1. Whiulst other rules have identical layout to this one, my Jakar 1005 for example, it appears that this rule was manufactured by Hope.

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