Concise Circular Slide Rule No. 28

VINTAGE ANTIQUE CONCISE CIRCULAR SLIDE RULE No. 28

Concise Circular Slide Rule No. 28 advertising PIONEER PARKER HANNIFIN MINNEAPOL

#894 VINTAGE QTY 2 1960s CONCISE CIRCULAR SLIDE RULE No.28 MADE IN JAPAN

B&W Concise Circular Slide Ruler No. 28 Made in Japan w/ Case & Instructions

Vintage CONCISE CIRCULAR SLIDE RULE No. 28 Kenworth Diesel Truck w Sleeve Manual

Vintage Concise Circular Slide Rule No.28 Original Pouch Japan

Concise Circular Slide Rule & Conversion Table No. 28 American Standard Japan