Vintage Japan Concise Circular Slide Rule No. 28 With Case

Vintage Circular Concise No. 28N Slide Rule In Org Case Japan W Advertising

Pair Vintage Concise Circular Sliderule 28N - Made in Japan w/ Case- Vulcan

Magnificent Vintage Circular Concise No. 28N Slide Rule | Yellow Case | Japan

Concise ruler 28N English Version Circular slide rule made in Japan *US seller

VTG CONCISE CIRCULAR SLIDE RULE W/CASE & INSTRUCTIONS JAPAN NOS

VINTAGE CONCISE NO.28 CIRCULAR SLIDE RULE JAPAN, BRANDED REACH RELAIS, W MANUAL

Concise Circular slide rule 28N (English Ver.) Made in Japan w Cover PB85