May 9, 2025
Concise 28N Circular Slide Rule-With ISRG Logo-Brand New!
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Back in 2002 the International Slide Rule Group had Concise in Japan produce a new run of their #28N circular rules.This rule is brand new, still in the original plastic bag. It has 5 scales on the front and conversion factors on the back. It has a full-color ISRG logo on the front. In a yellow vinyl case. Instructions on a folded sheet.Here is an unusual find!
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