1. On this rule the maker's name is given as Jakar. However it is identical, except for the background colour of the slide, to a Hope 51 G I also own.

2. Ron Knapp, in the egroups slide rule forum, quotes from the manual of a Hope slide rule which give their details as:

Hope Slide Rule Mfg. Co., Ltd.
Shigets Building, No. 26-18, Asakusabashi,
2-chome, Taito-ku, Tokyo, 111 Japan
Tel: (03) (862) 7644, 7645
Cable Address: HOPESLIDE TOKYO

It would appear that this particular rule was made by Hope and sold by Jakar.