|
|
'Concise' Circular Pocket Slide Rule No. 28 by Takeda. This is a small circular slide rule made in Japan by Takeda Drawing Instruments Company. The rule is 8 cm in diameter, made of plastic with deep-cut graduations to ensure life time accurate calculation. The rule comes with a case and 17 pages instruction manual. It is marked with an advertising ElAl logo. |
|