursor with tiny corner chip. Two-piece blue cardboard slide box.

411. Nestler 22 --- A true 6 inch rule, in box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 16 cm scale on the top beveled edge and a 17 cm scale on the bottom edge. White laminate on mahogany. Cursor has a heavy metal frame, with a corner of the glass missing. Otherwise, the rule is in very good condition. The black, two-piece cardboard box is well-worn.

412. Nestler 21/23 Manual --- Manual with catalog listing. 52 page manual for Nestler Rietz 23 rule and Nestler Darmstadt 21 rule. Includes a foldout showing both rules. In the back is a list of 36 Nestler models. Cover partly faded, but, otherwise, very good condition. (Others available.)

413. Nestler 23 --- 10 inch rule. Scales: K, A [B, CI, C] D, L, (unmarked) and, on the back of the slide, [S, S&T, T]. Also, 27 cm scale on the top beveled edge and 1:25 scale on the bottom edge. Cm extension scale in the well. Marked No. 23, System Rietz, Albert Nestler A.G., LAHR i/B, D.R.G.M., D.R. Patent. Equivalents on the back. White laminate on mahogany. Very good condition. No case. (Others, with variations, available.)

414. Nestler 23R with Magnifier --- Excellent 10 inch rule with magnifier, in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 10 inch scale on the top beveled edge and 1:5 scale on the bottom edge. Cursor with raised magnifier section. Marked: System Rietz, No. 23R, Albert Nestler A.G., LAHR i/B, D.R.P. Equivalents on the back. White laminate on pearwood. Brown leather case with expanded section for magnifier. Case and rule marked: Westfalisches Versandhaus, Bielefeld. Everything in excellent condition. (Others available.)

415. Nestler 23R --- New in box, 10 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. Also, 27 cm scale on the top beveled edge and 1:25 scale on the bottom edge. Cm extension scale in the well. Marked: System Rietz, No. 23R, Albert Nestler A.G., LAHR i/B, D.R.G.M., D.R. Patent. Equivalents on the back. White laminate on mahogany. Black two-piece slide case. New. (Others, used, available.)

416. Nestler 27 Prazision --- 10 inch Prazision rule in case.

417. Nestler 28 Universal --- 10 inch rule in case. Scales: L, C [?, ?, C] D, A, and, on the bottom edge, K, BI, and, on the back of the slide, [S, S&T, T]. 25 cm scale on the top beveled edge, continuing to 53 cm in the slide well. Equivalents on the back. Heavy metal-framed cursor. White laminate on mahogany. Excellent condition. Two-piece, black slide box.

418. Nestler 33 Chemiker --- 10 inch chemical rule in box. Scales: Chem. [Chem., C] D, and on the back of the slide, [Chem., C]. 25 cm scale on the top beveled edge. 27 cm scale on the bottom edge. Heavy metal framed cursor. Chemical notations on the back. White laminate on pearwood. Black, two-piece slide box. Very good condition. (Others available.)

419. Nestler 036a --- 10 inch Electro rule in case. Scales: V, A [B, CI, C] D U?, and, on the back of the slide, [S, L, T]. K, ? on the bottom edge. Dynamo, Volt in the slide well. Charts on the back, in German. 27 cm scale on the top beveled edge. White laminate on mahogany. A chip out of one corner, otherwise good condition. Cursor wraps around to bottom edge. Two-piece, black slide case.

420. Nestler 37 --- 10 inch Electro rule in case. Scales: V, A [B, CI, C] D, U, and, on the back of the slide, S, S&T, T. LL2/LL3, K on the bottom edge. Cursor wraps to the bottom edge. 27 cm scale on the top beveled edge. White laminate on pearwood. Marked: Electro No.37, Albert Nestler A.-G. Lahri/B., D.R.P. Equivalents in German on the back. Very good condition. Two-piece, black slide box. (Others available.)

421. Nestler 40 --- 10 inch specialty rule in case. Scales: q, Z [T, R, M, D] K, L. (These are not the standard scale labels.) On the other side of the slide [British Pounds, s, d]. 27 cm scale on the top beveled edge. 11 inch scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Excellent condition. Two-piece black slide case.

422. Nestler 43 --- Specialized 10 inch rule. Scales: K, A [B, X, h, fe, C] D, L, and, on the back of the slide, [B, X, h, fe, C]. 27 cm scale on the top beveled edge. 1:50 scale on the bottom edge. Chart on the back. White laminate on mahogany. Excellent condition.

423. Nestler 0115 --- Excellent, 5 1/2 inch rule in leather case. Scales: A [B, C] D, and, on the back of the Slide, [S, L, T]. 13 cm scale on the top beveled edge. White plastic with blue slide. Marked: Nestler Nr. 0115. Brown leather slip case. Everything in excellent condition.

424. Nestler 0121 --- New in case, 5 inch rule. Scales: P, K, A [B, CI, C] D, S, T, and, on the other side of the slide, [LL1, LL2, LL3]. White plastic with green slide. Brown leather slip case. (Another, used, available.)

425. Nestler 0123 --- New in box, 5 inch Rietz rule with case and instructions. Scales: K, A [B, CI, C] D, L, and , on the back of the slide, [S, L, T]. 13 cm scale on the top beveled edge. White plastic with blue slide. Instructions in German. Brown leather slip case. Black, red, and white outer box. Everything new. (Another, used, available.)

426. Nestler 0130 --- New in box, 5 inch Multimath-Duplex rule with case, box, instructions, and separate equivalents rule. Scales: P, S, T1, T2, A [B, K, CI, C] D, R1, R2, L, ST, and, on the other side, LL00, LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, LL0. White plastic. Brown leather slip case. Instructions in French. Separate plastic equivalents rule. Everything new. (Others, without box and instructions, but everything new, available.)

427. Nestler 0142 --- New in case, steel/concrete, 5 inch rule. Scales: K, A [B, x, h, fe] D, L. 13 cm on the top beveled edge. White plastic with blue slide. Brown leather slide case. Everything new. (Others available.)

428. Nestler 0210 --- New in case, 10 inch Darmstadt rule. Scales: K, A [B, CI, C] D, P, and, on the back of the slide [LL1, LL2, LL3]. On the bottom edge, sin, cos, tan, cot. On the top beveled edge, 27 cm, lg. Wrap-around cursor. White laminate on mahogany. Brown leather flip-top case. Everything new. (Others available.)

429. Nestler 0215 --- 20 inch rule in case. Scales: K, A [B, CI, C] D, P, and, on the back of the slide, [LL1, LL2, LL3]. On the top beveled edge, 56 cm, lg. On the bottom edge, S, T. 3 inch wide cursor with a mark for the top-edge lg scale, and a wrap-around for the bottom edge scales. White laminate on mahogany. Equivalents on the back in both English and German. Excellent condition. Partial box.

430. Nestler 0232 --- Essentially new, 10 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [sin. sin/tan, tan]. 27 cm scale on the top beveled edge. 10 inch scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Brown leather, flip-top case. A very nice rule. (Others available.)

431. Nestler 0238 --- 10 inch Rietz rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. Equivalents on the back. 27 cm scale on the top beveled edge. White plastic. Blue plastic clamshell case. Everything very good condition.

432. Nestler 0252 --- New in box, 10 inch Beta rule with case, instructions and box. Scales: K, A [B, CI, C] D, L, and, on the other side, M(cm), DF [CF, CIF, CI, C] D, Z(inch). White plastic with green slide and end pieces. Clear, two-piece hard plastic case. Instructions in German. Red and black outer box. Everything new.

433. Nestler 0254 --- Essentially new in box, 10 inch Delta rule with case and instructions. Scales: L, K, A [B, CI, C] D, LL3, LL2, LL1, and, on the other side, T1, T2, DF [CF, CIF, CI, C] D, S, ST. White plastic with green slide and end pieces. Clear and blue plastic, two-piece case. Instructions in German. Red and black outer box is worn. Everything else is essentially new.

434. Nestler 0281 --- New in case, 10 inch Geometer rule. Scales: L, D [sin/cos, cos squared, C] D, A, and, on the back of the slide, [sin, sin/tan, tan]. 27 cm scale on the top beveled edge. K, BI on the bottom edge. German instructions on the back. White laminate on mahogany. Brown leather case. Everything new. (Others available.)

435. Nestler Multimath-Duplex 0292 --- New in box, 10 inch rule with case, separate equivalents rule, instructions, and box. Scales: LL00, LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, LL0, and, on the other side, P, S, T1, T2, A [B, K, CI, C] D, R1, R2, L, ST. White plastic with green slide. Rubber bumpers. Separate white plastic equivalents rule. Blue and ivory, two-piece plastic slide case or leather case. Instruction manual in German. Outer box, red and black or blue. Everything is new. (Others available.)

436. Nestler 0330 --- 10 inch Chemiker rule in case. Scales: chemical [chemical, CI, C] D, L, and, on the back of the slide, [chemical, CI, C]. 27 cm scale on the top beveled edge. Equivalents on the back. White plastic with green slide. Brown leather flip-top case. Everything almost new.

437. Nestler 0370 --- New in box, 10 inch rule, Nestler Electro, with box, box/case, and instructions. Scales: V, A [B, CI, C] D, U, and on the back of the slide, [S, ST, T]. Also, on the bottom edge, LL3, K. 10 inch or 27 cm scale on the top beveled edge. Equivalents on the back. White laminate on mahogany. Metal framed cursor wraps to the bottom scales. Brown or black leather case, or blue, two-piece, cardboard slide box/case. 31 page manual. Black, red, and white outer box. Everything factory-new. (Others, new and used, available.)

438. Nestler/Wichmann 4478 --- 20 inch rule in case. Marked Nestler as well as Gebr. Wichmann 4478. Scales: K, A [B, CI, C] D, P, and, on the back of the slide, LL1, LL2, LL3. On the top beveled edge, 55 cm and lg. On the bottom edge, sin, tg, cos, ctg. Equivalents on the back, in German. White laminate on pearwood. Two-piece slide case, black, marked Wichmann Nr. 4478. Everything in excellent condition.

439. Noble --- 10 inch "Noble" Slide Rule Improved and Arranged by Clifford Pasley. Sheffield, England. Scales: M, A [B, C] E, D. 27 cm scale on the top beveled edge. 10 inch scale on the bottom beveled edge. Heavy metal framed cursor. Various measures on the back. White laminate on mahogany. Good condition. Black, two-piece slide case.

440. Otis King Model K --- Almost new, in box. The rule is almost new. Serial # B3890. Scales: 423 and 414. The original box shows some wear. (Another available.)

441. Otis King Model L --- Scales: 430 and 429. Good condition with just a small tear on the 430 scale. Copy of the instructions.

442. Otis King's Instructions --- Older, original instruction booklet, with tears and wear.

443. PIC --- 5 inch rule in case. Scales: A [B, C] D. 5 inch scale on the top beveled edge. White plastic. Made in England. Brymill Tested Steels stamped on the back. Black leather slip case. Rule is somewhat worn, but nice. Case show little wear.

444. PIC --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge. 26 cm scale on the bottom edge. British Made. No cursor. Slide longer than the rule body. Equivalents on the back. White laminate on mahogany. Brown two piece case. Very good condition. (Others, including variations, available.)

445. PIC --- 10 inch rule in case. Scales: LL2, A [B, C] D, LL3, and, on the back of the slide, [S, L, T]. 27 cm scale on the top beveled edge. 10 inch scale on the bottom edge. White laminate on mahogany. Metal framed cursor. Fair condition. Green cardboard, two-piece slide box.

446. PIC 111 --- 10 inch rule in case. Scales: L, A [B, CI, ISD, ITD, TD, SD, C] D, K. Scale missing on the top beveled edge. White laminate on mahogany. Equivalents on the back, partial. Heavy metal cursor. Two-piece slide case. Poor condition.

447. PIC 221 --- 10 inch rule with case. Scales: LL01, LL02, LL03, DF [CF, CI, ISd, Itd, Td, Sd, C] D, LL3, LL2, LL1, and, on the other side, S, ST, T, A [B, L, K, C] D, DI, Ps, Pt. White plastic with tan plastic end pieces. Tan snake-skin-looking-covered cardboard box. Everything in good condition.

448. PIC 271 --- 10 inch rule with case and instructions. Scales: LL2, LL3, L, A [B, CI, ISd, ITd, Td, Sd, C] D, S, ST, T. White plastic with tan plastic end pieces. 23 page instruction manual (missing front cover.) Tan snake-skin-looking-covered cardboard box. Everything in good condition. (Another, similar, available.)

449. PIC 3664 --- 10 inch rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 27 cm scale on the top beveled edge. Ten inch scale on the bottom beveled edge. White laminate on mahogany. Heavy metal-framed cursor. Marked PIC, No 3664, A.O. Thornton, Ltd. Made in England. Good condition. Black, two-piece slide case/box.

450. Pickett, Fisher Control Valve Sizing Rule --- Excellent,10 inch specialty rule, made by Pickett for the Fisher Governor Company, Marshalltown, Iowa, U.S.A., in case. Copyright 1954. Scales: Steam Valve Sizes (Single Ported and Double Ported), Pressure Drop PSI, [Specific Gravity, Viscosity, Flow-Liquid-GPM], C sub V Liquid Coef., Liquid Valve Sizes (Single Ported and Double Ported), and, on the other side, P sub I Inlet Pressure, P sub C Corrected Inlet Pressure [Pressure Drop, Specific Gravity, Gas Temperature, Superheat, Flow Gas and Steam] C sub G, Gas Valve Sizes (Single Ported and Double Ported). Yellow on aluminum. Like new. Tan leather Pickett snap case -- marked Fisher Governor Company, Carter-Jones Company, Los Angeles -- in very good condition. (Another available.)

Pickett Four Foot Rules, new in original cartons with manuals: 451. N3-ES 452. 1010-ES

Pickett Seven Foot Rules: 453. 1010-ES Very good condition.

454. Pickett B1 --- New 10 inch Pickett B1, the only Pickett bamboo rule. No case. Scales: LL0-, L, K, A [B, S, ST, T, C] D, square root of 1, square root of 2, LL0+, and, on the other side, LL1-, LL2-, LL3-, DF [CF, CIF, CI, C] D, LL3+, LL2+, LL1+. White laminate on bamboo. Made in Japan. New. (Others available.)

455. Pickett Model 2 --- 10 inch rule Deci Log Log rule in case. Scales: 1/N1, 1/N2, 1/N3, 1/N4 [T, T, ST, S, CI, C] D, N1, N2, N3, N4, and on the other side, three cube root L [instructions, CF, CI, C] D, two square root. White on magnesium. Copyright 1945. Very good condition. Brown vinyl slide case. (Others, some with scale variations, available.)

457. Pickett Model X-3 --- New-in-box,10 inch, Executive Model X-3, Power Log Exponential, Log Log Dual Base rule, with executive presentation/storage box, manual, and blue felt slip case -- even the original cardboard outer cover. Scales: Two square root, K, A [B, ST, S, T, T, CI, C] D, DI, three cube root, and , on the other side, LLO, LL1, DF [CF, CIF, Ln, L, CI, C] D, LL2, LL3. Special, two-tone brown and white on aluminum. Special metal-framed cursor. Special metal end pieces. Black matte covered manual, How to Use Log Log Slide Rules. Blue felt slip case. Padded, black presentation box/case. Outer cardboard slip cover. All of the interior pieces are still covered in the original see-thru plastic wrap. Everything new. A very special, limited-edition rule and set.

458. Pickett Model 3 --- 10 inch Deci-Log Log rule, in case. Scales: three cube root, DF [CF, T, ST, S, CI, C] D, DI, two square root, and, on the other side, 1/N1, 1/N2, 1/N3, 1/N4, DF [CF, instructions, CI, C] D, N1, N2, N3, N4. White on magnesium. Very good condition - no paint bubbling and only very slight edge chipping. Brown rubber case. (Others, with scale variations, available.)

460. Pickett 3M-ES --- New in box, N 3-T, 10 inch rule with dual magnifies, a magnifier case, belt loop, manuals, guarantee, etc. Scales: 2 square root, K, A [B, ST, S, T, T, CI, C] D, DI, three cube root, and, on the other side, LLO, LL1, DF [CF, CIF, Ln, L, CI, C] D, LL2, LL3. Yellow aluminum. Double magnifying cursors. Mahogany leather flip-top case, expanded at the top for the magnifiers. Three manuals. Guarantee/receipt. Display box. Everything new.

461. Pickett Model N 3-ES --- New in case, 10 inch, Model N 3-ES, Power Log Exponential, Log Log Dual Base, leather case. Scales: Two square root, K, A [B, ST, S, T, T, CI, C] D, DI, three cube root, and , on the other side, LLO, LL1, DF [CF, CIF, Ln, L, CI, C] D, LL2, LL3. Yellow, aluminum. Copyright 1960. Brown leather flip-top case with belt loop has a few small marks, but is new, as is the rule. (Others, new and used, available.)

462. Pickett Model 3 Manual --- New, How to Use Model 3 Powerlog Slide Rules, by Maurice Hartung. Supplement to Manual M-14. 7 pages. Black cover.

464. Pickett N3/N3p-ES Twin Pack --- New in box, N3/N3p-ES Twin Pack, with maroon leather cases, 3 manuals, and display box. N 3 scales: Two square root, K, A [B, ST, S, T, T, CI, C] D, DI, three cube root, and, on the other side, LLO, LL1, DF [CF, CIF, Ln, L, CI, C] D, LL2, LL3. N3p scales: same. Yellow, aluminum. Maroon leather cases, large with flip top, small with pocket clip. Manuals: How to Use Log Log Slide Rules, 64 pages; How to Use Ln-L Scale Slide Rules, 16 pages; How to Use Model 3 Powerlog Slide Rules, 8 pages -- all matte black covers. A wonderful set. Everything new. (Others available.)

465. Pickett N3/N600-T Twin Pack --- New in box, N3/N600-T Twin Pack, with maroon leather cases, 3 manuals, papers, and display box. N 3 scales: Two square root, K, A [B, ST, S, T, T, CI, C] D, DI, three cube root, and, on the other side, LLO, LL1, DF [CF, CIF, Ln, L, CI, C] D, LL2, LL3. N600 scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. White, aluminum. Maroon leather cases, large with flip top and belt loop, small with pocket clip and pull-up tab. Manuals: How to Use Log Log Slide Rules, 64 pages; How to Use Ln-L Scale Slide Rules, 16 pages; How to Use Model 3 Powerlog Slide Rules, 8 pages -- all matte black covers. Guarantee/registration and nameplate offer. A wonderful set. Everything new.

466. Pickett N3p-T --- New in box, Synchrolog, Power Log Exponential, 5 inch rule, with case, manual, and box. Scales: two square root, K, A [B, ST, S, T, T, CI, C] D, DI, three cube root, and, on the other side, LL0, LL1, DF [CF, CIF, Ln, L, CI, C] D, LL2, LL3. White on aluminum. Black leather case with pocket clip. Manual: How to Use Log Log Slide Rules. Display box. Everything new. (Others available.)

467. Pickett Model 4 --- New in box, 10 inch, Deci-Log Log Vector Hyperbolic rule, with manual. Scales: three cube root, DF [CF, T, ST, S, CI, C] D, DI, two square root, and on the other side, 1/N1, 1/N2, 1/N3, 1/N4, DF/m [CF/m, Th, Sh, Sh, CI, C] D, N1, N2, N3, N4. White on magnesium. This is really a new magnesium rule, but the slide needs to be freed up. The box is gray and labeled for the rule. The 26 page manual is perfect. Everything is new. (Others, used, with scale variations, available.)

468. Pickett N4-ES --- New in box, 10 inch Vectorlog rule with case, belt loop, manuals, guarantee, and display box. Scales: 2 cube root, DF [CF, CIF, T, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/M [CF/M, TH, SH, Ln, L, CI, C] D, LL3, LL4. Mahogany leather flip-top case with belt loop. Two manuals. Guarantee. Blue, black, and white display box. Everything new. (Others, new and used, available.)

469. Pickett N4-T with Magnifier --- Very nice 10 inch Model N4-T, Dual-Base Log Log, Reciprocal Scale (Vector Hyperbolic) with case, in box, with magnifier. Scales: 2 cube root, DF [CF, CIF, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/M [CF/M, TH, SH, Ln, L, CI, C] D, LL3, LL4. White on aluminum. Tan, California Saddle Leather case. Clip-on magnifier. Original outer box is taped, but everything else is in excellent condition.

470. Pickett N4-T --- 10 inch Model N4-T, Vector-Type Log Log, Dual-Base Speed Rule, in case. Scales: 2 cube root, DF [CF, CIF, T, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/M [CF/M, TH, SH, Ln, L, CI, C] D, LL3, LL4. White on aluminum. Copyright 1959. Excellent condition. Tan, leather, flip-top case very solid with just a few marks. (Another available.)

471. Pickett N4/N600-ES Twin Pack --- New in box, N4/N600-ES, with leather cases, 3 manuals, guarantee/registration, display box. N4 scales: 2 cube root, DF [CF, CIF, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/M [CF/M, TH, SH, Ln, L, CI, C] D, LL3, LL4.. N600 scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. Yellow, aluminum. Maroon leather cases, the smaller with a pull-up tab and pocket clip, the larger with a belt loop and hanger. Manuals: How to Use Log Log Slide Rules, 64 pages; How to Use Dual Base Log Log Slide Rules, 93 pages; How to Use Ln-L Scale Slide Rules, 16 pages -- all with matte black covers. Display box. Guarantee/registration sheet. Everything brand new.

472. Pickett N4/N600-T Twin Pack --- New in box, N4/N600-T Twin Pack, with leather cases, 3 manuals, guarantee/registration, display box. N4 scales: 2 cube root, DF [CF, CIF, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/M [CF/M, TH, SH, Ln, L, CI, C] D, LL3, LL4.. N600 scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. White, aluminum. Maroon leather cases, the smaller with a pull-up tab and pocket clip, the larger with a belt loop and hanger. Manuals: How to Use Log Log Slide Rules, 64 pages; How to Use Dual Base Log Log Slide Rules, 93 pages; How to Use Ln-L Scale Slide Rules, 16 pages -- all with matte black covers. Display box. Guarantee/registration sheet. Everything brand new.

473. Pickett 4p-ES --- New in box, 5 inch Vectorlog rule with case, manual, and box. Scales: 2 cube root, DF [CF, CIF, T, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/m [CF/m, TH, SH, Ln, L, CI, C] D, LL3, LL4. Yellow aluminum. Black slip case with pocket clip. Manual. Display box. All new. (Others available.)

474. Pickett 4p-T --- New in box, 5 inch Vectorlog rule with case, manual, and box. Scales: 2 cube root, DF [CF, CIF, T, T, ST, S, CI, C] D, DI, square root, and, on the other side, LL1, LL2, DF/m [CF/m, TH, SH, Ln, L, CI, C] D, LL3, LL4. White aluminum. Black slip case with pocket clip. Manual. Display box. All new.

475. Pickett 6-T --- New in box, 6-T, Quality Control and Statistical Rule, with box, case, papers, and instructions. Scales: LL0, LL00, Po, A [B, F, F, S, T, C] D, Bo, f, L, and, on the other side, A2, D3, D4, DF [CF, d2, A0, D0, CI, C] D, LL3, LL2, LL1. White on aluminum. Mahogany leather flip-top case. Instruction manual. Guarantee and registration. Display box. Everything new. (Another available.)

476. Pickett 9-T --- New in box, 9-T, Eastern Texas Transmission Corporation, 10 inch rule in case with guarantee and box. Scales: B24, B [C, S, d1, d2, d3] P, Pm, and, on the other side, A [B, C] D, L. Copyright 1955. White on aluminum. Mahogany leather flip-top case. Guarantee and registration. Display box. Everything new.

477. Pickett PR-12 --- New in box, 10 inch, Trig, projection rule. Scales: K, A [B, T, S, CI, C] D, L. Clear plastic. Maroon leather, fold-over snap case. 8 1/2 x 11 manual, A Teaching Guide for Slide Rule Instruction, 43+ pages. Includes several pages of Pickett slide rules and selection instructions. Everything new.

478. Pickett PR13 -- Almost new, 10 inch, clear plastic projection rule, in case and box. Trig scales: K, A [B, T, S, CI, C] D, L. Clear plastic for projection. Unusual, horizontal, two-snap, maroon leather case. Guarantee. Original outer box. The outer box is a bit worn, but the rule and case are almost new.

479. Pickett Model 14 --- Like new, 10 inch rule, U.S. Military Slide Rule, in leather case, with manual. Scales: LL1, LL2, A [B, T, ST, S, K, C] D, LL3, LL4, and, on the other side, Opposite Angle - Deg., Mils [Apex Angle, Tan, Sin-Tan, Base] Distance, A. Yellow on aluminum. Tan leather flip-top, snap case, marked Pickett and US, has a belt loop. Includes a separate plastic rule with triangle data and equations that fits in a special slot in the case. 93-page manual, How to Use Dual Base Log Log Slide Rules. The manual has some slight cover wear. Everything else is like new.

480. Pickett N16-ES/N 600-ES Twin Pack --- New in display box, yellow, aluminum rules, mahogany leather cases, three manuals, plot sheet, guarantee. Manuals: How to Use Dual Base Log Log Slide Rules, How to Use Ln-L Scale Slide Rules, How to Use the N-16ES Electronic Slide Rule; a Nyquist Plot Sheet, and a guarantee. The display box is black, gold, and white. The scales on the N-16-ES are: SH1, SH2, TH, DF [CF, L, S, ST, T, CI, C] D, LL3, LL2, LL1, Ln, and, on the other side, theta, db, D or Q, XL, Zs or Xc [C or L, F, lambda, two I can't reproduce here, Cr] Lr, db, cos theta. The scales on the 600-ES are: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. Mahogany leather flip-top case for the N16. Mahogany leather pocket-clip case with a pull-up tab for the N600. A beautiful set. (Others available.)

481. Pickett Model 20 --- 5 inch Basic rule in case with manual. Made of folded, silver aluminum. Scales: K, A [B, T, S, CI, C] D, L. Brown slip case with pocket hook. 30 page manual. Very good condition. (Another available.)

483. Pickett 22 --- 5 inch Real Estate Costimator rule, Model 22, in case. Scales: Building Area in Square Feet [Cost per Square Foot in Dollars, Percentage of Depreciation] Depreciated Building Cost in Dollars. White painted steel(?) with a little surface rubbing on the edges. Partial instructions. Slide case.

484. Pickett ED-26 --- Almost new 7 inch clear projection rule in case. Scales: K, A [B, CI, C] D, L. Marked Pickett Model ED-26. Also marked Charles Beseler Company Cat.# 7279. Clear plastic. Tan leather flip-top case. Everything almost new.

485. Pickett Model 61 --- 5 inch rule in slip case. Scales: K, A [B, CI, C] D, L. White plastic with black plastic tend pieces. Very good condition. On the back, Elevator Division, Selectomatic Mark IV, Westinghouse. Brown leather slip case, like new.

486. Pickett 101-C --- 4 1/4 inch circular, Dial-Rule in case. Yellow on aluminum. Scales: C, CI, A, Af, L, Fa, LL2, LL1, DS, DT, M, and, on the other side, C, S, ST, T, decimal/fraction equivalents. Two cursors on front, one on back. Black leather case. Everything in excellent condition.

487. Pickett 105-C --- New in package, 4 inch circular Profit Calculator rule. Scales: Percentage of Margin of Profit on Selling Price, Percent of Profit Mark-Up from Cost Price, Unit Cost, List Price, Percent of Discount from List Price. Heavy white plastic with a clear circular overlay and clear cursor. In original packaging.

488. Pickett 120 --- 10 inch rule in black slip case. Scales: K, A [B, T, S, CI, C] D, L. White plastic with black plastic end pieces. Both rule and case in very good condition. (Others available.)

489. Pickett 120C-ES Microline --- New in package, Microline 120 with black slip-case and instructions. On original orange hanging card. Scales: K, A [B, S, T, CI, C] D, L.

490. Pickett 120 Microline --- New Pickett 120 Microline. Scales: K, A [B, S, T, CI, C] D, L. White plastic. (Others, new and used, available.)

491. Pickett 121 --- 10 inch rule, with case. Scales: K, A [B, T, S, CI, C] D, L. Equivalent tables on the back. White plastic with white end pieces. Good condition, just a little dirt. Gray slip case. (Another available.)

492. Pickett 125 Microline --- 10 inch Microline 125 in case. Scales: K, A[ B, CI, C] D, L, and, on the back, fraction-to-decimal conversion [S, ST, T, C] D. White plastic. Very good condition. Black slip case. (Another available.)

493. Pickett 140 --- Like new, Pickett Log Log No. 140, in case. Scales: LL0, LL00, A [B, ST, T, S, C] D, K, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. Plastic. Like new. Gray slip case. (Another available.)

494. Pickett 140C-ES Microline --- New in package, 10 inch Microline 140 with black leatherette slip case, with instructions. On original orange hanging display card. Scales: LL01, K, A [B, S, ST, T, C] D, DI, LL1, and, on the other side, LL2, LL3, DF [CF, CIF, L, CI, C] D, LL2, LL3. Yellow plastic. Everything new. (Others available.)

495. Pickett 140C-T Microline --- New, 10 inch Microline 140. Scales: LL01, K, A [B, S, ST, T, C] D, DI, LL1, and, on the other side, LL2, LL3, DF [CF, CIF, L, CI, C] D, LL2, LL3. White plastic. New.

496. Pickett 140 Microline --- New 10 inch Microline 140 in black leatherette slip case, with instructions. Scales: LL01, K, A [B, S, ST, T, C] D, DI, LL1, and, on the other side, LL2, LL3, DF [CF, CIF, L, CI, C] D, LL2, LL3. White plastic. Rule, case and instructions, new. (Others, new and used, available.)

497. Pickett 160 Microline --- 5 inch rule in black slip case. Scales: K, A [B, CI, C] D, L. White plastic. A little dirt, otherwise, very good condition. The black slip case has the owner's name in silver. (Another available.)

498. Pickett 160-ES Microline --- New in box, 5 inch rule, with instructions and case. Scales: K, A [B, CI, C] D, L. Yellow plastic with black slip case. Instruction sheet. Orange, black, and white outer box. Everything is new. (Another available.)

499. Pickett 160-T Microline --- New in box, 5 inch rule, with instructions and case. Scales: K, A [B, CI, C] D, L. White plastic with black slip case. Instruction sheet. Orange, black, and white outer box. Everything is new. (Others available.)

500. Pickett 200 --- 5 inch rule with leather slip case. Scales: K, A [B, CI, C] D, L, and, on the back, [S, ST, T]. White on aluminum. Very good condition. Tan leather slip case with pocket clip, Pickett embossed on both sides, good condition, but some stitches missing and a little wear. (Another available.)

501. Pickett N200-ES --- New in box, 5 inch Trig Slide Rule with leather case, manual, and box. Scales: K, A [B, CI, C] D, L, and, on the back, [S, ST, T, C] D. Yellow, metal. Still in original plastic wrap. Mahogany, leather case with pull-up tab and pocket clip. 63-page manual, How to Use Trig Slide Rules. Original black, blue, and white box. Everything new. Everything original. (Others, new and used, available.)

502. Pickett N200-T --- New in box, 5 inch Trig Slide Rule with leather case, manual, and box. Scales: K, A [B, CI, C] D, L, and, on the back, [S, ST, T, C] D. White, metal. Still in original plastic wrap. Mahogany, leather case with pull-up tab and pocket clip. 63-page manual, How to Use Trig Slide Rules. Original black, blue, and white box. Everything new. Everything original. (Others available.)

504. Pickett 400 Manual --- How to Use Pickett 400 Business Slide Rules. 22-page, soft, matte black cover manual. Very good condition. (Another available.)

505. Pickett 500 --- 10 inch rule in leather case. Scales: LL0, LL00, A [B, T, ST, S] D, K, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. White on magnesium. Some surface bubbling, typical of this 1948-series model. Cursor serial # 6890H60. Brown leather flip-top case with snap belt loop, in very nice shape. (Others available.)

506. Pickett N500 / 300ES Set --- New, Pickett Dual Base, Log Log, N-500-ES, N-300-ES, paired set, in tan suede cases. Both rules are yellow on aluminum. Both still in original plastic. Both cases, tan suede. The 500 case is a flip-top, the 300 case is a slip-case. Both with Pickett in gold lettering. Everything is new. (Others, with black leather cases, available.)

507. Pickett N-500-ES --- New in box, 10 inch rule, Hi Log Log, in black leather, flip-top case, with box, guarantee, and instruction manual. Scales: +LL1, -LL1, A [B, T, ST, S, C] D, DI, K, and, on the other side, +LL2, -LL2, DF [CF, CIF, L, CI, C] D, +LL3, -LL3. Yellow metal. 95-page manual, How to Use Log Log Slide Rules. Guarantee/registration card. Green, black, and white box. Everything new. Everything original. (Others, new and used, available.)

508. Pickett N-500-T --- New in box, 10 inch rule, Hi Log Log, in black leather or soft tan leather, flip-top case, with box, guarantee, and instruction manual. Scales: +LL1, -LL1, A [B, T, ST, S, C] D, DI, K, and, on the other side, +LL2, -LL2, DF [CF, CIF, L, CI, C] D, +LL3, -LL3. White on aluminum. 95-page manual, How to Use Log Log Slide Rules. Guarantee/registration card. Green, black, and white box. Everything new. Everything original. (Others available.)

509. Pickett N515-T Electronic --- Like new, 10 inch rule, marked Cleveland Institute of Electronics, with maroon, leather flip-top case. Scales: H, 2pi, A [B, S, T, CI, C] D, L, Ln. Rule is white on aluminum. Like new. Electronic formulas and data on the back. The case, marked Pickett, Cleveland Institute of Electronics, is in very good shape. (Others available.)

510. Pickett 520 --- 10 inch, U.S. Air Force Aerial Photo Slide Rule, Type A-1, in leather case with equivalents window. Scales: L, A, DF [CF, CIF, T, S, C] D, DI, K, and, on the other side, Ground Size [Image Size, Focal Length] Altitude. White on magnesium. Some paint crazing, otherwise in good condition. Brown leather flip-top case with a long, clear window with equivalents in it -- very good condition.

511. Pickett 520-T --- 10 inch, U.S. Air Force Aerial Photo Slide Rule, Type A-1, in leather case with equivalents window. Scales: L, A, DF [CF, CIF, T, S, C] D, DI, K, and, on the other side, Ground Size [Image Size, Focal Length] Altitude. White on aluminum. Brown leather flip-top case with a long, clear window with equivalents in it. Very good condition. (Another available.)

512. Pickett 525-T --- New in box, StatRule, 10 inch, with case, manual, papers, and box. Scales: (p+q), X squared df, A [B, BI, L, CI, C] D, two square root, and, on the other side, Sp, p [q, z, Pl, y, N] d, X squared, Sig. Level. White on aluminum. Black leather case with belt loop. Manual: Complete Instruction Manual for the Model N-525 Stat Rule. Guarantee, registration and list of Pickett models. Slide box. Everything new. (Others available.)

513. Pickett 531-ES --- New in box, 10 inch, Capitol Radio Engineering Institute rule with guarantee and registration sheet, case, and outer box. Scales: L, Ln, A [B, CI, C] D, 2 Pi, K, and, on the other side, LL2, LL1 [S, ST, T, C] D, LL3. Yellow, aluminum. Gray slide case. Guarantee and receipt sheet. Brown, orange, and white outer box. Everything new. (Others, used, available.)

514. Pickett 535-ES --- New in box, Electronic Technician, Designed by Chan Street, 10 inch rule, with case, manuals, papers, and box. Scales: L, Ln, Cr/ A1 [Lr/ B, St, T, S, C/(L/or I)] D/ (F, Xl, E, R, W), DI/ Xc, K, and, on the other side, Cr [Lr, (C, L, or, I)] (F, Xl, E, R, W), Xc. Yellow on aluminum. Black leather flip-top case. Three manuals: How to Use Electronic Technicians Slide Rules, How to Use Trig Slide Rules, and How to Use Ln-L Scale Slide Rules. Registration and guarantee. Display box. Everything new.

515. Pickett N540-T --- New in box, Pratt & Whitney Aircraft CS 126-1,10 inch rule, with case and guarantee. Scales: Inlet Air Temperature [Inlet Air Pressure, C] D, and, on the other side, Correction [Inlet Air Temperature, Indicated Degrees C, F] Corrected Degrees F, C. White on aluminum. Marked Pratt & Whitney. Black leather, Pickett, flip-top case. Green, black, and white outer box. Guarantee. Everything new. (Others, new and used, available.)

516. Pickett N 550-T --- Unusual, nice, 10 inch, Model N-550-T, Warren-Knight Weight Rule - No. 11371-ET, with case. Scales: L, A, DF [CF, CIF, T, S, C] D, DI, K, and, on the back, Thickness [Width, Length, Material, Shape] Weight. The Material scale is labeled: Lead, Copper, Brass, Steel, Cast Iron, Aluminum, Magnesium. Copyright 1962 by Warren-Knight Co., Philadelphia, PA. White on aluminum. Very good condition. Brown leather case has some cracking on the flip top.

517. Pickett N 600-ES --- New, in display box, 5 inch, with case and manual. Scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. Yellow aluminum. Maroon leather pull-up-tab case. Manual, How to Use Log Log Slide Rules -- copyright 1953, 95 pages. Everything factory-new. (Others, new and used, available.)

518. Pickett N 600-T --- New 5 inch rule in case. Scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. White, aluminum. Maroon leather pull-up-tab case. Everything factory-new. (Others available.)

519. Pickett N600 MF (unpainted aluminum) --- New in box, 5 inch rule, with manuals, case, papers, and original box. Unpainted (silver). Scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. Black leather case with a pocket clip and pull-up tab. Manuals: How to Use Log Log Slide Rules and How to Use Dual Base Slide Rule Exponential Ln-L Scales. Several small papers. Outer slide box. Everything new.

520. Pickett N606-ES --- New in box, 5 inch rule, Simplex Trig with Metric Conversion, with case, instructions, guarantee, supplemental instruction sheet, and box. Scales: K, A [B, T, S, CI, C] D, L, and, on the other side, Degrees F/ Frac., A [Conversion Scales] B, Degrees C/ Dec. Still in original plastic. Black slip case. 64-page manual, How to Use Trig Slide Rules, matte black cover. Separate sheet: How to Use Conversion Scales. Guarantee. Blue, black and white outer box. Everything new. (Others available.)

521. Pickett N800-ES --- Essentially new, 10 inch Log Log rule in leather case. Scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, CIF, L, CI, C] D, LL3. Yellow on aluminum. Very good condition Marked Speed Rule and Synchro-Scale. Black leather flip-top case marked Pickett, in good condition. the rule itself is essentially new. (Another available.)

522. Pickett 800-T --- New in box, Log, Log, Exponential, 10 inch rule with black leather case, 64-page instruction manual, papers, and green, black, and white display box. Scales: LL1 (two scales), A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2 (two scales), DF [CF, CIF, L, CI, C] D, LL3 (two scales). White, aluminum. Even includes a belt loop. Everything new. (Others, new and used, available.)

523. Pickett N803/N600-ES Twin Pack --- New in box, N803/N600ES Dual-Rule Matched Set, with black leather cases, manual, and guarantee/registration. N803 scales: 2 square root, K, A [B, S, ST, T, CI, C] D, DI, DFm, and, on the other side, LL0, LL1, DF [CF, CIF, L, CI, C] D, LL2, LL3. N600 scales: LL1, A [B, ST, T, S, C] D, DI, K, and, on the other side, LL2, DF [CF, Ln, L, CI, C] D, LL3. Both yellow, aluminum. Beautiful matte black leather cases. Manual, How to Use Log Log Slide Rules, 95 pages, copyright 1953. Everything new.

524. Pickett 901 --- 10 inch, Simplex rule. White on magnesium. Scales: A [B, 1/C, C] D, K. Instructions and definitions on the back. Good condition except for frozen slide.

525. Pickett N901-T --- 10 inch Simplex rule in case. Scales: K, A [B, CI, C] D, L. Equivalents on the back. White on aluminum. Good condition with light scratches. Brown slip case. (Another available.)

526. Pickett N901-T --- Essentially new, 10 inch Simplex Math rule in case. Scales: A [B, CI, C] D, L. On the back, X [Y, C*] D*. Copyright 1965. White on aluminum. Gray slip case. Everything essentially new. (Another available.)

527. Pickett 902K-ES Slide Rule Kit --- New in box, a wonderful, complete slide rule kit. Consists of a N902-ES rule (yellow, aluminum); a black slide case; a 64-page book, Programmed Self-Instruction, How to Use a Slide Rule, by Eugene Roberts (copyright 1962, 1969); a registration and guarantee slip; all beautifully packed in a large, 13 inch X 9 inch, clear-fronted, green, black, and white box. A really nice, new set for use or display. (Others available.)

528. Pickett 902 --- 10 inch rule. Scales: K, A [B, S, T, C] D, L. On the back, definitions and instructions. White on magnesium. Cursor is unusual in that the guides ride in slots on the rule, and there is no back side to the cursor. The rule has some slight dirt and fading and a few tiny paint bubbles, but is generally fine.

529. Pickett N902-ES --- New in box, 10 inch rule, Simplex Trig, in black leatherette slip case. Scales: K, A [B, T, S, CI, C] D, L. Yellow on aluminum. With 64-page, 1960 manual, plus guarantee card. Original external box is worn; everything else is new. (Others, used, available.)

530. Pickett N902-T--- New, 10 inch rule, Simplex Trig, in black leatherette slip case. Scales: K, A [B, T, S, CI, C] D, L. White on aluminum. Instructions on the back. New. Case has a few marks on it. (Others, new and used, available.)

531. Pickett 902-RT --- New in box, 10 inch, Pickett Simplex Trig with Ring Binder Case, instruction manual, and guarantee/registration. Scales: K, A [B, T, S, CI, C] D, L. Instructions on the back. White on aluminum. Still sealed in original plastic. The case is very interesting -- red-brown, with holes for a ring-binder and pockets for two pens/pencils. Manual, How to Use Trig Slide Rules, by Maurice Hartung, 64 pages, Copyright 1960. Guarantee/registration sheet. Beautiful black, yellow, brown, and white slide box. This is a very nice set, new, as it came from the factory. (Others available.)

532. Pickett 903-ES --- New in box, 10 inch Trig Conversion rule with case, manual, guarantee, and display box. Scales: K, A, DF [CF, T, S, CI, C] D, L. Conversions and instructions on the back. Yellow, aluminum. Black slip case. 64 page manual, How to Use Trig Slide Rules, Copyright, 1960. Guarantee and registration card. Green, black, and white display box. Everything is new. (Others available.)

533. Pickett 903-T --- 10 inch Trig and Conversion rule. Scales: K, A, DF [CF, T, S, CI, C] D, L. Conversions, equivalents, and instructions on the back. White, aluminum. Good condition - two initials on the back. Plastic case.

534. Pickett 905-ES "A" --- Excellent, 10 inch Texas Speed Rule in case. Scales: K, A [B, K, CI, C] C, L, and, on the back, [T, ST, S, C] D. Marked Texas Speed Rule. Yellow on aluminum. Excellent condition. Case in good condition. (Others available.)

535. Pickett N906-T --- New in box, 10 inch, National Fire Sprinkler Corp., Hydraulic Slide Chart slide rule. Copyright 1968. Scales: DP, LO, FL [QF, M, QV] VP, V, KF, and, on the other side, A [B, CI, C] D, L. White aluminum. Designed by J.O. Edmonds. In original plastic sleeve. Black slip case. Outer box. Everything new. (Another available.)

536. Pickett N909-ES -- New in box, 10 inch rule, Metric Conversion Simplex Trig, with case and instructions. Scales: K, A [B, T, S, CI, C] D, L, and, on the other side, various English and metric conversions - Degrees F/ Degrees C, Tons Short/Metric, , Miles/Kilometers, Sq. and Cu. Meters and Feet, Meters/Yards, Meters/Feet, Kilograms/Pounds, Liters/Quarts, Ounces/Grams, Cu. Inches/ Cu Cms., Inches/Centimeters, Sq. Meters/Sq. Yards. Sq. Inches/ Sq. Cms., Sq. Miles/ Sq. kilometers, Cu. Meters/Cu. Yards. Yellow on aluminum. Black slip case. Instruction manual. Blue, black, and white box. Box is a little squished. Everything is new. (Another, in case, available.)

537. Pickett 1000 --- Excellent, 10 inch rule, Ortho-Phase Duplex, in cloth case with instructions and original box. Scales: A [B, T, ST, S] D, K, and, on the other side, DF [CF, CIF, CI, C] D, L. White on magnesium. Copyright 1948. Excellent condition, as is the gray felt case. Instructions, How to Use the Ortho-Phase Duplex Slide Rule Model 1000, in very good condition, just the box fold and a few pencil marks. Original gray slide box shows a little wear, but is solid. A very nice set. (Others available.)

538. Pickett 1000-T --- Very nice, 10 inch rule, in leather case. Scales: K, A [B,ST, T, S, C] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. White on aluminum, with slots for the cursor. Copyright 1948. Very good condition, as is the tan leather snap case.

540. Pickett N 1006 --- New, 5 inch rule in leather case. Scales: K, A [B, ST, T, S, C] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. White on aluminum, with slotted rails. Tan leather case with pocket clip. Case is solid, but worn. Rule in good condition.

541. Pickett N 1010-ES / ICS: Like-new, 10 inch Trig rule in black leather, flip-top case. Scales: K, A [ B, ST, T, S, C] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, DI, L. Yellow metal. Like-new. Copyright 1959. Like-new, black leather case -- ICS, Since 1890, printed on it in gold, along with Pickett. Obviously a set made especially for the International Correspondence Schools. Everything like new.

542. Pickett N1010-ES --- Very nice, 10 inch Trig rule in tan leather, flip-top case, with case, box, and papers. Scales: K, A [ B, ST, T, S, C] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, DI, L. Yellow, aluminum. Excellent condition. Copyright 1959. Tan leather case, very good condition. Also included are small papers. Box shows shelf wear. (Others available.)

543. Pickett N1010 SL-ES --- New, 10 inch Super Power Trig rule. No case. In original plastic sleeve. Scales: 2 square root, A [B, ST, T, S, C] D, DI, K, and, on the other side, L, DF [CF, CIF, CI, C] D, DI, Ln. Yellow, aluminum. Brand new. (Others available.)

544. Pickett N1010-T --- Excellent, older model, aluminum 10 inch Trig rule in case. Scales: K, A [ B, ST, T, S, C] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. White on aluminum. Grooves for cursor guides. Marked Pickett & Eckel 271. Brown slip case. Everything excellent.

545. Pickett N1010-T --- New in box, 10 inch Trig rule no case, with instructions and papers. Scales: K, A [ B, ST, T, S, C] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, DI, L. White on aluminum. Copyright 1959. Still in original plastic. 64-page instruction book, How to Use Trig Slide Rules by Maurice Hartung. Copyright 1960. Guarantee/registration sheet. Green, black, and white slip box. Everything new. (Others, used, available.)

546. Pickett 1011-ES --- Like-new, 10 inch Trig-Exponential Speed Rule in black, leather flip-top case, with box and manual. Scales: K, A [B, ST, T, S, C] D, DI, and, on the other side, Ln, DF [CF, CIF, CI, C] D, DI, L. Yellow, aluminum. Copyright 1959. Manual, How to Use Ln-L Scale Slide Rules, 16 pages, matte black cover. Rule, case and manual, like-new. Outer box shows wear. (Others available.)

547. Pickett 1020-ES --- New in box, 10 inch rule, National Radio Institute, with case, manual, guarantee and registration slip, and display box. Scales: K, A [B, ST, T, S, C] D, DI, and, on the other side, 2 pi, DF [CF, L, CI, C] D, DI. Black leather flip-top case. Manual and papers. Display box shows some wear. Everything else is brand new. (Another, almost new, available.)

548. Pickett 1084 --- New in box, Resistance Design Slide Rule, with case manual and outer box. Scales: K, A, DF [CF, T, S, CI, C] D, L, and, on the other side, 12 resistance-related scales. White on aluminum. Copyright 1954, S.E. Hardaway. Black, leather, flip-top case. Manual is a normal 64 page, "How to Use Trig Slide Rules" volume. The outer display box is green, black, and white and shows a little shelf wear. Everything is new, however. The rule is in its plastic sleeve.

549. Pickett How to Use Basic Slide Rules --- How to Use Basic Slide Rules, Simplified Instructions. 16-page manual. White paper cover with black printing. Excellent condition, just folded from being in a case. (Others, similar, available.)

550. Pickett How to Use Dual Base Slide Rule Exponential Ln-L Scales --- 16-page, black and yellow, soft-covered manual. Illustrations of Model 1011 and Model 4. Like new. (Others, similar, available.)

551. Pickett How to Use Dual Base Log Log Slide Rules --- 93-page, black and yellow, soft-covered manual. Illustrations of N4-ES, N2-ES, N3-ES, and 600-ES. New.

552. (Pickett) How to Use Log Log Slide Rules --- New, How to Use Log Log Slide Rules. By Maurice Hartung. 64 pages. Black matte cover. Copyright 1953 by Pickett. Pictures of Model 600 Log Log, Model 300 Log Log, and Model N4-ES Vector Log Log Dual Base rules. New condition. (Others, similar, available.)

553. (Pickett) How to Use Model 3 Powerlog Slide Rules --- Matte black cover. 8 pages. Supplement to Manual M-14.

555. Pickett Log Log Manual --- How to Use Log Log Slide Rules. 64-page manual, matte black cover. Pictures of Models N3ES, N803ES, and N800ES. Also Model 600 Log Log, Model 300 Log Log, and Model N4ES. Brand new.

556. Post 1441 --- 4 inch rule, 4 3/4 inch overall length. Only 7/8 inch wide. With magnifying cursor. Scales: A [B, CI, C] D, and, on the back of the slide, [S, L, T]. 4 inch scale on top beveled edge. White laminate on bamboo. Marked: Frederick Post Co., 1441, Hemmi, Japan. Magnifying cursor marked: Sun Hemmi, Japan. The rule is in excellent condition.

557. Post 1444K --- 5 inch rule in brown leather slip case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White laminate on bamboo. Marked on the back: Sun Hemmi, Japan, D J. Also marked on the back: Stephens-Adamson Mfg. Co. Cursor marked: Sun Hemmi Japan. Rule in very good condition, just a little dirt. Brown leather case, marked Post 1444K in gold, is worn and stained, but solid. (Another available.)

558. Post 1444 P--- 5 inch rule in tan, leather slip case. Scales: A [B, CI, C] D, K and, on the back of the slide, [S, L, T]. Also, a 5 inch scale on the bottom beveled edge and a 12 cm scale on the top beveled edge. White plastic. Excellent shape. Case is tan leather with Post 1444P embossed, a few light marks. (Another available.)

559. Post 1445 --- 8 inch rule. Scales: K, DF [CF, CI, C] D, A, and, on the back of the slide, TI, L, SI. White laminate on bamboo. Labeled Frederick Post Company, Chicago, Hemmi, Japan. Excellent condition. (Others available.)

560. Post 1446 --- 10 inch rule. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. White laminate on bamboo. (Others available.)

561. Post 1447 --- Almost new, 10 inch rule with case. Scales: A [B, CI, C] D, K, and, on the back of the slide [S, L, T]. white laminate on bamboo. Two-piece, gray, hard plastic case. (Others available.)

562. Post 1450 --- Essentially new, 10 inch Versatrig 1450 with case. Scales: K, DF [CF, CIF, CI, C] D, R1, R2, and, on the other side, L, A [T, ST, S, C] D, DI. White laminate on bamboo. Rule and cursor marked Hemmi Japan. Essentially new, as is the black leather flip-top case with snap belt loop. (Another available.)

563. Post 1452 --- Old style, 10 inch rule, made in Germany, in unusual case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White laminate on mahogany. Heavy metal-framed cursor marked, Germany. 10 inch scale on the top beveled edge. 26 cm scale on the bottom edge. Marked, in the slide well, Frederick Post Co., Made in Germany. Table of constants on the back. Very good condition. Probably made by Nestler or Faber. Two-piece slip case is black-covered with rounded ends -- solid, but with some cover peeling.

564. Post 1452P --- Excellent, 10 inch rule. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on the top beveled edge and a 25 cm scale on the bottom edge. Equivalents on the back. White plastic. Excellent condition. (Another available.)

565. Post 1452T --- 10 inch rule, no case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on the top, beveled edge and a 27 cm scale on the bottom edge. Marked, Sun Hemmi Japan. White laminate on bamboo. Good condition except for 1 cm missing from the laminate on the cm scale, and a little dirt. Cursor is a K+E, patent # 2,086,502, thin metal frame.

566. Post 1452W --- 10 inch Universal rule, brown leather, flip-top case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on the top, beveled edge and a 27 cm scale on the bottom edge. Marked: Universal, Frederick Post Co. 1452W, Sun Hemmi Japan. White laminate on bamboo. Various tables on the back. In excellent condition. It is labeled, Post 1452W.

567. Post 1457 --- 10 inch Mannheim-Trig rule, no case. Scales: T, DF [CF, CIF, CI, C] D, S, ST, and, on the back of the slide, [B, K, L, C]. Also on the back, various equivalents and trig functions. White laminate on mahogany. Some yellowing and fading. Two of the four plastic end pieces are broken. The cursor is loose, scratched, and cracked on one side. (A filler for a hole in your collection.)

568. Post 1459 --- 10 inch specialty rule, in case. Scales: K, A [B, CI, C] D, T, and, on the other side, theta, R sub theta, P [Q, Q', C] LL3, LL2, LL1. White laminate on bamboo. Made by Sun Hemmi. Very good condition. Brown leather, flip-top case.

569. Post 1460 --- Very nice, 10 inch Versalog 1460 rule with mahogany, leather, flip-top case and belt loop. Scales: LL/1, LL/2, LL/3 [T, ST, S, C] D, LL3, LL2, LL1, and, on the back, LL0, LL/0, K, DF [CF, CIF, CI, C] D, R1, R2, L. White laminate on bamboo. Rule and cursor both marked Post, Hemmi Japan. Serial # 627826. Rule in very good condition, as is the case, with belt loop. (Others available.)

570. Post 1460 --- 10 inch Versalog 1460 II rule in plastic, mahogany, flip-top case. Scales: L, LL/1, LL/2, LL/3 [T, SRT, S, C] D, LL3, LL2, LL1, and, on the back, LL/0, K, A, DF [CF, CIF, CI, C] D, R1, R2, LL0. White laminate on bamboo. Rule and cursor both marked Hemmi Japan. Rule in excellent condition. Case, complete with belt loop is in excellent condition. (Another available.)

Post 1461 --- For a beautiful, new-in-box, very similar rule (both are made by Sun Hemmi), see Sun Hemmi 149A.

571. Post 1462H --- Unusual 10 inch, Postrig, Sun Hemmi, Made in Occupied Japan rule in leather case. The is not the later 1462 with painted markings. This is a good Sun Hemmi with engraved markings. Scales: T, DF [CF, CIF, CI, C] D, S, ST, and, on the other side, LL0, LL00, A [B, K, L, C] LL3, LL2, LL1. White laminate on bamboo. Marked: Postrig, The Frederick Post Co., 1462H, Sun Hemmi, Made in Occupied Japan. There is a half-dime size piece of laminate missing on the top, right front, mostly obscuring the 1462H designation. The cursor is marked Sun Hemmi, Made in Occupied Japan. The cursor glass is cracked on both sides and one of the eight screws is missing. There is some dirt, but otherwise, the rule is ok. The brown, flip-top, leather case, marked Post 1462H, Made in Occupied Japan, is worn and missing the flip-top hold-down strap, but is generally solid. An unusual set. (Another available.)

572. Post 1462 --- 10 inch rule in brown, vinyl(?), flip-top case, care instructions, and original box. Scales: LL0, LL00, A [B, K, L, C] LL3, LL2, LL1, and, on the back, T, DF [CF, CIF, CI, C] D, S, ST. White laminate on mahogany. Slight yellowing. Some of the red lettering is faint and difficult to read. One of the black plastic end pieces is broken. Case, marked Post, is worn. Sheet, Treatment and Adjustment of Post-Dual and Mannheim Trig Slide Rules, like new. Original red box is reasonably solid, with some stains and cracking. Original sales receipt for $9 is also included. (Others available.)

573. How to Use your Post Slide Rule --- How to Use your Post Slide Rule, Easy to Understand Instructions. 19-page brochure. Includes a fold out illustration and ad for a Versalog 1460. Very good condition, just very slight cover soiling. (Another available.)

574. It's Easy to Use Your Post Slide Rule --- 23-page booklet, 3 1/2 inches by 6 inches. It includes a two-page fold-out ad for the Versalog.

575. The Post Lifetime Guarantee --- a small, four-page folder with the Post slide rule guarantee, construction details, care guide, and list of rule models. New. (Others available.)

576. Post Versalog Slide Rule Manual --- Several copies of different hardback editions. About 119 pages.

577. Post Versalog II Manual --- 194 pages, softcover. (Another available.)

578. Rally Rule, Mobil --- a 4 inch circular rule on a 4 1/2 inch X 6 inch card. Marked: Treibstoff-Verbrauchs-Rechner. Two sided. Cardboard. All text in German. (Another available.)

579. Radiac Circular Calculator, No 1 --- New, 5 inch circular calculator/rule to measure radiation after an atomic explosion. Three progressively smaller wheels track Dose, Dose-Rate, and time. White plastic in green military-type case, marked Calculators, Radiac No. 1, Z8/ 6665-99-911-0117. (Others available.)

580. Rank Xerox --- New in box 10 inch rule. Marked: Rank Xerox, though likely made by someone else. Scales: S, K, A [B, CI, C] D, L, T. 31 cm and 15 (not inches) on the back. White plastic. Gray outer carton.

581. Reiss 312 --- 5 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [sin, tg]. 13 cm scale on the top beveled edge. Company name on back. White plastic. Plastic slip case.

582. Reiss --- 5 inch rule in case. Scales: K, A, DF [CF, CIF, C] D, P, S, T, and, on the back of the slide, [LL1, LL2, LL3, L]. 15 cm scale on the top beveled edge. White plastic. Gray slide case. Good condition - a few light rubs.

583. Reiss --- Solid brushed aluminum, 10 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the other side of the slide, [S, ST, T]. Slide is longer than the rule body. OK condition. No cursor. Gray, plastic, flip-top case.

584. Reiss Darmstadt --- Excellent solid brushed aluminum, 10 inch rule, in case. Scales: K, A [B, CI, C] D, L, and, on the other side, P, sin/tg [LL1, LL2, LL3] sin, tg. Excellent condition. Two-piece slide case. (Others available.)

585. Reiss Progress --- Like new, solid brushed aluminum, 10 inch rule in case. A very nice rule made of solid, unpainted aluminum. Scales: A, DF [CF, CI, C] D, L, and, on the other side, T1, T2 [LL1, LL2, LL3] D, S. Marked: Reiss, 3223, Progress. Plastic, flip-top case. Everything like-new.

586. Reiss Simplex --- 10 inch rule in case. Scales: K, A [B, CI, C] D, L. 28 cm scale on the top beveled edge. White laminate on birds-eye maple (?) Very good condition. A nicely-made rule. Two-piece slide box. 587. Relay 102 --- 10 inch rule, no box. Scales: A [B, CI, C] D, K, and, on the back of the slide, S, L, T. White laminate on bamboo. Marked: Relay No. 102, TL-213, Made in Japan, I.K-3. Very good condition.

588. Relay 505 --- 5 inch rule in box. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White laminate on bamboo. Excellent condition. Black and red slide box with just a few slight marks.

589. Richardson Rule Works 1776 --- Excellent, 10 inch rule, in box. Scales: K, SIN, A [B, CI, C] D, TAN, LOG. White on metal. Marked, Made in U.S.A., Richardson Rule Works, Pat. 1-31-11, 3-26-12. Two holes on the front, with letter scales underneath. Problems/instructions on the back. Complete with cursor. Excellent condition. Brown, two-piece slide box, in very good condition. (Others available.)

590. Ricoh 102 --- New in box, 10 inch rule. Scales: A [B, CI, C] D, K. White laminate on bamboo. Equivalents on the back. Two tone red slide box. Rule still sealed in original plastic. Everything new.

591. Ricoh 105 --- New in box, 10 inch rule, with case and instructions. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 25 cm scale on the top beveled edge. 10 inch scale on the bottom edge. Equivalents on the back. White laminate on bamboo. Blue and ivory, two-piece, plastic slip case. 27-page manual. Green and white outer box. Everything new. (Others, new and used, available.)

592. Ricoh 505 --- 5 inch rule in pigskin case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 13 cm scale on the top beveled edge. 5 inch scale on the bottom edge. Equivalents on the back. White laminate on bamboo. Very good condition, just a little dirt. Pigskin, flip-top case in very good condition with some darkening.

593. Ripley Boxwood Rule, 24 Inches --- 24 inch boxwood slide rule. Made by Ripley, London. Scales: 24 inch, 200 cm, Numb [Numb, Numb] S : Rumb, Mer, E:P, and, on the other side, Sin, Tan, Sine [Sine, Tang] Tang, Sine, V:Sine. Brass endplates. Very good condition.

594. Royal Ecola 1053 --- 10 inch rule in case. Scales: L, K, A [B, CI, C] D, S, ST, T, and, on the back of the slide, [S, LL2, LL3]. On the back of the rule, 25 cm and 1/20 inch and 1/32 inch scales. White plastic with some blue scales. Green and ivory, two-piece plastic slide case. Very good condition.

595. Rudolf Neumann --- Nice, older, 10 inch rule. Marked: Rudolf Neumann, Leipzig/1. Scales: A [B, C] D. White laminate on heavy mahogany. Good condition. Black, two-piece slide box.

596. Russian Circular, Pocket Watch Type --- New, 2 inch diameter, Russian pocket-watch style circular slide rule. Two-sided with two knobs. Box is worn. Rule appears to be new. (Others available.)

597. Russian Rule --- 5 inch rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, L,T]. 13 cm on the top beveled edge and on the bottom edge. White laminate on pearwood. Metal framed cursor. Very good condition. Looks like a Faber.

598. Russian Rule --- 5 inch rule. Scales: K, A [B, CI, C] D, ?, and, on the back of the slide, [S, ST,T]. White laminate on birch? 1953. Metal framed cursor. Very good condition. (Others, similar, available.)

599. Russian Rule --- 10 inch rule, in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. White laminate on mahogany. 1970. Metal framed cursor. Very good condition. Brown, two-piece slide box. (Others, similar, available.)

600. Russian Rule --- 10 inch duplex rule, in case. Scales: K, A [B, S, ST, T, C] D, DI, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. White laminate on mahogany. 1971 or 1975. Black plastic slip case. (Others, similar, available.)

601. Russian Rule, Very Unusual --- Duplex rule, in box. White laminate on mahogany. Wood cursor guides. 25 cm scale on the top beveled edge. Between the Russian language and odd scales, I can't quite figure the rule out, but at least some of the scales are for temperature. Ask for pictures. Two-piece blue box/case. Very interesting rule in very good condition. (Another available.)

602. Russian Rule --- Like-new, 10 inch rule in case. Scales: K, A [B, BI, CI, C] D, S, ST, T3, L, and, on the back of the slide, [LL1, LL2, LL3]. 27 cm scale on top beveled edge. White plastic. Marked 1979 or 1980. Hard green two-piece slide case. Everything like new. (Others, similar, available.)

603. Russian Rule --- 10 inch Russian rule in the old Faber-Castell style. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 25 cm scales on the top beveled edge and on the bottom edge. White laminate on pearwood. Heavy metal-framed cursor. Equivalents on the back. Made in 1956. Slide box is solid, but taped. Rule is in very good condition. (Others, similar, available.)

604. Sans & Streiffe 311 --- Almost new, 10 inch rule in case. Scales: LL0, LL00, A [B, K, CI, C] D, S, ST, T, and, on the other side, L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2. White laminate on bamboo. Marked, Made in Japan. Almost new, just a few very light surface scratches. The brown leather, flip-top case, marked Sans & Streiffe, is new. (Another available.)

605. Sans and Streiffe Instructions --- Sans & Streiffe Bamboo Slide Rules Duplex Instructions for General Calculation. 36-page, paper-covered booklet. Very good condition.

606. Santoku --- 10 inch rule in case. Scales: K, DF [CF, CIF, CI, C] D, A, and, on the back of the slide, [S, ST, T, L]. 25 cm scale on top beveled edge. White plastic with blue scale highlights. Two small chips. Otherwise in very good condition. Two-piece, blue and ivory, plastic case.

607. Senior --- A very interesting 13 inch rule (2 1/2 inches wide) with the following markings: Senior, Phone 25174. Multiple scales on both sides. The rule appears to have something to do with metal stock of some type. Some of the terms that appear on and around the scales include: Thickness, Circular, Octagon, Hexagon, Square and Cube, C'T Iron, R'ld Iron, Steel, Brass, Copper, Lead, Circumf, Cylinr, Square, Gallons, Nett Wei't, Plate Pile, Sheet Pile, Bulb Plate Beam, Foot Angle & T., Plate Side, Round Bar, Square Bar, No of 16 Feet Bars to 1 Ton, Bar Side. Very heavy white plastic with metal end plates. No cursor (there may not have been one). Single slide. Very good condition.

608. SIC 120-D Instructions --- New instruction booklet for an SIC circular rule. 5 inches X 7 inches, 18 pages. (Another available.)

609. SIC 300B --- New in box, 4 3/8 inch circular rule, labeled both Concise and Scientific Instruments Company. Scales: LL3, LL2, D [C, S, T1, T2, ST] and, on the other side, K, A, D [C, CI, B, L]. Cursor, as well as the rule, has the scale labels. Heavy white plastic. Inner wheels turn on both sides. Made in Japan. Still sealed in original plastic wrap. Black plastic slip case, marked Concise No. 300B. 36-page instruction booklet, Concise Circular Slide Rules and Conversion Tables. Warranty card. Original white box, marked SIC Circular Slide Rule No. 300-B. Everything is new. Everything is original. (Others available.)

610. SIC 4030 --- New in box, 4 Inch (4 1/2 inch total length), Model 4030, Junior Mannheim, Scientific Instruments Company Slide Rule. The rule is still sealed in its original packaging. Scales: A [B, CI, C] D and, on the other side of the slide, [S, L, T]. The rule is marked Scientific Instruments Company, 1961, Made in Japan. It is white laminate on bamboo. Also included are a 28-page manual, a warranty card, a brown leather slip case with a pocket clip, and a yellow, blue, and white original box to hold everything. Everything is original and new. (Others available.)

611. Simplon Log Log --- 10 inch rule in case. Scales: LU, A [B, CI, C] D, LL. White laminate on birch(?). Marked: "Simplon" Primary, (Log-Log) Slide Rule, Made in England. Very good condition. Flexible, green and clear plastic case.

612. Simplon Selecta --- 10 inch rule in case with instructions. Scales: A [B, C] D. White laminate on mahogany. Made in England. Good condition. Instructions are torn, but show the rule having been made by Dargue Brothers, Ltd., Simplon Works, Halifax, Eng. and cover four models. Two-piece, black slide box.

613. Skala --- 10 inch Polish rule in case with instructions. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [sin, sin/tg, tg]. 27 cm scale on the top beveled edge. 1:25 scale on the bottom edge. White laminate on pearwood. Equivalents on the back, in Polish. Two-piece, black slide case. Instructions in German. Everything in very good condition.

614. Skala --- 10 inch rule in case. Scales: L, P, K, A [B, CI, C] D, sin, lg, s-t. Serial # 309503. White plastic. Gray plastic flip-top case. Very good condition.

615. Staedtler Mars 944 03 --- New, 10 inch in original plastic package, with instruction manual. Scales: T1, T2, K, A [B, CI, C] D, S, ST, L. White plastic with light-blue plastic ends pieces and slide. Marked: Staedtler Mars No. 944 03, Japan. Everything new.

616. Stala Darmstadt 3 --- 10 inch rule in case and box, with instructions. No cursor. Scales: L, K, A [B, CI, C] D, P, T, S, and, on the other side of the slide, [LL1, LL2, LL3]. White plastic. Tan, flip-top case, Instructions in German. Green, outer slide box. Except of no cursor, almost perfect.

617. Steel Bars and Sections Rule --- An unusual, two-slide, 20 inch long, 3 1/4 inch wide rule made of heavy, 3/8 inch thick, white plastic. A massive piece. Scales: Weight Lbs. Per Foot, Rounds and Squares, M.M., Flats Width [Flats Thickness, Length Feet] [Number of Bars] CWTS/Tons, Lbs. Three fixed indicators, two on one slide, one on the other. Very good condition. Unusual.

618. Sterling 538 --- 6 inch rule. Scales: A [B, CI, C] D. Flexible white plastic. Equivalents on the back. Excellent condition.

619. Sterling 587 --- Like-new 5 inch rule with case and instructions. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White plastic. Back of rule marked, Dow Chemical. (Others, similar, available.)

620. Sterling 594 --- Like-new 10 inch rule, Decimal Trig Multi-Log, with case and instructions. Scales: LL01, K, A [B, T, T, ST, S] D, DI, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2. White plastic. Gray, flip-top case is slightly dirty and shows a little wear. Instructions have just a few folds. (Others available.)

621. Sterling Precision --- New 10 inch rule, with case and instructions. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. Blue plastic frame with white plastic slide. Case a little dirty. Rule, case, and instructions, new. (Others, new and used, available.)

622. Sterling Decimal Trig Log-Log --- New 10 inch Sterling Decimal Trig Log-Log rule in gray and clear plastic, flip-top case, with instructions. Scales: LL01, K, A [B, T, T, ST, S] D, DI, LL1, and, on the other side, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2. White plastic. Rule, instruction booklet, and case, new. (Others, new and used, available.)

623. Sterling Metric Converter --- New in case, 10 inch rule, with instructions. Converts cu. inches to cu. centimeters, cu. meters to cu. feet, cu. Meters to cu. yards, liters to quarts, ounces to grams, kilograms to pounds, metric tons to short tons, gallons to liters, inches to centimeters, meters to feet, meters to yards, miles to kilometers, sq. inches to sq. centimeters, sq. meters to sq. feet, sq. meters to sq. yards, sq. miles to sq. kilometers. Yellow plastic with white plastic slide. Plastic case and instructions. Everything is new. (Others, used, available.)

624. Sun Hemmi --- New in case, 4 inch narrow rule in case. Scales: A [B, CI, C] D, and, on the back of the slide, [S, L, T]. White laminate on bamboo. Brown leather flip-top case. Everything new.

625. Sun Hemmi --- 5 inch rule with a C cursor. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. White laminate on bamboo. Metal C-shaped cursor. On the back, 14 cm scale, 5 inch scale, and equivalents. Very good condition. A nice older Hemmi rule.

626. Sun Hemmi --- 10 inch rule with C cursor and case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 10 inch scale on top beveled edge. 28 cm scale on bottom edge. White laminate on bamboo. Metal, C cursor. Equivalents on back. Black, two-piece slide box. Box is fair. Rule is in excellent condition.

627. Sun Hemmi --- 10 inch rule in case. Scales: A [B, C] D, and, on the back of the slide [S, L, T]. Sun Hemmi. Made in Japan. Equivalents on the back. White laminate on bamboo. Very good condition. Black, two-piece slide box marked Sun Hemmi' s Bamboo Slide Rule -- just a few wear marks.

628. Sun Hemmi --- 10 inch rule in black cardboard box/case. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 10 inch scale on the top, beveled edge and a 27 cm scale on the bottom edge. Marked Sun Hemmi, Made in Japan. White laminate on bamboo. Cursor cracked. Owner's name on back metal strip. Tape reinforcement inside back split. General condition OK. Black slip box, marked Sun Hemmi Bamboo Slide Rule, solid with wear spots.

629. Sun Hemmi Electrical --- 10 inch electrical rule similar to the Sum Hemmi model sold by Post, 1456, listed in the 1936 Post catalog. Has the C type cursor. Scales: LL2, A [B, CI, C] D, LL3, and, on the back of the slide, [S, L, T]. 27 cm scale on the top beveled edge. L scale on the bottom edge. Electrical gauge markings. Equivalents on the back. Metal C cursor. White laminate on bamboo. Good condition - a few scratches on the back (not on the slide). Black, two-piece cardboard case.

630. Sun Hemmi 30 --- Beautiful, new-in-box, 4 inch rule with leather case, instructions, and box. Scales: A [B, CI, C] D, and, on the other side of the slide, [S, L, T]. Less than 1 inch wide. White laminate on bamboo. Still sealed in original plastic. Brown leather flip-top case, marked Hemmi. Instructions in French. In original green and white Hemmi box. Everything brand new. (Others available.)

631. Sun Hemmi 32 --- Beautiful, new-in-box, 4 inch rule with magnifier, leather case, instructions, and box. Scales: A [B, CI, C] D, and, on the other side of the slide, [S, L, T]. Less than 1 inch wide. White laminate on bamboo. Still sealed in original plastic. Brown leather flip-top case, marked Hemmi. Instructions in French. In original green and white Hemmi box. Everything brand new.

632. Sun Hemmi 40 RK --- New, 10 inch rule. Scales: A [B, CI, C] D, K, and, on the back of the slide, S, L, T. White laminate on bamboo. Equivalents on the back. New.

633. Sun Hemmi P 40 RK --- New in case, 10 inch rule. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. White plastic with gray plastic end piece on the back, Two-piece, blue and gray, hard plastic case. New.

634. Sun Hemmi P45K --- Almost new 8 inch rule in case. Scales: K, DF [CF, CI, C] D, A, and, on the back of the slide, [TI, L, SI]. White plastic with green end pieces on the back. Gray and blue hard plastic case.

635. Sun Hemmi 50 W --- Like new, 10 inch rule in slide box. Scales: A [B, CI, C] D, K, and, on the back of the slide, [S, L, T]. 27 cm scale on the top, beveled edge and a 27 cm scale on the bottom edge. Data on the back. White laminate on bamboo. Excellent condition. Green slide-box, marked Sun Hemmi Bamboo Slide Rule, in very good condition, just some edge and corner rubs. A nice set. (Others available.)

636. Sun Hemmi 64 --- Like-new, 11 inch rule in slide box. Scales: (unmarked) K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. A 27 cm scale on the top beveled edge. On the bottom edge, a cm scale running from 13 to 0 to 13. White laminate on bamboo. Marked System Rietz, No. 64, Sun Hemmi, Japan. Equivalents on the back. Rule like-new. Dark green slide box, marked Sun Hemmi Bamboo Slide Rule, shows some wear. The end label says: Sun Hemmi Japan, System Rietz, No. 64.

637. Sun Hemmi 64 T--- New in box, 11 inch rule in slide box. Scales: K, A [B, BI, CI, C] D, DI, L, and, on the back of the slide, [T2, T1, ST, S]. A 27 cm scale on the top beveled edge. On the bottom edge, a cm scale running from 13 to 0 to 13. White laminate on bamboo. Still sealed in original plastic. Marked No. 64T, Sun Hemmi, Japan. Equivalents on the back. Gray and green, cardboard slide box, marked Hemmi Bamboo Slide Rule. The end label says: Sun Hemmi Japan, No. 64T. Everything new. (Others available.)

638. Sun Hemmi 74 --- Beautiful, new-in-box, 5 1/2/ inch rule, with leather case, instruction book, and box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 14 cm. scale on the top beveled edge. White laminate on bamboo. Still sealed in original clear plastic. Brown leather slip case, marked Hemmi. 40-page instruction book. In original green and white Hemmi box. Everything new. (Others available.)

639. Sun Hemmi 80K --- New in box, 11 inch rule, electricity, with box and instructions. Scales: Motor (Dynamo, Volt), KW (A) [PS (B), CI, C] D, LL3, LL2, and, on the back of the slide, [S, L, T]. 27 cm scale on the top beveled edge. K scale on bottom edge. Equivalents on the back. Marked: Sun Hemmi Japan No. 80K. 48-page instruction manual. Dark green, cardboard slide box, marked, Sun Hemmi Bamboo Slide Rule. Everything brand new. (Others available.)

640. Sun Hemmi 130W - New in box, 10 inch rule, with case, manual, and box. Scales: T, K, A [B, BI, CI, C] D, P, S, and, on the back of the slide, [L, LL0, LL1, LL2, LL3]. White laminate on bamboo. Constants and equivalents on the back. Gray and blue, two-piece, hard plastic slide case. 48 page manual. Green and white outer box. Everything new. (Others available.)

641. Sun Hemmi 135 --- New in case, 5 inch rule. Scales: T, K, A [B, CI, C] D, P, S, and, on the back of the slide, [L, LL1, LL2, LL3]. 14 cm scale on the top beveled edge. White plastic. In original plastic wrap. Brown leather slip case, marked Hemmi and Hitachi Zosen. Everything new.

642. Sun Hemmi 149A --- Beautiful, new-in-box, 5 inch rule, with box, leather case, and instructions. Scales: L, K, A [B, TI, SI, C] D, LL0, LL/0, and, on the other side, LL/1, LL/2, LL/3, DF [CF, CIF, CI, C] D, LL3, LL2, LL1. Very similar to a Post Versalog 1461. White laminate on bamboo. Still sealed in original clear plastic. Brown leather slip case, marked Hemmi. 48-page instruction book. Everything brand new. (Others available.)

643. Sun Hemmi 153 --- Excellent, 10 inch rule in case. Scales: L, K, A [B, CI, C] D, T, Ge, and , on the other side, theta, R theta, P [Q, Q', C] LL3, LL2, LL1. White laminate on bamboo. Rule is excellent. Brown leather case is missing its flip top.

645. Sun Hemmi 250 --- New in box, 10 inch rule in slide box with manual and outer carton. Scales: K, A [B, TI2, TI1, SI] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. White laminate on bamboo. Rule marked: Sun Hemmi, Japan, No.250. Cursor marked: Hemmi Japan. Rule in original plastic. 44-page manual. Two-piece gray and blue slide box. Blue and white outer carton. Everything new. (Others, new and used, available.)

646. Sun Hemmi 250 with Magnifier --- 10 inch rule in leather case. Scales: K, A [B, TI2, TI1, SI] D, DI, and, on the other side, DF [CF, CIF, CI, C] D, L. White laminate on bamboo. Rule marked: Sun Hemmi, Japan, No.250. Cursor marked: Hemmi Japan. Clip-on magnifier. Brown leather Hemmi case with an expansion section for the magnifier. Everything in very good condition.

647. Sun Hemmi 251 --- Almost new, 10 inch rule in case. Scales: K, A [B, T, S, ST, C] D, DI, and, on the back, L, DF [CF, CIF, CI, C] D, LL3, LL2, LL1. White laminate on bamboo. Unusual brown leather slide case, marked Hemmi slide rule 251. The case is in good condition. The rule is almost new.

648. Sun Hemmi P253 --- New 10 inch Vectolog, with clam-shell case and instructions. Scales: K, A [B, TI2, TI1, SI] D, DI, and, on the other side, LL3, LL2, DF [CF, CIF, CI, C] D, L, LL1. White plastic with green cursor guides. Still sealed in original plastic. Slim 71-page manual. Clear top, yellow bottom, clam-shell, plastic case. Everything is new. (Others available.)

649. Sun Hemmi P253 --- New 10 inch Vectolog, with case, instructions, and box. Scales: K, A [B, TI2, TI1, SI] D, DI, and, on the other side, LL3, LL2, DF [CF, CIF, CI, C] D, L, LL1. White plastic with green end pieces and cursor guides. Still sealed in original plastic. 48-page manual. Gray and blue hard-plastic case. Green and white outer Hemmi box. Everything is new and beautiful. (Others available.)

650. Sun Hemmi 255D --- New, 10 inch, electricity rule, with leather case. Scales: L, K, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, and, on the other side, Sh1, Sh2, Th, A [B, TI2, TI1, SI, C] D, DI, Iota (?), Theta. White laminate on bamboo. Marked: Sun Hemmi Japan No. 255D. Still in original plastic. Brown leather, flip-top case, marked Hemmi. Everything new. (Others available.)

651. Sun Hemmi 256 --- 10 inch specialized rule, in case. Scales: L, db, Neper, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, and, on the other side, A, .L [.C, SI, TI] D, lambda, F. White laminate on bamboo. Excellent condition. Black cardboard slide case.

652. Sun Hemmi 259 --- 10 inch rule in case. Scales: LL/1, LL/2, LL/3, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, and, on the other side, L, K, A [B, T, S, ST, C] D, LL0, LL/0. White laminate on bamboo. Marked Sun Hemmi Japan, HJ, No. 259. Very good condition, just a little dirt and a few, tiny, almost imperceptible "cheat notes" lightly scratched into the surface, but not on the scale area. The case is shot. But the rule is nice.

653. Sun Hemmi 259D --- New in box, 10 inch rule in case, with box and instructions. Scales: LL/1, LL/2, LL/3, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, and, on the other side, L, K, A [B, T, S, ST, C] D, DI, LL0, LL/0. White laminate on bamboo. In original plastic. Marked Sun Hemmi Japan No. 259D. Gray and blue plastic slide case marked Hemmi. 48 page instruction manual. Original Sun Hemmi outer carton. A wonderful set. Everything brand new. (Others available.)

654. Sun Hemmi 260 --- New, 10 inch rule in leather case. Scales: LL/1, LL/2, LL/3, DF [CF, CIF, CI, C] D, LL3, LL2, LL1, and, on the other side, LL/0, LL0, K, A [B, T, S, ST, C] D, DI, P, L. White laminate on bamboo. Still sealed in original plastic. Brown leather, flip-top case marked Hemmi. Everything new.

655. Sun Hemmi P261 --- 10 inch rule in case. Scales: T, ST, K, A [B, BI, CI, C] D, L, P, S, and, on the other side, LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1. White plastic with green end pieces. Good condition, a few small scratches. Two-piece, gray and blue, hard plastic case.

656. Sun Hemmi P262 --- New in box, 10 inch rule in case, with box and instructions. Scales: K, A, R1, R2 [T2, T1, ST, S, C] D, L, LL00, LL0, and, on the other side, LL01, LL02, LL03, DF [CF, CIF, CI, C] D, LL3, LL2, LL1. White plastic with blue slide, end piece, and cursor guides. Still sealed in original plastic. Blue and gray plastic slide case, marked Hemmi, No. P262. 44-page instruction manual. In original Sun hemmi outer carton. Everything new and beautiful. (Others available.)

657. Sun Hemmi 266 --- New in box, 10 inch, 266 Electronics rule, with case/box and manual. Scales: LL(bar)3, LL(bar)2, LL2, A [B, BI, CI, C] D, dBL, S, T, and, on the other side, 11 electronics scales that can't be easily reproduced here. White laminate on bamboo. Still sealed in original plastic. Gray and black, two piece slip case/box. 64 page manual. Outer Hemmi box. Everything is new.

658. Sun Hemmi 269 --- New in case, 10 inch, Civil, 269 rule with leather case. Scales: L, F, K, A [B, K', CI, C] D, LL3, LL2, LL1, and, on the other side, CL, SL, M2, TL [R, ST, T, S, C] D, DI, SIN COS. White laminate on bamboo. Still sealed in original plastic. Brown leather flip-top case. Everything new.

659. Sun Hemmi P280 --- 10 inch rule in case. Scales: T, K, A [B, CI, C] D, L, S, ST, and, on the back of the slide, [LL1, LL2, LL3]. Also marked Ahrend. White plastic with blue slide and end pieces. Blue and gray, two-piece, hard plastic slide case. Very good condition.

660. Sun Hemmi P280 and P281 Manual - A large, 7-page instruction set.

661. Sun Hemmi 642T --- Unusual, new in box rule with case, instructions, and outer box. Scales: K, A [B, BI, CI, C] D, DI, L, and, on the back of the slide, [T2, T1, ST, S]. 27 cm scale on the top beveled edge. White laminate on bamboo with a white plastic back piece with green rubber feet. Equivalents on the back. The rule is marked Sun Hemmi Japan No. 642T. It is also marked Ahrend. Gray and blue hard plastic, two-piece case, marked Hemmi. 44 page Hemmi manual. Green and white outer Hemmi box. Everything new. (Another available.)

662. Sun Hemmi 1002 --- New in case, 3 inch circular slide rule, with instructions. Scales: A, D [C, CI]. Heavy white plastic with a blue center. Yellow slip case. Instruction manual. Everything new. Very cute. (Others available.)

663. Sun Hemmi 2634 --- New in box, 5 inch rule with case and manual. Scales: K, DF [CF, CI, C] D, A, and, on the back of the slide, [TI2, TI1, L, SI]. 5 inch scale on the top beveled edge. White laminate on bamboo. Still sealed in original plastic. Brown leather slip case. 44-page manual (for 2664S, 72, 2634, 40F). Green and white outer box. Box and manual both have some storage dirt. Everything new. (Others, new and used, available.)

664. Sun Hemmi 2690 --- New in box, 10 inch rule, with box/case. Scales: L, D [360 degrees, SIN COS, C] D, A, and, on the back of the slide, S, S&T, T. 10 inch scale on the top beveled edge. 27 cm scale on the bottom edge. White laminate on bamboo. Still sealed in original plastic. Gray and green, two piece slide box. With or without green and white outer Hemmi box. Manual available. Everything new. (Others available.)

665. Sun Hemmi Manual 259D, 260, 279D --- 48-page manual for these three rules. (Others available.)

666. Sun Hemmi Manual (Catalog) with Instructions for and Illustrations of Many Rules --- Instructions for the Use of Hemmi Bamboo Slide Rule (Mannheim Type). Copyright 1955. 66 pages with instructions for many, many Hemmi rules (those that are specifically pictured are marked with an i) : Improved Mannheim System (i) - Nos. 30, 32, 34R, 34RK, 50W, 2640, 40RK; Rietz System (i) - Nos. 64, 66, 70, 74; Folded Scales (i) - Nos. 2634, 2664, 45; Darmstadt (i) - Nos. 130, 136; Electro (i) - Nos. 80K and 86K; Stadia (i) - No. 2690. All of the following are also illustrated: 2664, 2634, 64, 50W, 34RK, 30, 80K, 2690, 130, 45, 2640, 40RK, 250, 251, 255, 256, 257, 259, 153, 70, 154. Plus a 2-page chart showing the scales and use for thirty-four models of Hemmi slide rules. A valuable reference.

667. Tavernier-Gravet --- A beautiful, very old, boxwood 10 inch rule, marked Tavernier-Gravet, 8 Rue Mayet, 19, Paris on the front, and on the back, Medailles D'Or 1878 et 1888. Unusual, older heavy metal cursor shaped like a reversed letter C. Equivalents and values on the back, in French. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 25 cm scale on the top beveled edge and on the bottom edge, continuing to 50 cm in the slide well. Appears to be boxwood Good condition -- just a small sliver out of the front and a few small nicks. A very unusual rule.

668. Tavernier-Gravet --- A beautiful, very old 10 inch rule, marked Tavernier-Gravet on the front, and on the back, J.H. Steward, Strand, London and Medailles D'Or 1878 et 1888. Unusual, older heavy brass cursor shaped like a reversed letter C. Equivalents and values on the back, in French. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 25 cm scale on the top beveled edge and on the bottom edge, continuing to 50 cm in the slide well. White laminate on a light yellow wood. Good condition. Partial case. A very unusual rule.

669. Tecnostyl 41/R --- 5 inch rule in case. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, ST, T]. 14 cm scale on the top beveled edge. White plastic. Brown leather slip case. Everything almost new. (Another available.)

670. Thornton, German Import, 1904 or Earlier --- A very interesting 10 inch rule in a leather-covered wooden case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. Reverse 10 inch scale on the top beveled edge. Reverse 26 cm scale on the bottom edge. Reverse 10 inch scale in the slide well. Equivalents on the back. White laminate on mahogany. Marked D.R.G.M. 164885. Heavy metal-framed cursor with a pointer to the reverse 10 inch scale on the top beveled edge. Twelve adjustment (?) screws. Included is a cardboard rule with electrical engineers' equivalents on one side and mechanical engineers' on the other - labeled A. G. Thornton, Practical Manufacturer of Drawing and Surveying Instruments and Materials, St Mary's Street, Manchester. The two-piece slide box is very interesting as well. It appears to be wood with leather covering. The part that is covered by the sliding section has several handwritten inscriptions including, James Ewing Bridgeman, 1904. Except for one missing end on the box, everything is in very good condition.

671. Tudor 1051 --- 10 inch Emblem Series rule in case. Unusual scale arrangement. Scales: K, DF [CF, CIF, CI, C] D, A. White plastic with blue scale highlights. Good condition except for names on the back. Green and white two-piece hard plastic case has some dirt and marks.

672. Unique Electrical --- 10 inch rule in case. Scales: LL2, Fahr., A [B, CI, C] D, Cent., LL3. White laminate on mahogany. Several charts on the back. Black, two-piece slide case. OK condition.

673. Unique Log Log --- 5 inch rule in box. Scales: LL2, A [B, C] D, LL3. White laminate on birch. Trig ratios on the back. Made in England. Very good condition. Blue slide box. Care sheet. (Others available.)

674. Unique Log Log --- New 5 inch rule in box. Scales: LU, A [B, C] D, LL. White laminate on mahogany. Trig ratios on the back. Made in England. Box is worn. The rule is new.

675. Unique Log Log --- 10 inch rule in case. Scales: LL2, A [B, C] D, LL3. White laminate on mahogany. Equivalents on the back. Made in England. Very good condition. Two-piece black slide box. (Others available.)

676. Unique Log Log --- 10 inch rule in case with instructions. Scales: LL2, A [B, C] D, LL3. White laminate on mahogany. Metal cursor guides. Equivalents on the back. Made in England. Excellent condition. Brown, two-piece slide box. Instructions: Half-Hour Instructions for the Use of British Made Unique Slide Rules.

677. Unique Universal I --- 10 inch rule in case. Scales: LU, S, A [B, R, C] D, T, LL. Made in England. White laminate on mahogany. Equivalents on the back. Two-piece slide case. Good condition. (Another available.)

678. Unique Universal Two --- 10 inch rule in box. Scales: LL2, A [B, S, T, C] D, LL3. White laminate on mahogany. Formulas on the back. Excellent condition. Two-piece red slide box, worn.

679. Universal Circle Metric Converter --- A circular slide rule/converter built into a pencil cup, 4 inches high and 2 3/4 inches in diameter. Scales: Length, Area, Weight, Volume. Two rings turn. Black plastic. Very good condition.

680. Universal Circle Slide Rule --- A circular slide rule built into a pencil cup, 4 inches high and 2 3/4 inches in diameter. Scales: K [C] D [D, A] B. Four of the five rings turn. Black, white, and gray plastic. In original box with instructions printed on. An Ole Jorgensen design. Made in Denmark. Very good condition.

681. Uto Rietz 601 --- New in box 5 inch rule, No. 601 Uto, with case, box, and instructions. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, S&T, T]. 5 inch scale on the top beveled edge. White plastic with yellow slide. Made in Denmark. Hoffman Products (US distributor?). On back of rule: Compliments, Avco, Bay State Abrasives Division. Brown leather (?) slip case. Instruction folder. Green box. Everything new. (Others, used, available.)

682. Veb Mantissa --- 10 inch rule. Scales: L, K, A [B, CI, C] D, S, T, ST. White plastic with green slide. Marked Mono Rietz and DDR. Some dirt and scratches.

683. Veb Mantissa --- Like-new, 10 inch Darmstadt II rule in case with instructions. Scales: K, A [B, CI, C] D, L, and, on the other side, P, ST [LL1, LL2, LL3] D, T, S. White plastic with green plastic slide. Marked: DDR, 1731 523/4. Instructions in German. Brown, two-piece slide box.

684. Verlag --- 7 1/2 inch rule in case. Appears to be for electronics. Scales: cm, A [B, cap., ind., C] C, f, lambda, inch, and, on the back of the slide, [sin, lg, tg]. On the back of the rule, I2/I1, dB, P2/P1, plus some tables. Made by Iwa. White plastic in blue plastic slip case. Good condition.

685. Wesley Jenssen Compumatic Slide Rule --- 18 inch by 5 inch wide, heavy plastic slide rule for determining contact lens size. Instructions on the back. Heavy zippered case. Excellent condition.

686. WHSmith Rietz --- New, 5 inch rule in case. Scales: K, A [B, CI, C] D. L. White plastic with yellow scale highlights. Made in England. Black plastic flip-top case. Everything new.

687. Wichmann --- 10 inch rule in case. Scales: K, A [B, C] D, L, and, on the other side of the slide, [S, T]. 26 cm scale on the top beveled edge. 10 inch scale on the bottom edge. White laminate on mahogany. Equivalents on the back. Marked, in the well, System Reitz, Gebr. Wichmann, Berlin, D.R.G.M. Heavy metal framed cursor. Very good condition, as is the two-piece, black slide case.

688. Wichmann --- 15 inch German artillery rule in case. Various artillery-related scales - in German. 36 cm scale on the bottom edge. White laminate on pearwood. Nicely made. Metal-frame glass cursor is 5 inches long. Instructions (in German) on the back. Two-piece, black slide case. Case is worn. Rule is in very good condition, just a little rub on the metal cursor frame.

689. Wichmann --- 20 inch rule in case. Scales: A [B, C] D, and, on the back of the slide, [S, L, T]. 51 cm scale on the top beveled edge. 20 inch scale on the bottom edge. White laminate on mahogany. Heavy metal-framed cursor. Marked: Gebr. Wichmann Berlin D.R.G.M. Very good condition. Two-piece, black slide case.

690. Wichmann 1418 --- 10 inch rule. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [sin, cos, sin/tg, tg]. 27 cm on the top beveled edge, continued to 59 in the slide well. 1:25 scale on the bottom edge. Values in German on the back. White laminate on pearwood. No cursor. Good condition.

691. Wichmann 1427 --- Very nice, 10 inch rule in case. Scales: K, A [B, C] D, L, and, on the back of the slide, [S, S&T, T]. 28 cm scale on the top beveled edge. 1:25 scale on the bottom edge. Equivalents on the back. White laminate on mahogany. Two-piece, black slide box. Very good condition.

692. Wichmann 1870 --- 5 inch rule in case. Scales: A [B, C] D. 14 cm scale on the top beveled edge. Company name on the back. White laminate on mahogany. Slightly warped. Brown leather slip case. Good condition.

693. Wolters - Noordhoff Reitz 87 --- Like-new, 8 inch rule in hard plastic slip case. Scales: K, A [B, CI, C] D, L, and, on the back, 15 cm [S, ST, T1]. White plastic with green slide and end pieces. Green and white, hard plastic slip case, marked WN Rekenliniaal

694. Wolters-Noordhoff 112 --- 10 inch rule in case with instructions. Scales; L, DF [CF, CIF, CI, C] D, A, K, and, on the other side of the slide, [S, ST, T1, T2]. Also, a 25 cm scale on the back. White plastic with a blue slide. Loose cursor, otherwise in good condition. Green and white, hard plastic case.

695. Wolters-Noordhoff JE 650 --- New 10 inch rule in blue hard plastic slip case. Scales: L, T1, T2 [S, CI, C] D, S, ST, and, on the other side, A, DF [CF, CIF, CI, C] D, K. White plastic with blue ends and some blue highlight scales. Marked: Wolters-Noordhoff No. JE 650, Made in Germany. New. Blue hard plastic slip box, marked Rekenliniall WN, shows a little shelf wear. (Another available.)

696. Wolters-Noordhoff 1200 --- New in case, 10 inch Duplex rule with instructions. Scales: LL1, LL2, LL3, DF [CF, CIF, CI, C] D, L, K, and, on the other side, T1, T2, A [B, BI, CI, C] D, P, S, ST. White plastic with green slide and end pieces. Green and white, two-piece, hard plastic slide case. Instructions in German. New.

697. Wolters-Noordhoff 1200 01 --- 10 inch Darmstadt Special rule in case. Scales: LL1, LL2, LL3, DF [CF, CIF, CI, C] D, L, K, LL0 and, on the other side, T1, T2, A [B, BI, CI, C] D, (P), S, ST. White plastic with green slide. Green and white, two-piece, hard plastic slide case. Good condition.

698. X-Act 222P --- Essentially new in box, 5 inch rule in brown leather slip case, instructions, and slide box. Scales: K, A [B, CI, C] D, L, and, on the back of the slide, [S, L, T]. An 11 cm, 4 inch scale on the top, beveled edge. Equivalents tables on the back. Labeled: Machine Divided, X-Act, No. 222P - Denmark. Case marked X-Act, Denmark. Rule, case, instructions, and blue slide box, new , just a few small marks on the leather case.

PLANIMETERS

699. Alpha S400 --- A nice, almost-new, older-style polar compensating planimeter. Includes case and instruction sheet.

700. Coradi, Cora-Senior --- A beautiful, more-modern, Swiss planimeter. Body and several other parts are green metal, while the rest is stainless. Serial # 9686. Complete. Guarantee. Gray case with red lining. Everything appears to be essentially new.

701. Dennert & Pape, Dupa No. 660 --- Made by the German company which later became Aristo. Serial # 8844. From 1924. Some slight surface wear, but very nice. Complete in case.

702. Dietzgen 1801 --- Actually this very nice polar planimeter isn't marked Dietzgen, but it is the same as the Dietzgen 1801 as shown in the company's 14th edition catalog from 1931. It is marked with a serial #, 50279. Aside from a little dirt, the instrument is in very nice condition as is the black case with purple velvet lining.

703. Elliott Bros. --- Older planimeter with 9 1/2 inch upper arm length. Marked Elliott Bros. London. Serial # 29578. Good condition. Worn case.

704. Josef & Jan Fric. --- An older planimeter in a 14 inch long case. The name Josef & Jan Fric. is on a label in the case. Interesting.

705. Gebr. Fromme --- A beautiful older planimeter marked Gebr. Fromme, Wein. Arm 9 inches long. Serial # 34003. In long, black case. Very good condition.

706. Haff 316 --- Haff, Germany planimeter with a tracer lens. Model 316. Serial # 56819. Green case. Instruction sheet in English. Very good condition.

707. Hummel-Esser Aarau --- Older planimeter. Serial # 10849. Very good condition. Case marked Hummel-Esser Aarau.

708. K+E, Older Model in Large Wooden Case --- There are two numbers on the instrument, 1245 and 33. 1245 may be the serial number. Perhaps 33 is the model number. The 1915 K+E catalog, the oldest I have, shows a very similar, perhaps the same instrument as Model 4230, with the following description: Improved Polar Planimeter, German Silver, adjustable tracer-arm about 8 1/2 in., fully graduated, with vernier and clamp with slow-motion screw; ball-pole, pole-weight and balancing weight; with Testing Disc and table of settings for inches and metric measure; in polished mahogany Case, accommodating the instrument when set to any scale. Very good condition.

709. K+E 4212 --- A very nice, older planimeter, K+E 4212, serial # 4447, English System. In a small, black case, 6 inches X 3 inches x 1 1/2 inches. Listed in the 1915 K+E catalog: Polar Planimeter, German silver, fixed tracer-arm, improved needle pole; with horizontal recording wheel engaging with the measuring wheel and registering its revolutions. However, this instrument is slightly different from the one pictured in the 1915 catalog -- it's probably an older version. Just a little dirt, but very nice.

710. K+E 4215 Radial Planimeter --- Complete in case with original outer, K+E green slide box. This is a radial, not the typical polar planimeter. Essentially new.

711. K+E 4236 --- Very nice, in chamois-lined case. Serial # 11741. Very good condition.

712. K+E 4242 1/2 --- Very good condition. Complete. Serial # 1406. Case somewhat worn.

713. K+E 4242 1/2 --- Good condition (missing one fine-adjustment screw.) Serial # 1708. Case slightly worn.

714. K+E 620000 --- Essentially new in case, with tracer lens. Serial # 75731.

715. K+E 62 0005 --- K+E Compensating Polar Planimeter, with cm measure. With tracer lens. Complete with all parts and the original green case. Set looks almost new, just a few small marks.

716. K+E 62 0015 --- Excellent, K+E Compensating Polar Planimeter, Paragon, 62 0015 with case and box. This was K+E's best model. Complete and in excellent condition. The outer slide box shows a little wear.

717. K+E 62 0015 --- Almost new, K+E Compensating Polar Planimeter, Paragon, 62 0015 with case, box, and manual. This was K+E's best model. Complete and in almost new condition. Only the outer slide box shows some wear.

718. K+E 62 0022 --- K+E Adjustable Arm Compensating Polar Planimeter. Complete in case. This model has an adjustable tracer arm and an adjustable pole arm. It differs from the 62 0015 model i that it does not have a tracer lens. Complete with the case all parts. The instrument and the green K+E case look new.

719. Lasico L20A --- Los Angeles Scientific Instruments Co., Model L20A planimeter. A modern instrument in case with instructions. Very good condition.

720. Willis Planimeter --- Improved Willis Planimeter. Patents 1896 - 1901. Manufactured by James L. Robertson & Sons, New York. Case a little worn. Instrument in very good condition.

721. Willis Planimeter --- Improved Willis Planimeter. Manufactured by James L. Robertson & Sons, New York. Patent dates: 1896 and 1901. Serial # 5747. A very nice example of this special type of planimeter. Very good condition, as is the case.

722. Unmarked Planimeter --- 10 inch upper arm. Missing the pole weight. Black case.

723. Unusual Planimeter --- Black painted brass with brass wheels. The arm is mounted on an almost triangular shaped piece. A label inside the box shows: Planimeter No. 301156; Total Flow = Plan. Read. x K x Max. Chart Ruling / Paper Feed; Nozzle Plug Cam (N) K = _____ ; Orifice Tube Cam (O) K = .05291. Wood box (8 X 6 X 2 inches) shows considerable wear. The instrument is in good condition.

BOOKS: SLIDE RULES, PLANIMETERS, AND MECHANICAL CALCULATORS

(Most manuals for individual slide rules are either listed as part of the rule listing or at the end of the section for that make of rule.)

725. An Airship Slide Rule Report --- a 10-page report by E.R. Weaver and S.F. Pickering. Report No. 160, prepared for the National Advisory Committee for Aeronautics. It describes an airship slide rule developed by the Gas-Chemistry Section of the Bureau of Standards. Photocopy.

726. American Blue Print Paper Co. Catalog, 1921 --- 384 page, hardcover catalog of drawing, drafting, and engineering equipment and supplies, including slide rules. Very good condition.

727. Bruning Catalog,14th Edition --- 338 pages of drafting, surveying, and other engineering equipment, including slide rules and planimeters. Includes the 1949 price list. Brown cover. Very good condition.

729. C-Thru Catalogs --- Several 3-ring notebook insert catalogs from C-Thru. Includes a 46 page catalog, Popular Priced Professional Drawing Aids (a few slide rule). Several other drawing-aid brochures and price lists. C-Thru Ruler Company. 1985.

730. Compendium of Drawing & Drawing Instruments --- Compiled by G. Lister Sutcliffe and Roy Underhill. Copyright 1960 by the National Historical Society. Covers 1902 drafting/drawing instruments and their use. The book is new, hardbound, 9 X 11 inches, 295 pages.

731. A Complete Slide Rule Manual --- By Neville Young. 152 pages. Hardcover with dust jacket. 1973. Drake Publishers. Very comprehensive - uses the Faber-Castell 2/83N and 2/82N slide rules for most of the many photographic illustrations. Ex-library copy, in very good condition. 732. A Course in the Slide Rule and Logarithms --- Copyright, 1943. By E. Justin Hills. 6 x 9 inch gray softcover. 108 pages. Illustrations of the following rules: K+E N4041 Mannheim, K+E N4053-3, K+E 4088-3 Polyphase Duplex;; K+E 4070-3 Polyphase Duplex Trig; K+E 4092 Log Log Duplex; K+E 4080-3 Log Log Duplex Trig; K+E 4083-3 Log Log Duplex Vector; Dietzgen Phillips; Midget Circular; Rotorule; K+E N-4100 Stadia; K+E N4102 Surveyor's Duplex; K+E 4094 Merchant's. Published for The United States Armed Forces Institute by Ginn and Company. War Department Education Manual - EM 906. Very good condition.

733. A Course in the Slide Rule and Logarithms --- By Justin Hills. Copyrights 1938/1943. Reprinted for The United States Armed Forces Institute. Education Manual EM 906. 5 1/2 inches X 8 inches. 108 pages, soft-cover. Good condition. Includes pictures of the following slide rules: K+E N4041, K+E 4063-3, K+E 4088-3, Dietzgen Phillips Rule, Midget Circular Slide Rule, RotaRule No. AA B37, K+E N-4100 (Stadia), K+E N-4102 (Surveyor's Duplex), K+E 4094 (Merchant's), K+E N4133 (Roylance Electrical Rule), K+E 4139 (Cooke Radio Rule), Dietzgen Langsner Industrial Slide Rule, Aircraft Navigational Computer (Mark VIII). A nice book.

734. Curta, Instructions for the Use of the --- A fine copy of the original manual.

735. Dietrich-Post Catalog, 1960-61 --- 10 1/2 X 7 1/2 inch, hardbound catalog. Orange cover. 290 pages. Drafting, engineering, surveying, etc. equipment. Includes slide rules, especially Pickett. Also includes Alteneder drawing instruments, Buff & Buff surveying instruments, White surveying instruments, and much more. Excellent condition. (Another available.)

736. Dietzgen Catalog 22D --- 208 page, soft-cover catalog of slide rules, planimeters, and drafting supplies. Copyright, 1956. Complete with 1957 price list. Good condition.

737. Dietzgen Catalog, 12th Edition --- 490 page catalog of Dietzgen tools and supplies. Copyright 1926. Green hard cover with orange lettering. Cover is spotted, but the insides are in very good condition.

738. Dietzgen Catalog, 14th Edition --- 1931. 520 pages. Drawing, drafting, and engineering supplies and equipment, including slide rules. Good condition. Includes paper samples.

740. Dietzgen Catalog No. 389, Drafting Materials (Includes slide rules) --- 100+ page, 6X9 inch, orange and black, softcover manual. 1939. Slide rules include the Langsner Industrial, the Halden Calculex, and the RotaRule. Very good condition. (Others available.)

741. Dietzgen Recommended Drawing Instruments and Materials for Colleges and Schools --- 15 page, 6 x 9 inch brochure. Includes some slide rules.

742. Dietzgen Surveying Equipment Catalog 77S --- 200 pages, soft cover, 6 inches X 9 inches. In addition to extensive coverage of surveying equipment, also includes pocket slide rules and planimeters. Published in 1958. Includes a separate 1959 price book. Almost new.

743. Directions for Using the Miniature Vest Pocket Slide Rule --- Small 8 page pamphlet describing the use of an A-B-C-D scale rule.

746. Engineers' and Manufacturers' Catalog No. 34, McPherson's --- 272 page catalog of engineering and manufacturing tools and equipment. Includes slide rules (a few), drafting equipment, machinists' tools, and more. McPherson's is an Australian distributor. 7 inches X 10 inches. Good condition.

747. Hemmi, Short Directions for the Use of the Hemmi's Bamboo Slide Rules --- 8 x 10 inch brochure. 10 pages. With illustrations of a C-cursor Hemmi Mannheim slide rule. Discussion of Construction and Specialties of Hemmi's Bamboo Slide Rule. Includes instructions for Hemmi's Electro Rule with Log-Log Scale and Hemmi's Improved Slide Rule.

748. How Do You Use a Slide Rule? --- How Do You Use a Slide Rule? By Arthur A. Merrill. For Non-Mathematicians and Casual Calculators. Ten Easy Fifteen-Minute Lessons in Multiplication and Division. 6 inches X 9 inches. Orange and gray soft cover. 35 pages. Dover Publications, Inc. Copyright 1961. Excellent condition.

749. How to Use Basic Slide Rules in 3 Easy Steps --- 15 page, 5X8 inch, softcover pamphlet. Maurice L. Hartung. Pickett. Good condition.

750. How to Use Log Log Slide Rules --- Pickett, 95 page, 5X8 inch, matte black, softcover manual. Maurice L. Hartung. 1953. Excellent condition.

751. How to Use Log Log Slide Rules --- Pickett, 64 page, 5X8 inch, black and beige, softcover manual. Maurice L. Hartung. 1953. Pictures of the N3ES, N803ES, and N800ES rules. Very good condition.

753. How to Use the Pickett Model 1000 Slide Rule --- 31 page, 4X6 inch, softcover manual. 1948. Very good condition.

754. How to Use Pickett Trig Slide Rules --- 40 page, 5X8 inch, beige and green, softcover manual. Maurice L. Hartung. 1953. Good condition.

755. How to Use the Slide Rule --- 100 page, softcover by Forum House, London, Toronto. 1968. 5 1/2 inches X 8 1/2 inches. Includes instructions for log log scales. Lots of practice problems.

757. Introducing the Slide Rule --- 32-page, 6 inch X 9 inch booklet. Yellow soft cover. Published by Winsco (Wabash Instruments & Specialties Company), Wabash, Indiana. Copyright 1943. Very good condition.

759. Instructions for Slide Rules --- Instructions for Post-Trig and Mannheim-Trig Slide Rules, by Ross R. Middlemiss, Washington University. Published in 1945 by Post. 5 inches by 7 inches, 81 pages, softcover. Very good condition. (Another available.)

760. Instructions for Using Log Log, Duplex Slide Rules --- A 20-page, red softcover, 5 x 8 inch manual, printed in Japan. Good, simple explanations of scale use through log log.

761. Instructions for Using a Slide Rule --- A 4 inch X 6 inch, 16-page booklet. Copyright W. Stanley & Co. Cover dirty, otherwise in good condition. (Others available.)

762. It All Adds Up --- New, hardcover book: It All Adds Up, The Growth of Victor Comptometer Corporation. 243 pages. Hardbound. Copyright 1968. Historical. Includes discussions and pictures of the Victor Model 110, "the first truly portable (35 pounds) adding machine;" several Victor mechanical machines in ads; The Comptometer; etc. Among other topics covered are the mergers with the McCaskey Register Company and the Comptometer Corporation -- all were Chicago firms. A good historical reference. (Another available.)

763. The Japanese Abacus Explained --- 5 1/2 X 8 1/2 inch softcover book. By Y. Yoshino. Dover, 1963. 240+ pages. Well illustrated. Very good condition.

764. The Japanese Abacus, Its Use and Theory --- 5 x 7 inch softcover manual. By Takashi Kojima. Charles E. Tuttle Company. 1954. 102 pages. Like new.

765. Keuffel & Esser Catalog, 36th Edition Price List and New Goods Not Contained in the Catalog --- May 15, 1925. 101 pages, of which the first 60 pages are items added to the K+E line after the publication of the 36th edition catalog in 1921.

766. Keuffel & Esser Catalog, 37th Edition --- Catalogue of Keuffel & Esser Co., Manufacturers and Importers: Drawing Materials, Surveying Instruments, Measuring Tapes (and, of course, Slide Rules, Planimeters, Drafting Sets). Thirty-seventh edition, 1927. Maroon hardcover. Complete, except for separate price list. Generally good condition -- a little spine breaking in front and back. 548 pages. (Another available.)

767. Keuffel & Esser Catalog, 38th Edition --- Catalogue of Keuffel & Esser Co., Manufacturers and Importers: Drawing Materials, Surveying Instruments, Measuring Tapes (and, of course, Slide Rules, Planimeters, Drafting Sets). Thirty-eighth edition, 1936. Maroon hardcover. Complete, including June,1937 price list. Very good condition. 581 pages. (Others available.)

768. Keuffel & Esser Catalog, 39th Edition --- Catalogue of Keuffel & Esser Co., Manufacturers and Importers: Drawing Materials, Surveying Instruments, Measuring Tapes (and, of course, Slide Rules, Planimeters, Drafting Sets). Thirty-ninth edition, 1943. Interim Edition War Catalog. Red and green hardcover. Good condition. 221 pages.

769. K+E Catalog, 41st Edition, 1949--- In two parts, both with off-white soft covers. Part 1; Drafting and Reproduction Equipment and Materials, Slide Rules. 256 pages. Part 2: Surveying Equipment, Field Books, Measuring Tapes. About 170 pages. Everything in very good condition.

770. Keuffel & Esser Catalog, 42nd Edition --- Green, hardcover. Full catalog. 475 pages. Distributed by B.L. Makepeace, Inc., Boston. Very good condition. (Others, similar, available.)

771. Keuffel & Esser Catalog, 42nd Edition --- K+E Catalog, 42nd Edition, Part 1, Drafting and Reproduction Equipment and Materials, Slide Rules. 1954. 300 pages. Green, soft cover. With separate price list. (Another available.)

772. K+E Elementary Instructions for Operating the Slide Rule --- 19 page, softcover manual. Copyright 1944. For Mannheim rules with the following scales: A, B, CI, C, D, K, S, L, T. Very good condition.

773. K&E: How to Take Care of Your K&E Slide Rule, Duplex --- New, small, 10-page pamphlet, 2 inches X 4 inches, red and white cover. (Others available.)

774. K&E: How to Take Care of Your Slide Rule --- A small, 12-page pamphlet, 3 inches X 4 inches, red cover, with a picture of a Deci-Lon on the cover. (Others available.)

775. K+E Guarantee --- New, 4 inch X 5 1/2 inch sheet with K+E Lifetime Guarantee. (Others available.)

776. K+E, Slide Rules and Calculating Instruments Catalog --- Copyright 1934. Brown soft cover. 26 pages. Shows a wide variety of rules, including the Sperry Pocket Calculator and the Thacher Good condition.

777. K+E Slide Rules and Calculating Instruments Catalog, 1939 --- 24 pages of K+E slide rules and related items. Rose and maroon soft cover. Very good condition, just a little dirt on the cover. (Another available.)

778. Learn Basic Slide Rule on Your Own --- Learn Basic Slide Rule on Your Own, A Modern Programed Instruction Manual. 10 inches by 5 inches. 163+ pages. Developed for Post and uses the Post 1447 as the diagram model. Very good condition with just a little cover wear.

779. The Mannheim and the Duplex Slide Rules, Complete Manual --- By William Cox. 1917. Published by K+E. 65+ pages. Includes catalog pages showing the following K+E rules: Mannheim, Duplex, Polyphase, Stadia, Roylance Electrical, Surveyor's Duplex, Merchant's, Chemist's Duplex. Very good condition.

780. A Mannheim Type Slide Rule --- 6 page booklet. 5 1/2 inches X 8 1/2 inches. (Another available.)

781. A Manual of the Slide Rule, Thompson --- A Manual of the Slide Rule, Its History, Principle, and Operation. J.E. Thompson. Copyright 1930, Van Nostrand. 220 pages. Green hardcover. Includes discussions of K+E's Roylance Electrical Slide Rule, Stadia Rule, Surveyor's Duplex Rule, Chemist's Duplex Rule, and Power Computing Duplex Rule, as well as the Charpentier Rule, the Sperry Pocket Calculator, the Thacher Cylindrical Rule, and the Fuller Cylindrical Rule. Excellent condition. (Others available.)

782. A Manual of the Slide Rule, Thompson (Plus Two Other Books) --- A Manual of the Slide Rule, Its History, Principle, and Operation. J.E. Thompson. Copyright 1930, Van Nostrand. 220 pages. Includes discussions of K+E's Roylance Electrical Slide Rule, Stadia Rule, Surveyor's Duplex Rule, Chemist's Duplex Rule, and Power Computing Duplex Rule, as well as the Charpentier Rule, the Sperry Pocket Calculator, the Thacher Cylindrical Rule, and the Fuller Cylindrical Rule. The book is bound together with two other books in a single, hardcover volume titled, Speed and Fun with Figures. The other two books are: Rapid Arithmetic by T. O'Connor Sloane, copyright 1922, 184 pages, and Recreations in Mathematics, by H.E. Licks, copyright 1917, 154 pages. Blue hardcover. Very good condition. (Others available.)

784. Mathematics for Electricians and Radiomen (Cooke) --- By Nelson M. Cooke. McGraw-Hill. 1942. 604 pages. Hardcover. Includes a chapter on the slide rule which contains a recommendation that a slide rule, such as the Cooke Radio Slide Rule, be purchased. Very good condition.

785. Otis King Spiral Slide Rule Brochure --- a new, 6 page brochure describing How the Otis King Spiral Slide Rule Saves Time and Mistakes in All Calculations. Describes the Model K and Model L. Shows how the rule works. Photo of the rule on the cover. Brand new. (Others available.)

786. Otis King's Calculator Manual --- Fine copy of operating instructions for Models K and L.

787. C.F. Pease Company Drafting Equipment Catalog G --- 6 inch X 9 inch hardcover catalog. 371 pages. Copyright 1926. Complete with separate price list. A beautiful book with a blue and gold embossed cover. Excellent condition. Includes slide rules, planimeters, and the Pease Slide Rule Holder.

788. The Phillips Slide Rule --- 80 page, 5X8 inch, green softcover manual. By Allan R. Cullimore. 1925. Eugene Dietzgen Co. Very good condition.

789. Pickett All-Metal Slide Rules Catalog (1940's) --- 3 x 6 inch folded brochure, 15 pages. Includes the following rules: 800, 500, 1000, 200, 300, 400, 901, 902, 6 (Statistical & Quality Control), Model 2, Model 3, Model 4, 510. Good condition.

790. Post Catalog, 18th Edition --- 416 pages plus the 1937 price list. Copyright, 1936. Blue cover. Includes pre-Hemmi slide rules as well as other traditional drafting and surveying equipment Good condition. (Another available.)

791. Post, Film on Making Slide Rules --- 16mm on a 9 inch reel.

792. Practical Treatise on the Steam Engine Indicator (With Planimeter Section)--- 5 inches X 8 inches, maroon hardcover, 155 pages plus. By N. Hawkins. Published by Theo. Audel & Co., 1898. Includes great illustrations of steam engine indicators and accessories, pantograph, revolution counter, and several planimeters -- Amsler, Lippincott, Robertson-Amsler, Willis, and Coffin Averaging. Book in good useable condition. Great planimeter reference.

793. Practical Treatise on the Steam Engine Indicator (With planimeter section) --- Also titled: Hawkins' Indicator Catechism, A Practical Treatise for the Use of Erecting and Operating Engineers, Superintendents, Students of Steam Engineering, Etc., Relating to the Description of the Instrument and Directions for Its Application for Obtaining the Best Results in the Economiocal Production and Use of Steam. Theo. Audel & Co., 1902. 167+ pages. Includes section on the use of the pantograph and 20 pages on using various planimeters - Ansler, Lippincott, Willis, and Coffin Averaging. Good condition.

794. Practical Treatise on the Steam Engine Indicator (With planimeter section) --- Also titled: Hawkins' Indicator Catechism, A Practical Treatise for the Use of Erecting and Operating Engineers, Superintendents, Students of Steam Engineering, Etc., Containing the Description of the Instrument and Directions for Its Application for Obtaining the Best Results in the Use of Steam. Theo. Audel & Co., 1904. 173+ pages. Includes section on the use of the pantograph and 20 pages on using various planimeters - Ansler, Lippincott, Willis, and Coffin Averaging. Good condition.

795. A Programmed Sequence on the Slide Rule --- 6 inches X 9 inches. Green soft cover. 64 pages. By Eugene Roberts. Copyright 1962 by The Regents of the University of California. Published in cooperation with W.H. Freeman and Company. Developed "to facilitate computational work in the high school chemistry course." Very good condition. (Another available.)

796. Self Paced Slide Rule Learning --- By Cybern Education, Inc. for Frederick Post/a Teledyne Company. 10 x 5 inch, red soft-cover, 163+ page manual. Uses a Post 1447 rule for the many illustrations. Copyright 1967. Very good condition.

797. Sikes' Tables of the Concentrated Strength of Spirits with Directions for the Use of the Hydrometer --- 95-page hardcover book. "Established throughout the United Kingdom for Estimating the Duties on Spirituous Liquors, By Act of Parliament, 58 Geo. III, cap.28." Also has instructions for the use of a proof slide rule. Revised edition. No date.

798. Simplifying The Slide Rule --- Pocket-sized paperback, 139 pages, copyright 1964 by Bantam. Written by Robert W. Marks. Introducing the Unifact Method, the Easiest and Most Effective Way Yet Devised for Learning the Slide Rule. Designed to be used with a K+E Polyphase Duplex Decitrig Slide Rule. Almost new. (Another available.)

799. Simplify Math: Learn to Use the Slide Rule --- By Electronics Teaching Library. Editors and Engineers, Ltd., First Edition, First Printing, June, 1966. 5 inch X 7 inch, brown and white soft cover, 96 pages. Skillfact Library, 642. Excellent condition, just a slight amount of cover yellowing.

800. The Slide Rule --- The Slide Rule. By Burns and Snodgrass. 1958. The English Universities Press Ltd., Teach Yourself Books. 4 1/2 inches X 7 inches. Blue hardcover. Black and yellow dust jacket. 207 pages. Pictures of Unique slide rules. Excellent condition.

801. The Slide Rule --- The Slide Rule. By Rufus T. Strohm. Published by International Textbook Company. Blue hardcover. 5 inches X 7 1/2 inches. 84 pages. Includes a fold-out illustration of what appears to be a Richardson metal rule. Other rules illustrated include the K+E 4053-3 and 4070-3, among others.

802. The Slide Rule --- The Slide Rule. By Rufus T. Strohm and Archibald DeGroot. International Textbook Company, 1939. 92-page, blue hardcover. Illustrations fo the following rules: Richardson (foldout), general Mannheim, K+E 4053-3, K+E 4070-3, K+E 4080-3, Gilson Midget circular. Very good condition.

803. The Slide Rule --- The Slide Rule, An Elementary Treatise, by J.J. Clark. Burgundy hardcover. 62 pages. Published by Technical Supply Company,1921. Includes a fold-out showing several slide rules of the day. Good condition, just a few small tears on two pages.

804. The Slide Rule --- Paper cover, 5 inches X 7 1/2 inches. By I.C.S. Staff. Copyright 1948. 92+ pages. Shows a K+E 4053-3 as the example rule. In just fair condition -- folded once, cover loose, ink stains on cover, small tears on page edges.

805. The Slide Rule --- 6 x 9 inch, black and white softcover manual. 91 pages. United States Armed Forces Institute, Madison, Wisconsin, 1962. By Warren C. Young. Revised by Donald N. Niederkorn. Good condition.

806. The Slide Rule: Applied to Commercial Calculations --- By R. M. Shireey. Sir Isaac Pitman & Sons, Ltd.,, 1935. 66++ pages. Includes sections on How to Choose a Slide Rule, How to Keep a Slide Rule, and Theory of the Slide Rule. Green hardcover.

807. Slide Rule: Calculation Made Simple (A Pickett Slide/Tape Presentation) --- Slide Rule: Calculation Made Simple, A Daylight Chalkboard Projectible (sic) Slide Program. Copyright by Pickett, 1972. 80 35mm slides in a Kodak Carousel projector tray; a two-sided audio tape cassette; a 29-page Teacher's Manual; a set of ditto masters; original invoices/papers; original outer box, blue and green, marked Pickett. Like-new, except for a very small amount of shelf wear and staining on the box.

808. The Slide Rule, A Complete Manual --- By Alfred L. Slater. Holt, Rinehart and Winston, 1967. 291 pages, large format. Spiral bound. Spiral binding has some breaks and the book has library markings. However, the interior is like new. Includes information on all the log scales as well as the folded scales (CF/M AND DF/M), the hyperbolic scales (SH and TH), and the Pythagorean scale (P). Large illustrations of the following rules: Dietzgen Microglide Decimal Trig Log Log (1734), K+E Deci-Lon (68 1100), Pickett 803-ES Dual Base Log Log, Pickett N4-ES Vector Log Log Dual Base Speed Rule, and the Post Versalog (1460).

809. The Slide Rule, A Complete Manual --- By Alfred L. Slater. 291 page, 9X11 inch, spiral-bound, red, softcover manual. 1967. Holt, Rinehart, Winston. Includes sections on the log log scales, hyperbolic scales, and photographs of the Dietzgen 1732, K+E Deci-Lon 68-1100, Pickett 803-ES, Pickett N4-ES, and Post Versalog 1460. Good condition. (Another available.)

810. The Slide Rule and How to Use It (with special rule) --- By Charles Hoare. Published in London by Crosby Lockwood and Son, 1926. Green hardcover. 104+ pages. Complete with a special cardboard slide rule with a split slide so that the B and C scales can move independently. Good condition.

811. The Slide Rule and How to Use It (Introducing a New Double-Slide Slide Rule Arrangement) --- By Charles Hoarse. London. The Technical Press Ltd., hardcover, 5 inches X 7 inches. 104 pages. Subtitled: Full, Easy, and Simple Instructions to Perform All Business Calculations with Unexampled Rapidly and Accuracy. With sections on machinery, weights of metal, steam engines, brickwork, timber, strength of ropes, contractors' wages, exchange of money, specific gravity, accelerated motion, traveling of sound, and many more.

812. Slide Rule, How to Use It --- Paperback, 5 inches X 8 inches. By Calvin C. Bishop. Published by Barnes and Noble, copyright 1955. 149 pages. Includes illustrations of and instructions for use of the following types of rules: Polyphase, Polyphase Duplex Trig, Log Log Duplex Trig, Log Log Duplex Vector, Post Versalog, Langsner Industrial. Very good condition. (Others available.)

813. The Slide Rule and How to Use It --- The Slide Rule and How to Use It: A Text-Work Book. Sommers, Drell, and Wallschlaeger. Follett Publishing Company, 1959. Hardback, spiral-bound. 208 pages. Good condition. (Another available.)

814. The Slide Rule and How to Use It --- By Rufus T. Strom. International Textbook Company, Scranton, PA, 1924; Great Britain, 1923. Maroon hardcover. Ex-library. 59 pages.

815. A Slide Rule with Intellect and ... Horse Sense --- The consistent K+E Log Log Duplex Decitrig. By Don Herold. A 12-page, 5 x 8 inch booklet advertising the virtues of the K+E Log Log Duplex Decitrig rule. Includes a three panel foldout of the rule. (Another available.)

816. Slide Rule: A Practical Guide to Its Use, With Examples, Problems, Answers --- By Calvin C. Bishop. Orange softcover. Copyright 1952 by Barnes & Noble. Second edition. College Outline Series. 149 pages. Includes the following well-known slide rules explained by charts and sample settings: Polyphase, Polyphase Duplex Trig, Log Log Duplex Trig, Log Log Duplex Vector, Hemmi Log Log Vector, Langsner Industrial. Almost new.

817. The Slide Rule: A Practical Manual --- By C.N. Pickworth. 1908. A wonderful, 112+ page, green hardcover book which includes many advertisements for slide rules, etc. of the day: Halden Calculex, K+E 4070 with a blade cursor, Thacher's, Nestler with a magnifying cursor, Brunsviga Calculator, Harling's slide rules, Tavernier-Gravet slide rules, Anderson's Improved Slide Rule, and others. The book itself covers, aside from the "standard slide rule," discussions of Multiple Cursor Lines, the Broken Line Cursor, the Pointed Cursor, the Goulding cursor, obtaining powers and roots by scaling off proportional lengths on the D scale, the Jackson-Davis Double Slide Rule which uses a pair of aluminum clips to enable the log log slide to be temporarily attach to the lower edge of the ordinary rule, the Yokota Slide rule, the Faber Log Log Rule, the Perry Log Log Rule, the Rietz Rule, the Precision Slide Rule, the Universal Slide Rule, the Beghin Slide Rule, the Anderson Slide Rule, the Multiplex Slide Rule, the Long Slide Rule, Hall's Nautical Slide Rule, Fuller's Calculating Slide Rule, the R.H.S. Calculator, Thacher's Calculating Instrument, Sectional Length or Gridiron Slide Rules, Hannyngton's Extended Slide Rule, Cherry's Calculator, Propell's Pocket Calculator, the Boucher Calculator, the Halden Calculex, Sperry's Pocket Calculator, the Engine Power Computer, the Smith-Davis Piecework Balance Calculator, the Baines Slide Rule, and Maitland's Hydraulic Slide Rule.

818. Slide Rule Simplified --- Slide Rule Simplified. Charles O. Harris. Published by the American Technical Society, 1943. Appears to be the first edition, first printing. 250+ pages. Gray hardcover with yellow and black print. Excellent condition. Includes the dust cover. (Others, including the second and third editions, available.)

819. Slide Rule Simplified --- Slide Rule Simplified. Charles O. Harris. Published by the American Technical Society, 1943/1961. Reprinted for The United States Armed Forces Institute. 270+ pages. Tan soft-cover with red print. Very good condition.

820. Slide Rule Simplified --- 9 x 6 inch, spiral bound, black soft cover manual. Copyright 1969. 137 pages. By John Skelton. Melbourne, Australia. Picture of a Hemmi 40RK on the cover. This and the Hemmi 250 are used a working examples. The cover page states: Mini Computer for everybody. Fast programmed instruction workbook featuring practical applications. New math techniques.

823. Slide Rule, A Textbook for Classroom and Self-Instruction --- 8 1/2 x 11 inch, spiral-bound, softcover manual. 110 pages. C.L. Johnston. Copyright 1960. With pictures of the following rules: Dietzgen N1725, Vector Type Log Log; Aristo 970, Log Log; K+E Deci-Lon 1130; Post Versalog 1460; Pickett 803-ES Log Log; Pickett N4-ES Vector-Type Log Log.

824. Slide Rule, A Textbook for Classroom and Self Instruction --- Soft-cover, spiral-bound, 8 1/2 inch X 11 inch book. Blue cover. By C.L. Johnston, copyright 1960. 110 pages. Includes pictures of the following rules: Dietzgen Maniphase Multiplex, Decimal Trig Type Log Log, 1732; Aristo 970 Log Log: K+E Log Log (4081?); Post Versalog 1460:; Pickett Model 803-ES; and Pickett N4-ES. Very good condition -- a little aging discoloration on the cover.

825. Slide Rule, A Textbook for Classroom and Self Instruction --- Soft-cover, spiral-bound, 8 1/2 inch X 11 inch book. Buff-colored cover. By C.L. Johnston, copyright 1953. 86 pages. Includes pictures of the following rules: Dietzgen Maniphase Multiplex, Decimal Trig Type Log Log, 1732; K+E Log Log (4081?); Pickett Model 800; and Pickett 1010. Good condition -- some aging discoloration.

826. The Slide Rule: Tutor Text --- The Slide Rule, A Tutor Text. By Saffold and Smalley. Hard cover, 468 pages. Almost new -- just library markings. Copyright 1962 by U.S. Industries, Inc. Published by Doubleday. (Another available.)

827. Speed and Fun with Figures --- Three books in one: (1) A Manual of the Slide Rule, Its History, Principle, and Operation. J.E. Thompson. Copyright 1930, Van Nostrand. 220 pages. Includes discussions of K+E's Roylance Electrical Slide Rule, Stadia Rule, Surveyor's Duplex Rule, Chemist's Duplex Rule, and Power Computing Duplex Rule, as well as the Charpentier Rule, the Sperry Pocket Calculator, the Thacher Cylindrical Rule, and the Fuller Cylindrical Rule. (2) Rapid Arithmetic by T. O'Connor Sloane, copyright 1922, 184 pages, and (3) Recreations in Mathematics, by H.E. Licks, copyright 1917, 154 pages. Blue hardcover. Very good condition. (Others available.)

828. Stanley's Slide Rule Practice --- 32-page, 5 1/2 inch X 8 1/2 inch soft-cover manual. Black and Gold cover. Published by W. Stanley & Company, Peru, Indiana, 1938. Very good condition.

829. Study Guide for The Slide Rule --- To be used with USAFI Course MB 858 or CB 858. Published for the United States Armed Forces Institute. 1952. 62 page, soft-cover manual. Blue cover.

830. Sun Hemmi Manual (Catalog) with Instructions for and Illustrations of Many Rules --- Instructions for the Use of Hemmi Bamboo Slide Rule (Duplex Type). Copyright 1957. 108+ pages. Chapters on using the following Hemmi rules: 250, 251, 255 and 275, 256, 259 and 279, 154, 153, and 200. Plus a 2-page chart showing the scales and use for 30 models of Hemmi slide rules. Plus illustrations of the following rules: 2664S, 2634, 64, 50W, 34RK, 30, 80K, 2690, 130, 45, 2640, 40RK, 250, 251, 255, 256, 257, 259, 153, and 70 and 154 as a fold-out (20 inchers). A valuable reference.

831. A Teaching Guide for Slide Rule Instruction (Pickett) --- 8 1/2 inches X 11 inches. Softcover. 43++pages. By Maurice Hartung. Copyright by Pickett, 1960. This the book that came with the large Pickett demonstration rules. Includes, separately, three sets of Problems-Answers. The manual itself pictures and describes 15 different Pickett slide rules, plus a chart comparing the rules.

832. A Treatise on the Calkins Steam-Engine Indicator --- A Treatise on the Calkins Steam-Engine Indicator, with Descriptions of Calkins' Improved Graduated Pantograph, Polar Planimeter, Speed Measure, Revolution Counter, Parallel Rule, Indicator Spring Weighing Device, Mercurial Column. New York: The Engineers' Instrument Co., 1891. Hardcover. 114 pages. Front endpaper torn, otherwise good condition. Very nice drawing and instructions for the listed instruments. This copy came from the Scientific Library of the United States Patent Office.

833. Trigonometry-Slide Rule-Mechanics --- 187 page, 5X8 inch, blue hardcover manual. 84 pages are devoted to the slide rule. Includes a large, triple-foldout picture of what appears to be a Richardson slide rule, plus pictures of an early Faber? and K&E rules. Slide rule section, copyright 1939, International Textbook Company. Very good condition.

835. William Oughtred (Biography of the inventor of the slide rule) --- New. William Oughtred: A Great Seventeenth-Century Teacher of Mathematics. By Florian Cajori. The Open Court Publishing Company, 1916. New, original edition of the 100 page, hardcover book with dust jacket. (Another available.)

ARTILLERY RULES

836. FT 90AA-B-3 --- 11 1/2 inch artillery rule, in case. Marked: 400, 7669202, FT90AA-B-3. Lots of scales on both sides of the rule, plus a cursor, but this rule never had a slide. White paint on hardwood, two-sided. Rule marked: 3GUN,90M.M.2. Case is green canvas, marked: Case, Carrying, M-67. Also includes an 11 1/2 inch plastic laminated rule marked, Tables, Correction. Everything in excellent condition.

837. HOW 8 Inch --- Set of two large rules, each 3 1/2 inches X 18 inches, in a case. White laminate on hardboard. Cursors 4 inches X 4 1/2 inches. First rule marked How 8 Inch, Charge 1 on one side and How 8 Inch, Charge 2 on the other. Second rule marked How 8 Inch, Charge 3 on one side, blank on the other. In a military green, fabric case. Excellent condition. (Others available.)

838. HOW 155mm --- A real slide rule, with both a slide and a cursor, in case. 2 inches X 14 1/2 inches. Laminate on hardwood. Scales on both sides of the slide. Instructions on the back of the rule. Marked: FT 155-AH-1. Cursor stiff. In very good condition except for a slight surface tear on one end, not interfering with the rule's use. In a green canvas case.

839. HOW 155mm --- 3 1/2 inch X 18 inch artillery rule, in case. White laminate on hardboard. Cursor 4 inches X 4 1/2 inches, stuck, needs to be worked loose. One side of the rule is marked Charge 4 and the other Charge 5. In a military green, fabric case. Very good condition.

840. HOW 155mm --- 3 1/2 inch X 18 inch artillery rule, in case. White laminate on hardboard. Cursor 4 inches X 4 1/2 inches. One side of the rule is marked Charge 1 and the other Charge 3. In a military green, fabric case. Rule in very good condition except for some laminate loss on one corner and a little staining on one end. Nothing interferes with the rule's use, however.

AVIATION

841. Aero Products Research E6-B2 Computer --- New, all-aluminum, E6-B2 Flight Computer, Aero Products Research, Inc. With folding case, which also holds the 44-page instruction manual, apr np-13 plotter folder, registration guarantee, and Aero Products Research catalog. 5 inch circular device with 4 1/2 inch X 9 inch rectangular piece through it. Copyright, 1967. Everything is new.

842. Air Line Flight Calculator --- A 4 1/2 inch circular device with a 5 1/2 inch X 2 inch leg extension. Heavy white plastic. Copyright 1940 by United Air Lines Transport Corporation. Manufactured by The Whitehead & Hoag Co. Two sided. This is one of the more complex-looking devices with lots of variables and gadgets.

843. Air Navigation, Dead Reckoning Computer --- All aluminum, 3 3/4 inch circular device with a 2 1/2 inch by 7 1/2 inch rectangular graph going through it, with case. Type CPU-26 A/P. Made by Felsenthal Instruments Company. Excellent condition. Instructions on the case. Case a little dirty.

844. American Airlines Type B Navigational Computer --- A very nice, 4 1/4 inch circular device made up of four heavy plastic, turning disks. In a beautiful tan, pigskin leather, snap case which also encloses a 32-pagebooklet of instructions. The case is stamped in gold, American Airlines, Inc. Rule copyrighted 1941 by American Airlines. The booklet is titled, Instructions for Use of Navigational Computer Type "B," Compiled by Engineering Department, American Airlines, Inc., March 4, 1943. The booklet has a little staining and the case is just slightly dirty. Otherwise, everything is in very good condition. A very nice set.

845. ASA E6-B Flight Computer --- A 5 inch circular device with a 9 1/2 inch X 4 inch rectangular graph going through it, with case. All silver metal. Two-sided. Copyright 1987 by Aviation Supplies and Academics, Seattle, Washington. Black rubber slip case. Includes an ASA CP-1 Plotter, plastic with one chipped corner.

846. Computer, Air Navigation, Dead Reckoning, Type MB-4 --- 5 inch aluminum circular device with an 11 inch X 4 inch plastic rectangular graph going through it. U.S. Property. G. Felsenthal & Sons, Inc. In tan, vinyl case. Everything in good condition, just a little dirt.

847. Computer, True Airspeed, Type G-1 --- A black, 8 inch, circular device with two wheels and a cursor. Computer, True Airspeed, A.C. Type G-1. Made by G. Felsenthal & Sons, Chicago. Heavy plastic. Good condition.

848. Dalton Aircraft Navigational Computer, Mark VII --- A 5 inch circular device with a 9 1/2 inch X 4 inch rectangular graph going through it, with case and instructions. White plastic. Also marked Dalton Aerial Dead Reckoning Slide Rule, Model B. Two sided. 23-page instructions marked: Instructions for the Aircraft Navigational Computer, Mark VII; Weems System of Navigation; Annapolis, Maryland; Copyright 1934 by Philip Dalton. Rule and instructions in good condition. Tan leather case is stained and worn.

849. Dalton Dead Reckoning Computer, Type E-68 --- A 5 inch circular device with a 9 1/2 inch X 4 inch rectangular graph going through it, with case and instructions. Metal and plastic. Two-sided. Used in flying. Labeled, Weems System of Navigation, by Phillip Dalton, Annapolis, MD. In brown leather slipcase. 23-page manual. Everything in very good condition.

850. Dead Reckoning Computer --- A black 5 inch circular device with a 9 1/2 inch X 4 inch yellow and green rectangular graph going through it, with two manuals and case. Metal and plastic. Two-sided. Labeled Computer, Dead Reckoning, AN5835-1, F.S.S.C. No. 88-C-1120, G. Felsenthal & Sons. In brown leather slipcase. Two sets of instructions: (1) Handbook of Instructions Army Types E-6B and AN 5835-1, Navy Type FSSC 88-C-1120 Dead Reckoning Computer, December 5, 1943, and (2)Navigational Dead Reckoning Computer Supplement No. 3, Air Navigation Bulletin, June, 1944. Everything in excellent condition. In original cardboard box.

851. Dead Reckoning Computer --- A black 5 inch circular device with a 9 1/2 inch X 4 inch yellow and green rectangular graph going through it. Plastic. Two-sided. Labeled Computer, Dead Reckoning, AN5835-1. G. Felsenthal & Sons. Good condition -- a little dirt and one screw missing.

852. Jeppesen Aircraft Computer, Model CR-2 --- A 4 1/4 inch circular computer device used in flying. Two circles and a cursor on one side, three circles on the other side. Many variables indicated. In a brown, vinyl case. Excellent condition.

853. Jeppesen Slide Graphic Computer, Model CSG-4P --- A 5 inch circular device with a 9 1/2 inch X 4 inch rectangular graph going through it. Plastic. Two-sided. Used in flying. In black slip case. In excellent condition.

854. Jeppesen Navigation Plotter PN-1 --- A two-sided, clear plastic, 13 inch rule with a protractor attached, used in navigation. Very good condition. (Another available.)

855. Mark VIII-C Computer --- 4 1/2 inch circular device. Produced by Pan/American Navigation Services and Weems Systems of Navigation. Heavy white plastic. In original brown paper slip case.

856. Professional Flight Computer --- 3 3/4 inch, heavy plastic circular device. ER-1, Professional Flight Computer, Institute for Aeronautical Education. Two-tone blue. In original envelope. Compliments of USAIG, United States Aircraft Insurance Group.

CALCULATORS / SELECTORS (SLIDE RULE TYPE)

857. Air Duct Calculator --- 8 1/2 inch X 4 inch one-sided, cardboard sliding device with one slide and five windows. Copyright 1974 by Robert W. Wadington. On the back, common air duct diagrams and related formulas. Orange, black, and white. Very good condition.

858. Allied Coil Winding Calculator --- 10x4 inch, heavy cardboard, two-sided calculator. R-F Resonance and Coil Winding Calculator. Copyright 1960, Allied Radio Corp., Chicago, Illinois. In slip case. Very good condition.

859. Allied Controls Sealed Relays --- 4 inch X 9 inch heavy cardboard sliding device. Two windows on one side, three on the other. Dark blue with red and white trim. Allied Control Company, New York. Slide-Chart Corp., 1954. Perrygraf. Good condition, just a few, small nicks and scratches.

860. Broaching Computer --- 4 inch X 9 inch heavy cardboard sliding device. Six windows on one side, two on the other. Red, white, and black. Instructions on the rule. Apex Broach and Machine Company. Detroit and Warren, Michigan. Very good condition.

861. Broaching Force Calculator --- 3 inch X 6 1/2 inch sliding device. Plastic with cardboard slide. Colonial Force Calculator, Use to Determine Force Required in Broaching. Four windows on one side, two on the other. Instructions on the rule. Blue and yellow. Colonial Broach and Machine Company, Detroit. Good condition.

862. Broaching Guide --- 3 1/2 inch X 7 1/2 inch heavy cardboard sliding device. White with orange and black trim. Six windows on one side, three on the other. Sundstrand Machine Tool, Belvidere, Illinois. Slide-Chart Corp., 1959, Perrygraf. Very good condition.

863. Coronary Risk Calculator --- 10 inch X 3 inch, heavy white plastic device. Two-sided. Considers age, blood pressure, smoking, and cholesterol. By I.C.I. Pharma.

864. Defactor Calculator --- 3 1/2 inch X 10 inch device. Slide Rule for Computing Radioactivity Decay Factors. Six scales, two windows. White cardboard. Radioisotope data on the back. Good condition.

865. Derck's Gauge Dials --- A very old, very unusual, 5 inch circular device. Three cardboard wheels. The largest encases four small plastic dials around its circumference. Copyright 1913. Many windows on both sides. The variables seem to relate to machining. Indianapolis, Indiana. Some dirt and a few ceases, but still very useable and readable. A very interesting device.

866. Dist-O-Map --- Very interesting, new book of circular devices, by Rand McNally. Seven maps, each with a 7 inch wheel, used to determine the driving distances between various U.S. cities. Bound into a colorful 7 1/2 inch X 8 inch book made of heavy cardboard. 11,000 U.S. mileages between major cities with the turn of a dial. New.

867. Farmetrics --- 3 inch X 8 1/2 inch sliding device for conversions between English and metric systems. Variables include: Volume, Pressure, Energy, Yield, Application Rates, Temperature, Length, Area, and Weight. For farm use. Shades of rose, with red, black, and white trim. International Harvester logo. Light spotting and two small tears, otherwise in very good condition.

868. Fiberglas Calculator --- 6 1/2 inch circular calculator used to determine the cost saving for using fiberglass pipe wrap. Cardboard by Slide-Chart Corp., 1961, Perrygraf Corp. Wheels on both sides. Nice condition.

869. Flowrator Meter Selector --- Fischer & Porter Co., copyright 1956, 7 inch X 2 inch plastic sliding device. Slide both inverts and reverses. Instructions on the back of the rule. It appears as if the rule was made by the Emeloid Co.

870. Food and Labor Cost Calculator --- a 9 1/2 inch X 2 1/2 inch rectangular cardboard and plastic device. Copyright 1955 by General Foods Corp., Institutional Products Division. Four scales on each side. Includes pictures of 30 General Foods food packages. Very good condition.

871. Gear Calculator --- a double-circular device with two 2 1/2 inch wheels mounted side-by-side in a 2 1/2 inch X 4 1/2 inch frame. Six window on each side. White plastic. Presented by The Fellows Gear Shaper Co., Springfield, Vermont. Made by Bastian Bros. Co., Rochester, N.Y. Very good condition -- just a little dirt.

872. Goren Point Count Bidding Wheel --- a 5 1/2 inch circular device for bridge bidding. Green, white, and black cardboard. Instructions on the back. One crease and a little dirt. Otherwise in good condition.

873. Heppenstall Steel Weight Calculator --- a 12 inch X 2 3/4 inch rectangular device. Blue, white, silver, and orange, heavy cardboard. Several scales. Three widows on one side, one on the other. Instructions on the rule. Heppenstall Company, Pittsburgh. Copyright 1941, Graphic Calculator Co., Chicago, Illinois. Some dirt and a few small nicks and creases, but still solid and usable.

874. Honeywell Valve Slide Rule --- New, 3 1/2 inch X 9 1/4 inch rectangular cardboard device with 3 windows on each side, with values for gases, liquids, and steam. In original envelope with a separate instruction card, copyright 1976.

875. Indy 500 Trivia/Timer --- New, 6 inch circular device, in original envelope. Calculates speed from time, for the Indy 500 Speedway. Also has many Indy trivia questions and answers. Donald Davidson's 1987 Indy 500 Trivia/Timer. Red, black, and white cardboard. Distributed by Bryant Heating/Cooling. Made by American Slide-Chart Corp., Wheaton, Ill. (Others available.)

876. Landis Grinding Wheel Calculator --- a 3 1/2 inch circular device mounted in a 3 1/2 inch square frame. One widow on each side. Blue and yellow cardboard. Landis Tool Company, Waynesboro, Pennsylvania. Somewhat dirty, but solid.

877. Ling Dialor --- 6 1/2 inch circular device. Ling, Electronics Division Ling-Altec Electronics, Inc. Dialor for Calculation of Vibration Level for Random Noise of Uniform Spectral Density. Green, black, and white cardboard. Wheels and windows on both sides. Very good condition.

878. Long Distance Rate Wheel --- a 4 3/4 inch circular device mounted on a 5 1/2 inch square backing. For calculating long distance phone rates based on distance between calling points. Has a Bell symbol on it. Effective date: 9-13-77. Thin white cardboard with red and blue trim. Some dirt, one crease, and a nicked corner. Otherwise in good shape.

880. Magnetic Wire Calculator --- 3 inch X 7 1/2 inch rectangular cardboard sliding device. By Rea Magnet Wire Company, Enameled Magnet Wire Data. Window on each side. All sorts of data about magnetic wire.

881. Mark-Up Master --- 2 1/2 inch X 7 inch plastic sliding device with three windows. Readings for Unit, Dozen, Gross, 24 Unit Case, and 48 Unit Case. Presented by Canepa1s Red Cross Products, Chicago. Manufactured by Parisian Novelties Co., Chicago. Very good condition. Slight cracks on the back, hardly noticeable.

882. Metric Converter --- 3 1/2 inch X 8 inch heavy cardboard sliding device, Instant U.S. to Metric Conversions. From Waldenbooks. Nine conversion windows on one side, ten on the other. Variables include: Length, Area, Volume, Weight, Speed, Energy, and Pressure. White with blue and black trim. 1971, Slide Chart, Corporation. Very good condition.

883. Metric Converter --- A 3 1/2 inch X 8 inch plastic sliding device, marked Metric Converter, CrownZellerbach, Nonwoven Fabrics Division. Eight windows on one side: conversions for length, mass, area, and volume. On the back, C and D scales for multiplication, plus a number of conversion factors.

884. Milling Feed and Speed Calculator --- 3 1/2 inch X 8 inch heavy cardboard sliding device. Three windows on one side, one on the other. Wesson's Feed and Speed Calculator. Wesson Company, High Performance Carbides, Ferndale, Michigan. Good condition -- some dirt and a few nicks.

885. Nutri/System Goal Date Wheel --- 5 inch circular device. Rose and white cardboard. For determining the goal date (for weight loss?). Nutri/System, Willow Grove, PA. Copyright 1982, American Slide-Chart Corp. Very good condition.

887. Profit Calculator --- 5 inch circular device for calculating profit margin. White cardboard. Jenn-Air Corporation, Indianapolis, Indiana. Very good condition.

888. Proportional Scale, PS 69 --- 5 inch circular device, Proportional Scale, PS 69. Scales: Reproduction Size [Size of Original, Percentage of Original Size, Number of Times of Reduction]. Flexible white plastic. Made by C-Thru Ruler Company. Instructions on the rule. In original envelope.

889. Proportional Scale, PS 79 --- 6 inch circular device, Proportional Scale, PS 79. Scales: Reproduction Size [Size of Original, Percentage of Original Size, Number of Times of Reduction]. Flexible white plastic. Made by C-Thru Ruler Company. Instructions on the rule. Very good condition.

890. Proportional Scale --- 6 inch circular device, Proportional Scale, PS 79. Scales: Reproduction Size [Size of Original, Percentage of Original Size, Number of Times Reduction]. All plastic. Outer wheel white, inner wheel beige. Made by C-Thru Ruler Company. Instructions on the rule. Very good condition. (Another available.)

891. Pressure Tank Calculator --- 4 inch X 9 inch cardboard, rectangular sliding device. Red, yellow and black. Very good condition. Eight windows. By Automatic Control Company, St. Paul, Minnesota. Made by Perrygraf Corp.

892. Ribe-Federrechner --- New in box, 3 x 11 inch cardboard rule, with instruction manual. Two-sided with two slides and many scales. Complex manual. Everything is in German. Rule and manual are new, the rule still sealed in a plastic sleeve, The outer box shows some shelf wear.

893. Screw Selector --- 3 3/4 inch X 9 inch rectangular, cardboard sliding device. Four windows on one side, two on the other. Hole Size Selector on one side, Torque Data Selector on the other. Presented by Camcar Screw & Mfg., Taptite Div. Copyright 1971, American Slide-Chart Co. Like-new.

894. Screw, Woodruff Key, Pipe Thread, and Rivet Selector --- 4 1/2 inch X 9 1/2 inch plastic an cardboard sliding device. Thirty-seven widows on one side, twenty-eight on the other. Copyright 1967, Elemoto Sales Co. Some wear and dirt.

895. Shopper's Helper --- a 2 1/2 inch circular device mounted on a 3 inch by 5 inch rectangular backboard. Scales: Weight of Item [Cost of Item, Cost Per Ounce]. Blue and white cardboard. Presented by William J. Scott, Attorney General of Illinois, Consumer Protection Division. Very good condition.

897. Slide-A-Stain --- a 3 1/2 inch X 6 inch device with two windows. Instructions for laundry stain removal. Black and white cardboard. Very good condition.

898. Socket Screw Selector --- 6 1/2 inch X 9 inch cardboard sliding device. Twenty-five windows on one side, twenty-two on the other. Green. Holo-Krome Socket Screw Selector. Holo-Krome Company. Like-new. (Others available.)

899. Speed Calculator for Grinding Wheels --- a 2 1/2 inch circular device mounted on a 3 inch X 4 3/4 inch rectangular backing. Norton Abrasives. Charts on the back: Recommended Wheel Speeds in Surface Feet, and Maximum Peripheral Speeds. Flexible white plastic. Very good condition.

900. Stainless Steel Tubing Guide --- 3 inch X 8 1/2 inch cardboard siding device. Two windows on each side. Trent Weld Stainless Steel Tubing Specifications Guide. Colt Industries, Trent Tube Division. Copyright 1970, Perrygraf. Excellent condition.

901. Star Finder and Zodiac Dial --- A large (11 inch) circular, cardboard device for star and constellation location. Blue star wheel in white mounting. Stars and constellations on chart glow in the dark. Copyright 1970, Hubbard Scientific Company. Excellent condition -- still in original plastic sleeve. (Another available.)

902. Steel Roofing and Siding Calculator --- 3 1/2 inch X 6 1/2 inch cardboard rectangular sliding device. Conversion Scale Calculator for Twin-Drain Strongbarn Corrugated Galvanized Steel Roofing and Siding. Granite City Steel Company, Granite City, Illinois. By Slide-Chart Corp., 1961, Perrygraf Corp. Two windows on each side. Excellent condition. Turquois color.

904. Sylvania Doppler Shift Calculator --- 5 1/2 inch circular cardboard device. White and yellow. Two wheels. Encased in a 12 page instruction book/folder. Very good condition.

905. Tell-A-Coin Circular --- A 6 1/2 inch diameter circular rule with instructions. Used to determine the collector value of Lincoln cents (side 1) and Buffalo nickels (side 2) in 1958. Ten windows on each side. Black, white , and orange. Rule in very good condition. Instructions complete, with a few small tears.

906. Triangulator --- Plastic sliding device, with instructions and envelope. 2 1/2 inch X 5 inch. Double-sided. Buffalo, 15, N.Y. Makes Trigonometry Easy. Like new.

907. Truck Performance Calculator --- Truck Performance Calculator. GM Detroit Diesel Engine Division. Copyright 1956, Perrygraf Corp. 11 1/2 inch X 5 inch, two-sided, cardboard sliding device with one slide and seven windows. Bronze, black, and white. Very good condition.

908. The U.S. Standard Measures and Metric Converter --- 3 1/4 inch X 8 inch cardboard device. Conversion measure windows on both sides. Blue, lack, and white. Very good condition.

909. Velocity & Pressure Drop Calculator --- 4 1/4 inch X 11 inch very-heavy cardboard sliding device. Five plastic-covered windows on one side, three on the other. Light yellow and blue (very attractive). Tube Turns Division, Chemetron Corp. Copyright 1945 & 1965, Chemetron Corp. Separate instruction sheet, Xeroxed. Everything in excellent condition.

910. Vibration Computer --- 4 inch X 9 inch heavy cardboard sliding device. Four windows on one side, two on the other. Endevco Corporation, Dynamic Instrument Division. Dynamic Instrumentation - Shock, Vibration, Pressure. White with black and red trim. Eighteen scales. Very good condition.

911. Wave Filter Design Guide --- 4 inch X 10 inch very heavy cardboard sliding device. White, blue, and black. Two separate slides. Six windows on one side, two on the other. The two windows relate to two interesting graphs. Instructions on the rule. Genisco Technology Corporation. Copyright 1967. Perrygraf. Very good condition.

912. Westinghouse Life-Line T AC Motor Frame Selector --- 5 X 8 1/2 inches cardboard sliding device. Two sided. 13 windows on each side. Made by Slide-Chart Corp. 1965, Perrygraf Corp.

913. Westinghouse Electric Motors --- 3 1/2 inch X 7 inch plastic and cardboard, rectangular sliding device. Orange and blue. Very good condition. Squirrel Cage Life-Line Motors, Westinghouse Electric Corporation, Copyright 1957. Seventeen windows on each side. Made by Graphic Calculator Company, Chicago, Illinois.

914. Wiring Device Selector --- 4 3/4 inch X 11 inch cardboard sliding device. Five windows on one side, seven on the other. Yellow, green, and white (attractive design). Nema Wiring Device Selector. Presented by Hubbell Wiring Device Division. Copyright 1977, Perrygraf. Like-new.

915. Yield Scale (Stocks) --- 5 inch rule. Scales: Dividend or Coupon Rate [Market Price] Current Yield. Thin white plastic. No cursor intended. Instructions on back. Issued by Lane, Peper & Jaffray, Inc. Good condition -- a little dirt and a little bowing.

CALCULATORS -- MECHANICAL

916. Addiator Universal --- New in box, Addiator Universal adding machine. 6 x 1 1/2 inches, green and silver. 6 pull-down columns on top for addition and 6 on the bottom for subtraction. Clearing bar on top. Complete with stylus, plastic case, and outer box. The outer box is worn, but the rest is new.

917. Addiator (Duplex, Large) --- Unusual, large, two-sided Addiator. Addition and multiplication on one side, subtraction and division on the other. Large: 4 1/4 inches X 6 1/4 inches. Nine pull-down columns on each side. One side gold and black, the other silver and black. Large clearing bar. A little surface wear, but still very nice.

918. Addipresto Adding Machine --- New in box, gray, 5 1/2 X 5 1/2 X 3 1/2 inch, plastic and metal adding machine with 7 pull-down wheels. Complete with clearing lever and stylus. Made in Italy. In original cardboard box.

919. AddoMeter --- Almost new, AddoMeter in original, heavy-duty, snap-close case and instructions. By the Reliable Typewriter & Adding Machine Corporation, Chicago, Ill. Metal (brass?) unit. 2 1/2 inches X 11 1/2 inches. Flat. Eight dial-type wheels (0-9). Built-in stylus and clearing lever. Eleven inch rule on the top, beveled edge. Almost-new condition. The case is wood, covered in black fabric, with a green felt pad inside. It has snap closures and is marked: AddoMeter Adding Machine is in very good condition. Instructions included. A very nice set. (Others, with variations, available.)

920. American Adding Machine --- American Adding Machine by American Can Company, Adding Machine Division, Chicago, Illinois. A neat, pull-down-lever, hand-crank type adding machine. Black metal with filigree-type design all over. 7 inches X 9 1/2 inches X 8 inches. Seven pull-down levers. Two cranks. Seven circular answer windows above the levers. Very good condition. Heavy for its size.

921. Arithma Addiator --- Like-new, Arithma Addiator with stylus, case, and instructions. 1 1/2 inches X 6 1/4 inches. Thin. Metal. Silver and black. Six pull-down columns for addition and six for subtraction. Pull-up lever on top for clearing. Brown slip case. Instructions. Everything like new. (Others, with variations, available.)

922. Baby Calculator --- Baby Calculator with instructions. Chicago. 3 inches X 6 inches. Metal. Black and gold. Seven pull-down columns. Clearance lever at the top. Marked: Add, Subtract, Multiply, Divide. Some wear, but basically, OK. One page of instructions is missing. (Another available.)

923. Bohn Contex --- a 10-key, desk-top, mechanical calculator. 8x10x4 inches. Gray plastic case. Instructions on the bottom. Made in Denmark. Good condition.

924. Burroughs Calculator (Comptometer-Type) --- 9 inches X 11 inches X 4 inches. Black frame. Nine columns of 9 keys per column. Good condition.

925. Calculator Pen --- Labeled: Computer, Made in Italy. (Black, or yellow, or green) ballpoint pen that shows multiplication tables up to 10 X 10. Each push of the retraction button changes the multiplier, from 1 through 10. The answers show up in ten windows, labeled 1 through 10. Very interesting. (Others available.)

926. Chadwick --- Adder with 7 finger pull-down wheels. Blue-green plastic. With red clearing lever. 4 1/4 inches X 3 1/2 inches X 4 inches. Made in Japan. Nicely made.

927. Comptometer --- Comptometer by Felt & Tarrant Mfg. Co., Chicago. 9 1/2 inches by 14 1/2 inches. Copper-colored metal case. Ten rows of nine keys per row. In good condition. Two key covers missing. Last patent date, November 2, 1920.

928. Comptometer --- Unusual Comptometer by Felt & Tarrant Mfg. Co., Chicago. 8 inches by 15 inches. Copper-colored metal case. Eight rows of nine keys per row. In good condition. Patent numbers, no dates. Unusual lever near the right-side crank, loops around to pull down lower left key 1.

929. Comptometer --- Comptometer by Felt & Tarrant Mfg. Co., Chicago. 9 inches by 14 1/2 inches. Green metal case with rounded corners. Eight rows of nine keys per row. Good condition. Patent numbers, no dates.

930. Comptometer --- Comptometer by Felt & Tarrant Mfg. Co., Chicago. 9 1/2 inches by 14 1/2 inches. Copper-colored metal case. Ten rows of nine keys per row. In good condition. Last patent date, November 2, 1920.

931. Comptometer Card --- 4 inch X 9 inch card, Decimal Equivalents of Common Fractions to be Used in Connection with the Comptometer. By Felt & Tarrant Mfg. Co. Some pencil marks and a middle fold, otherwise in good condition.

932. Curta Type II --- Serial # 555268. Very good condition - just a few signs of surface wear. In plastic case. Also a leather outer case.

933. Desk Add-A-Matic --- Almost new, Desk Add-A-Matic adding machine, in box. By CMI, Inc., Chadwick, Japan. 5 inches X 5 inches X 3 1/2 inches. Black and gray metal with 7 red, pull-down dials. Clearing button. Stylus built-in. Original red and black box show some wear and tear, but the calculator is almost new.

934. Dial-A-Matic Adding Machine --- Dial-A-Matic Adding Machine, with box and stylus. By Sterling. 2 1/2 inches X 8 inches. Four dial-type wheels. Ivory plastic. The unit is in excellent condition. The box is complete, but coming apart a little. (Another available.)

935. Dial-A-Matic Adding Machine --- Dial-A-Matic Adding Machine, with box. By Sterling. 3 1/2 inches X 11 1/2 inches X 1/2 inch. Six dial-type wheels. Ivory with green trim plastic. Clearing lever. The unit is in very good condition, just one small, faint mark on it. The box is missing one end and is slightly crushed, but is generally in good condition.

936. Dial-A-Matic Adding Machine/Pencil Box --- Dial-A-Matic Adding Machine - Pencil Box, with stylus and instructions. By Sterling. 2 1/2 inches X 8 inches X 3/4 inch. Four dial-type wheels. Yellow with clear back. plastic. The unit, except for a crack on the back, is in very good condition, as are the stylus and instructions.

937. Kess-Add --- Almost new, four-dial, pocket adder with case, stylus, instructions, and box. 5 inches X 1 1/2 inches X 1/2 inch. White plastic with a similar stylus. Box and instructions. Everything almost new. (Another available.)

938. Kingston Pocket Calculator/Slide Rule --- New, 6 column, addition and subtraction sections, Addiator-type calculator with stylus, instructions, and case. Slide rule on the back. Scales: A [B, CI, C] D. Silver metal. Blue plastic case. (Others available.)

939. Lightning Calculator --- Excellent, The Lightning Calculator, with wooden stand, and box. The Lightning Calculator Co., Grand Rapids, Michigan. Black metal unit. 2 1/2 inches X 12 inches. Flat. Seven dial-type wheels (0-9). Brown wooden, slanted stand. The unit has some light scratches on it, but is in excellent condition, as is the wooden stand. The black triangular-shaped box shows considerable wear.

940. Lightning Portable Adding Machine --- The Lightning Portable Adding Machine, with bakelite stand, stylus, box, instructions, and order form. The Lightning Adding Machine Co., Los Angeles Calif. Green metal unit. 2 1/2 inches X 12 inches. Flat. Seven dial-type wheels (0-9). Brown bakelite, slanted stand. Silver-colored stylus to turn dials. The unit, base, stylus, and instructions are in excellent condition. The original gray box is complete, but somewhat worn and slightly broken. (Others, similar, available.)

941. Little Giant Adding Machine --- 5 pull-down wheels. Wooden outer body. Metal works. Made by Kel-San Mfg. Co., Dayton, Ohio. 5 inches X 6 inches X 5 1/2 inches. Fair condition, but works.

942. Magic Multiplying Pencil --- 5 1/2 inch long mechanical pencil/calculator. Main body is red-painted wood. Clear cylindrical tube turns to multiply up to 12 X 12. Apex Products Corp., N.Y.C. Has a 40's look. (Others available, also one 6 1/2 inches long.)

943. Plus Calculator --- From Plus Computing Machines Inc., New York, N.Y., Designed by Bell Punch Company Limited, London, England. Model No. 506/C/44.405/Q. Six columns, five rows of buttons. Numbers from 1-5. Clearing lever. Seven-place answer window. 7 x 7 x 4 1/2 inches, plus a slanting stand. Green metal case. A sort of mini Comptometer. Good condition.

944. Precise Calculator --- Precise Developments Co., Inc., Chicago. Heavy metal, gray body. 7 pull-down columns. 7-window answer section, behind a magnifying lens. Built-in stylus. Large metal clearing lever. 4 1/2 inches X 7 inches X 5 inches. Very good condition. A very solid instrument.

945. Produx Original --- Produx Original calculator. 2 1/4 inches X 6 inches. Seven pull-down columns on the top for subtraction and seven on the bottom for addition. Made in Germany - West. Metal. Green and gold. Clearing bar on top. Green and clear plastic slip case with metal stylus. Everything in very good condition. (Another available.)

946. Resulta 7 --- Resulta 7, marked Export. Made in West Germany. 7 pull-down columns. Stylus included. All metal. 3 1/2 inches X 6 inches X 4 1/2 inches.

947. Ropp's Commercial Calculator --- Copyright 1887. Ropp's Commercial Calculator. 4 inch X 6 1/2 inch, red folder cover with black printing. 128 pages plus blank notebook pages and a small accordion folder in the back. Good condition. (1909 and 1919 editions also available.)

948. Slinky Calorie Counter --- a 6 inch long, plastic, figure-eight-shaped device for cumulating calories. A phone-like dial is turned to add calorie counts (or any other counts) which show on an adjacent dial, going up to 2000.

949. Speedee Add-A-Matic --- Chadwick, Speedee Add-A-Matic. 11 inches X 9 inches X 4 inches. Manual calculator. 8 rows of keys, keys numbered 1-5. 9 answer windows. Dollars and cents. Gray plastic body with ivory and maroon keys and maroon clearing button. Made in Japan -- a very Japanese approach to calculation. Excellent condition. Fully functional.

950. Sterling Multiplier Pencil Box --- 8 inch yellow and white plastic pencil box with sliding multiplier and inch and cm scales. Includes a pencil sharpener.

951. Summit --- Summit calculator. 5 inches X 7 inches X 5 inches. Green metal body. 8 finger-pull-down wheels. Crank for clearing. Made by the Pearl Engraving Corp., New York 3, New York. Very good condition -- just a touch of surface rust on the screws and a little surface wear. A very solid unit.

952. Swift Handy Calculator --- Swift Handy Calculator, with box, cover, instructions, and stylus. 5 1/2 inches X 5 inches X 3 1/2 inches. Aqua-colored plastic body with seven pull-down lever-dials. Plastic stylus and clear plastic cover. Instructions. Made in Hong Kong. Outside box has a small tear and some slight dirt and wear. Instructions and calculator are in very good condition, just a slight amount of usage wear.

953. Sylvania Photo Calculator Mechanical Pencil --- Black, white, and gold mechanical pencil with two rotating barrels for five photo settings: Flash Lamp, Shutter, Film Type, Aperture, and Feet.

954. Tasco Pocket Arithmometer --- Essentially new, Tasco Pocket Arithmometer, complete with stylus, case, and instructions. Calculator like-new, 3 inches X 5 1/4 inches. Bright chrome-finish metal. Eight pull-down columns. Clearing lever at the top. Cover slides up and down for addition and subtraction. Heavy duty. Instructions, case, and stylus in very good condition. (Others available.)

955. Tip Calculators (2) --- A pair of 7-pull-down-column calculators. Pocket sized. Each with stylus and instructions. Gold colored, in fold-over wallet. Packed in the original shipping box from H. Martin, Chicago. Very early stamps. Unusual.

956. Universal Circle Metric Converter --- cylindrical pencil holder with two rings that turn for metric conversions. 4 inches high, 2 3/4 inches in diameter. Black plastic with white lettering. Very good condition.

957. Universal Circle Metric Converter --- cylindrical pencil holder with two rings that turn for metric conversions. 4 inches high, 2 3/4 inches in diameter. Red plastic with white lettering. Very good condition.

958. Universal Multiplier Pen --- New, 7 inch long ballpoint pen, with a rotating barrel that multiplies up to 12 X 20. Black and green (or red, or blue, or light green, or yellow). Made in Italy.

959. Ve-Po-Ad --- Ve-Po-Ad calculator with case and instructions. Eight pull-down columns. Clearance lever at the top. Black and gold metal. In black folding case. Instructions. Rust on the calculator and some wear on the case. Overall, just fair. (Another available.)

960. Victor Comptometer Corporation Book --- New, hardcover book: It All Adds Up, The Growth of Victor Comptometer Corporation. 243 pages. Hardbound. Copyright 1968. Historical. Includes discussions and pictures of the Victor Model 110, "the first truly portable (35 pounds) adding machine;" several Victor mechanical machines in ads; The Comptometer; etc. Among other topics covered are the mergers with the McCaskey Register Company and the Comptometer Corporation -- all were Chicago firms. A good historical reference.

961. Wizard Calculating Machine --- 3 inches X 5 1/2 inches. Eight pull-down columns. Silver metal front. Black plastic back. Clearing bar on the top. No stylus and one part of the stylus clip is broken; otherwise, OK condition.

962. Wolverine Adding Machine --- 6 inches X 9 inches X 4 1/2 inches desk-top (toy?) adding machine. Sloped top. Four pull-down-with-the-fingers columns. Blue and red. Considerable scratching and some rust.

DRAFTING AND RELATED EQUIPMENT

In addition to the items below, many other drafting rules, triangles, French curves, templates, T squares, pens, and drafting sets are available. Please ask if you are looking for something special.

963. Acu-Arc Ruler --- a 14 inch, adjustable, heavy-plastic instrument designed to draw arcs of circles of any radius from 7 inches to 200 inches. Made by Hoyle Engineering Company. Complete with box, instructions, guarantee, and conversion chart. Very good condition.

964. Alteneder & Sons Spacing Dividers --- A stainless steel device used to divide a line into 10 equal segments. Looks like a multiple-bladed scissors. In original box.

965. Alvin Map Measure --- New in case map measure. (Others available.)

966. Alvin Proportional Divider --- New in case, 8 inch proportional divider. Alvin No. 255. In black case lined with blue velvet. A beautiful instrument.

967. Alvin Triangular Rule 240P --- 12 inch rule in clear plastic case. Rule is white plastic.

968. Beam Compass --- 12 inch beam compass. Round bar with fine, micro adjustment. Very good condition. A very nice instrument.

969. Beam Compass --- A beautiful beam compass in a tray. Marked: Compass, West Germany. Extends to 30 inches.

970. Beam Compass --- An aluminum beam compass set made by Ridgeway. In black case. Nicely made.

971. Bofa (Chinese) Large Drafting Set, 8423 --- Essentially-new, 23-piece, highly-polished set in pin-lock case. With original pen wipe. Case marked Shanghai, China. Very nice.

972. Boxwood Drafting Rule --- 6 inch boxwood rule from pocket drafting set. Good condition with some ink stains.

973. Brass Drafting Set --- 7-piece, brass drafting set in small, 5 1/2 inch X 3 1/2 inch, wooden box. Complete. Protractor in lid compartment.

974. Brass and Ivory Drafting Set --- 11-piece drafting set (missing 6 pieces) brass, plus brass protractor. Pen with ivory handle. Walnut case marked: Vigliani, Torino, 23 Via Lagrange -- also engraved, Marrria G.

975. Charvoz Drafting Set --- 12-piece chrome-finished set in case. Very good condition. Case marked: Drafting Instrument Set, 6675-00-926-4360, U.S. Government Property, Set 1 - field, Charvoz, West Germany.

976. Collins Engineering Drafting Set --- 9-piece drafting set, complete. Very nice. Appears to be a 19th century design. Nickel-silver? Even includes the wrench. Black case with pin latch. Interior of case marked, The Collins Engineering Company, Scranton, Pa.

977. Coster (Dutch) Drafting Set --- A beautiful, older, 14-piece drafting set by A.J. Coster, Instrumentmaker, Rotterdam. High quality set , which includes a drop-bow compass. Case is Ok, but worn.

978. Darling, Brown, and Sharpe, Draughtsman's Protractor --- A beautiful instrument in a 10 x 7 inch, thin, leather covered case with purple velvet lining. This is a large protractor patented in 1887. Complete with original instructions. "The protractor is made from 1/16 inch sheet steel and is light and durable. The length of the blade is 8 1/2 inches. The graduations read to degrees and the vernier reads to two minutes."

979. Dietzgen Simplicity Beam Compass Set (Wooden) --- An interesting beam compass set with wooden beams set in a wooden holder. Unusual metal hardware.

980. Dietzgen Beam Compass Set 969 --- Essentially new, beam compass set. Complete. Aluminum pieces. Black-covered, velvet lined, dual-pin-lock case. Original outer box is somewhat worn, but everything else is in excellent condition.

981. Dietzgen Beam and Bow Compass Set 968 AB --- An interesting drafting set in a 14 x 3 inch case. Consists of a decorative beam compass, a large bow compass, and a wood-handled pen. The set is in very good condition. The case shows some wear.

982. Dietzgen Commander --- 11 piece set, 4 of which are missing. Very good black snap case.

983. Dietzgen Dependo Drafting Set --- 9 piece set with tubular legs on the large dividers. Needs a little clean up.

984. Dietzgen Drafting Set, 1170 --- Beautiful 10-piece drafting set, # 1170. Excellent condition. Missing only the small-parts capsule. Black, leather-covered case with slide catches and blue velvet lining. Brass protractor and several additional rules, etc. under the top flap. Very nice older set.

985. Dietzgen French Curve --- Dietzgen 12152-6 French curve.

986. Dietzgen Master-Pro --- 9 piece drafting set. With both large and small bow compasses. In black, green-felt-lined case. Everything in excellent condition. A very nice, precision set.

987. Dietzgen Modern Drafting Set 1235/3KS --- Almost new, 5 piece set with large and small bow compasses, in black snap case.

988. Dietzgen National --- 10 piece drafting set, very nice condition. Case needs small repair.

989. Dietzgen Pantograph 1880 --- New in box, polished hardwood pantograph. 21 inches long. Very nice.

990. Dietzgen Proportional Divider --- An almost new proportional divider. Both the case and instrument are marked U.S.C.E.

991. Don Barrow Romer --- You tell me what it is.

992. Drafting Case and Board --- 11x14 inch , elk skin, zippered case, containing a drafting board and a leather-sheathed T square. A very nice, portable drafting studio.

993. Drafting Set --- 6 piece (two not from the original set) plus ruler and protractor. Pin-lock case.

994. Drafting Set --- 6 piece, one with ivory handle. Chromed. In case with pull-pin lock. Made in Japan.

995. Drafting Set (Ivory) --- 8 pieces of a 14 piece English (?) drafting set. Intricate with interleaf joints. Two pens with ivory (?) handles. Black case.

996. Drafting Set (Ivory) --- A very old, 7-piece set (one piece missing) with an ivory-handled pen. Pin-lock case.

997. Drafting Set (Ivory) --- A very nice, unusual, old 8-piece drafting set. Ivory pen handle and small parts holder. Beautiful tools. Case marked: Drawing, Surveying Instruments, Yasukawa & Co., Yokohama.

998. Drafting Set, Brass --- A beautiful 6-piece brass drafting set in an interesting leather-covered case with hook latches. Made for Etuis De Mathematique, France.

999. Drafting Set, Brass --- Beautiful, very old, 6-piece brass drafting set. Pin lock black case. Marked: Johann Gronemann, Vienna.

1000. Drafting Set (Very Old) --- A very old, two-piece, brass drafting set in a cloth-covered, wooden two-piece slide case. The compasses and dividers are each 6 inches long. The dividers have a unique, inter-leafed hinge. The pieces are certainly no later than 19th century, perhaps 18th.

1001. Drafting Set (Old) --- A seven piece drafting set in a black, purple-lined case. Silver-colored plating over brass. Interesting, unusual compass design.

Drafting Triangles --- Several sizes and manufacturers.

1002. Ecco Drafting Set, 9325 1/2 --- Nice, precision 10-piece set made by Ecco in Germany. Appears to be the same company that made sets for K+E. In good black case.

1003. Engineering Drawing --- Book by French and Pierce. 8th edition. Tan hardcover. 715 pages. Good condition. 1953, McGraw-Hill.

1004. European Drafting Set --- A small, nickel-plated, brass set typical of the later part of the 1800's. Eight pieces. Some plating wear. Case worn. Still, a pretty set.

1005. Faber Pencils --- New in box, 3 dozen blue-lead wooden pencils. Pencils dark blue with gold end and printing. Marked, A.W. Faber, Berkeley, U.S.A., 827 Blue. Box Marked. A.W. Faber, Berkeley, Thin Colored Lead, Hexagon 827, 3 Dozen, Blue, Made in U.S.A.

1006. Faber-Castell Triangular Rule 873C/Z1 --- A 12 inch triangular rule. White plastic, in partial box.

1007. French's 7th Edition Quiz Questions -- Booklet by John M. Russ. 1948, McGraw-Hill. 53 pages. Very good.

1008. German Drafting Set - Very Large --- 27 piece German drafting set in case. Includes a proportional divider, trammel points, a dotted line pen, a railroad pen, a pair of dividers with an ivory handle, and four pens with ebony handles. Case is 12 x 9 inches. The tools are in very good condition. The black, leather-covered case with a pin lock is somewhat worn. An interesting set.

1009. German Drafting Set 9524 1/2 --- Beautiful 8-piece set in black, pin-lock case. Fine instruments. Pen has an ivory handle. Case somewhat worn, but solid.

1010. Harling Drafting Set --- Very nice 6 piece English drafting set, marked Harling, London. Small compass has a nice tubular frame. The large compass has an unusual pivot mechanism. The very nice maroon leather covered case (slightly worn) is marked, in gold: W.H. Harling, Mathematical Instrument Manufacturer, 117, Moorgate, London, E.C. 2. Manufactured in England. A nice set.

1011. Ivory Rule --- 6 inch ivory rule, Very good condition.

1012. Ivory Protractor Rule: 4 1/2 inch X 1 1/2 inch ivory rule with protractor and various scales inscribed on it. Very good condition, just a little dirt/ink staining -- cleanable?

1013. Ivory Sector --- A beautiful, 6-inch (closed) ivory sector. Looks like it is new.

1014. Ivory-Handled Drafting Set, Large --- Beautiful, older,16-piece set. Includes 4 ivory-handled pens, proportional dividers, 7 compasses. The tops of the ivory pen handles screw off to reveal a sharp metal point. Case is 6 X 8 1/2 inches. Label reads: A. Nakamura & Co., Ltd., Tori-3 Chrome, Nihonbashi, Tokyo, Japan. A very nice set.

1015. Ivory-Handled Drafting Set --- Complete, beautiful 12-piece drafting set in case. Ivory handles on the two pens, plus an ivory small parts holder. A beautiful, delicate, 19th century set.

1016. Ivory-Handled Drafting Set --- A beautiful, older 8-piece set, German silver with an ivory-handled pen. A beautifully made set. Red leather covered case with blue silk and velvet lining.

1017. K+E Apollo Drafting Set --- New in-case, 11-piece, heavily chromed set. Made by Haff.. Includes large and small bow compasses and bar extension. Green snap case. Original pen cloth and anti-rust paper. (Another available.)

1018. K+E Beam Compass Pencil Parts --- New in box, the two slide pieces for a beam compass using a pencil point. K+E # 9154-2. (Others available.)

1019. K+E Drafting Rule --- 6 inch rule, in case. K+E 1399W. White plastic. Green trim. The Maurer Company. Rochester, N.Y. Green leather K+E case. Good condition.

1020. K+E Drafting Rule --- 6 inch rule, in case. K+E 1420. Boxwood. Tan leather case. Good condition.

1021. K&E Drawing Instruments Catalogs--- Two K&E drawing/drafting instrument catalogs from 1925. Bound into one softcover volume. Titles: K&E Drawing Instruments (Paragon, Anchor, Minusa, Arrow, and Key), 102 pages; and Drawing Instruments and Materials for High Schools, Preparatory Schools, and Manual Training Schools, 53 pages. Plus price lists for both. A quarter-size hole in the cover, plus a little nick, otherwise, in very good condition. A great reference.

1022. K+E Excelsior Drafting Set --- 10-piece set in case. The fine, precision tools are in very good condition. The case is well-worn.

1023. K+E Favorite Wyteface 50 Ft. Rule --- Green metal case and white metal blade. Good condition.

1024. K+E Handy Paper Cutter N 2701 --- Small metal paper cutter in original K+E box, 1 1/2 x 2 inches. Excellent condition.

1025. K+E Excelsior Drafting Set --- 10-piece set in case. The fine, precision tools are in very good condition. The case is well-worn.

1026. K+E Jupiter Custom Series Drafting Set in Original Box , 99 5544 --- Like-new, 6-piece set in brown tweed case and original K+E green box. Includes a very large bow compass and extension bar.

1027. K+E Jupiter Drafting Set --- 13-piece set in black case. Everything in very good condition.

1028. K+E Jupiter Pen --- New in box, 5 1/2 inch K+E Jupiter Ruling Pen. K+E item number 55 25226. In green slide box. Everything is new. (Another available.)

1029. K+E Large Modern Drafting Set --- Almost new, 11-piece set with large and small bow compasses, a bar extension, a divider, etc. A beautiful, matte-finished set. Likely made by Haff. 11 x 5 inch hard case. (Others available.)

1030. K+E Minusa S-795-8 --- A 9-piece set in very good condition. Standard Minusa tubular construction. These are beautiful instruments.

1031. K+E Minusa Special Drafting Set 796 --- Almost new. Complete with two large and three small compasses, accessories, and two pens. Case.

1032. K+E Minusa Series S Drafting Set --- Virtually new, 9-piece set. Minusa tubular design. Black snap case with blue velvet lining. Set number S795 1/2. This would be a wonderful set for both display and use. The set appears never to have been used.

1033. K+E Minusa Large Compass Set --- Set number 768-2. A beautiful, tubular large compass with a pen point, separate ink pen, extra pen handle, and parts container. Black leather-covered case with blue velvet lining. Beautiful set. (Another available.)

1034. K+E Minusa Special Drafting Set --- Complete with two large and three small compasses, accessories, and two pens. Case. Useable, but used condition.

1035. K+E Protractor-Triangle, Adjustable --- Green see-through plastic. K+E 570213 8 inch, Luxlite, Denmark. Like new.

1036. K+E T-Square (Very Large) --- K+E T-square, #2087-42. 45 inches long.

1037. K+E Tape Measure, 100 Foot --- Brown, leather-covered case, marked K+E The Home Tape. A handsome steel tape measure.

1038. Mechanical Pencil with Measuring Scale --- Square-bodied, silver-colored, mechanical pencil with inch markings on one side. Engraved: Chas. Haas, Blue Island, Ill. Also -- Refeco, Bavaria.

1039. Micronta Proportional Divider --- Nice proportional divider in black case.

1040. Nautical Parallel Rules, Brass --- 18 inch nautical, brass parallel rules. Marked T.S. & J.D. Negus. Excellent condition.

1041. Nori Drafting Set --- 12-piece set in case, in very good condition. Unusual spring bow compasses. Wooden-handled pens and parts tube. Black snap case.

1042. Pantograph --- A very nice wood pantograph with all the hardware, in the original box with instructions. The box and instructions are worn, but the instrument is nice.

1043. Parallel Rules, Mayline --- Almost new in box, 15 inch, black plastic parallel rules, No. 5501, Mayline Company Inc., Sheboygan, Wis.

1044. Parallel Rules --- 6 inch ebony and brass parallel rules from a pocket drafting set. Very good condition.

1045. Parallel Rules --- 15 inch black wood.

1046. Pickett Model 238 Architect's Metal Adjustable Rule --- Brushed aluminum 12 inch rule. Pickett Model 238. Arch: 1/16, 1/8, 1/4, 1/2, 1:1, 2:1. Almost new.

1047. Post 915 --- New in box, very interesting set of drafting instruments -- large bow compass and beam compass, with all the attachments. A beautiful, new set in black snap case and red outer box.

1048. Post Pantograph 1496 --- Beautiful, like-new Post pantograph, Wood. Marked Posts 1496. In original box, which is worn. The instrument is like-new.

1049. Posts Rule 1222 --- 6 inch boxwood rule. Small nick on one edge. Slight surface wear. Otherwise, OK.

1050. Preevess (?) and Son Compass Set --- Three beautiful, small, spring compasses in a 4 1/2 inch square, maroon leather-covered case with spring latch. Beautiful set.

1051. Protractor-Rule --- Like-new, two-sided, boxwood protractor-rule. 6 inches X 1 1/2 inches.

1052. Put-Lines Mini-Drafting Machine --- A 9 1/2 inch, rolling drafting rule. Made of Lexan, with metal rollers. Very nice. In original plastic snap case.

1053. Riefler Drafting Set --- Older, 7 piece set. Small - compass is 4 1/4 inches long. Tubular design. Very nicely made. DR Patent No. 2997 abgel. Pin lock case is worn, but the instruments are in good condition.

1054. Riefler Drafting Set --- 17-piece set. Interesting, unusual tubular design. DR Pat. No. 2997? Two pens with ivory handles. Third pen with broken handle. Otherwise, complete. A really interesting-looking set.

1055. Reifler --- Professional 12-piece set with large and small, bow compasses and beam extension. Like new, in green, metal case.

1056. Reifer A 30 --- 10-piece drafting set, three pieces of which are missing. Tubular compasses. Tools need cleaning. Black case with pin lock is in good condition.

1057. Reifler G1 --- a 9 piece set with a large bow compass in a beautiful red leather covered case. High quality.

1058. Richter 1100 Drafting Set --- 19 of 20 pieces of a nice set -- missing one pen. A nice set, but will require some clean-up. The case has some flaws, but is all there.

1059. Schoenner Drafting Set --- 14-piece set. A very nice, older set, in black leather case with a pin lock. Case is somewhat worn, The tools are in very good condition.

1060. Schoenner Drafting Set 1631 --- Small, 6-piece set, divider point missing. Black snap case.

1061. Scripto Mechanical Pencils --- Nine pencils, marked State of California, plus three other pencils in an old case.

1062. Sharkskin-Covered, Wooden, Pocket, Cased Drafting Set --- Black covered case in fair condition. Brass dividers and one alternate leg inside.

1063. Ships Curves --- Two large (17 inch) French curves.

1064. Slidecomp Drawing Compass -- A unique drawing compass that works like a small beam compass rather than the standard divider-type compass. Has a sliding scale to set the circle size, up to a 3 inch radius. Beige plastic. Neat item. (Another available.)

1065. Sutton Brass Drafting Set in Wooden Box --- 8-piece brass set in a rosewood box with removable tray. Labeled: Chas. T. Sutton, Practical Optician, Manufacturer of Optical Philosophical and Chemical Apparatus, 108, Holloway Rd., Islington, N. Good condition.

1066. TEC (German) Drafting Set, Unusual ---- 18-piece set in case. High-precision, older style. Set includes: large compass, large divider, 2 smaller compasses, 3 bow compass/dividers, 3 different sized pens, a pair of trammel points, plus accessories. This is a very unusual set. Most compasses have micro-fine point adjusters. Very good condition.

1067. Torch Brand Drafting Set --- Eight pieces of a 14-piece set. Three large and three small compasses from a beautifully intricately-designed set. Several of the compasses have a wonderful fine adjustment mechanism for the leg pin. These are very nice tools.

1068. Tower Drafting Set, 607.50451 --- 11 piece set, divider point missing. Otherwise a nice modern set. In black snap case.

1069. Trammel Points --- A nice, complete set in slightly worn case. Well-made.

1070. Triangular Rule --- 12 inch hardwood triangular rule. E.B.B. & S., N.Y. Good condition.

1072. Use and Care of Drawing Instruments --- Use and Care of Drawing Instruments, Eugene Dietzgen Co. Copyright 1949. 5 1/2 inch X 9 inch softcover booklet, 32 pages with illustrations, including parts kits.

1073. Weber Drafting Set --- Very nice 8-piece set of tubular design. F. Weber Co., Philadelphia, Pa. Black case with green velvet lining.

1074. Weber Cosmos Drafting Set --- An almost-new, 10-piece drafting set of tubular design. F. Weber Co., Philadelphia, Pa. Black case with green velvet lining. Set number 3876. Missing only the adjustment screw on the small pencil compass.

1075. Wichmann Drafting Set --- Over twenty pieces, vintage, silver-colored metal. Includes six compasses, all with tubular arms. Excellent condition. Beautiful and unusual design. High quality. In a 5 inch X 11 inch black case with a pull-pin latch and black velvet inside. Case in good condition.

1076. Wooden-Boxed European Drafting Set --- An 8 x 6 inch European set with elaborate, precision tools. The wooden box with tray shows wear, The 8 original tools in the tray are in good condition.

OTHER INSTRUMENTS

1077. Geneva Lens Measure --- A 2 inch diameter, metal, circular device used to measure lens curvature. Patent dates ranging from 1891 to 1902. F.A. Hardy & Co., Chicago. A beautiful, heavy device. Looks like a pocket watch. Needs internal cleaning to work properly.

1078. K+E Slope Level --- Catalog # 5805. Clinometer of Slope Level. 4 inch square frame with slivered arc graduated to degrees, vernier reading to 5 minutes, fine adjustable spirit level graduated on the glass. In black leather-covered, velvet lined case, somewhat worn. Instrument in good condition.

1079. Map Measure, K+E --- Pocket-watch style map measure. 1 3/4 inch diameter. Chrome. Excellent condition. In original box. Box reads: Map Measure 62 0320, 100 Ft.In; Ft., In., 8ths.

1080. Micrometer, Boxwood and Brass --- Very nice, old, 4 1/2 X 1 inch micrometer by Becker Hatton Wall, London. Boxwood and brass.

1081. Polemoscope --- A 2 inch long optical device for seeing secretly at a 90 degree angle. A reproduction of an 18th century device used in opera houses. Made of wood with brass ends, by Van Cort Instruments, Northhampton, Mass. New in box.

1082. Scherr Scale/Pressure Gauge --- A small, pocket-sized dial device registering weight/pressure up to 30 grams. Geo. Scherr Co. Inc., New York 12, N.Y., Arpo, Made in France. In hard case with latch.

1083. Sikes Hydrometer, Buss --- 8 x 4 inch wooden box. Brass floats and 10 brass weights. Thermometer missing. Ivory insert on the box is marked, Sike's Hydrometer, Buss, 48 Hatton Garden, London. Excellent condition.

1084. Sikes Hydrometer, Palliser --- In 8 x 4 inch, wooden box, with brass float, 10 brass weights, and ivory backed thermometer. Both the thermometer and the ivory inset on the box are marked, F. Palliser, Camp Works, Wolverhampton. Everything is excellent condition.

1085. Sikes' Tables of the Concentrated Strength of Spirits with Directions for the Use of the Hydrometer --- 95-page hardcover book. "Established throughout the United Kingdom for Estimating the Duties on Spirituous Liquors, By Act of Parliament, 58 Geo. III, cap.28." Also has instructions for the use of a proof slide rule. Revised edition. No date.

1086. Stanley Level No. 3 --- 28 inch long Stanley wooden level with brass hardware. New Britain, Conn. Some wear, but nice.