A7 SUN HEMMI Slide Rule Slide Ruler No, 2664S Japanese Antique Stationery

Vintage ACU-MATH 5 Inch Engraved Pocket Slide Rule - NEW IN BOX Model # 1240 NOS

K&E Keuffel & Esser Co Decilon Vintage Slide Rule 1947 1961 w/case

Ruler Circular Slide Rule No. 270 Made IN JAPAN

LEITZ SLIDE RULE WOODEN 11" VTG #2975 +POST RED CASE SEE DETAIL PHOTOS

Keuffel & Esser K&E 20-inch Slide Rule w/ side K scale- Serial #681608 RARE case

RELAY Slide Rule No. 153 Bamboo & Leather Case, USAFI Study Guide 1962 VTG

Vintage Fullerton No.1450 Circular Slide Rule Calculator Japan w/ Case