5.4 Concise, Japan

Concise slide rules are manufactured by K.K. Konsaisu of Tokyo, Japan. They are the only manufacturer still producing and marketing new slide rules that have the classic scales. The Concise rules in particular are circular slide rules with various models both for generic numerical calculations, and for specialized calculations performed in various industries and professions. Promotional slide rules with company names are very common. Concise is the only major manufacturer that has continued to produce and sell popular versions of their circular slide rules to this day.

Concise 380 Radio Computer

Total number of Concise slide rules in the collection: 4. \(~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\)

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