Concise Ruler Circular Slide Rule No. 300 100829 Diameter (approx.) 110mm F/S

Concise Ruler Circular Slide Rule No. 300 100829 Made IN JAPAN 110mm

Concise 100829 Ruler Circular Slide Rule 300 Diameter 110mm 4.3inch new F/S

Concise Ruler Circular Slide Rule No. 300 100829 Made in Japan 110mm New

Concise Ruler Circular Slide Rule No.300 100829 110mm

Concise Ruler Circular Slide Rule No. 270N 100812 F/S w/Tracking# New from Japan

Concise Ruler Circular Slide Rule No. 300 100829 Made IN JAPAN 110mm