Concise 100829 Ruler Circular Slide Rule 300 Diameter 110mm 4.3inch

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

Concise 100829 Ruler Circular Slide Rule 300 Diameter 110mm

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

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

Concise Ruler Circular Slide Rule No.300 100829 110mm