Keuffel & Esser K&E SPERRY Pocket Watch Style Slide Rule

Vintage Keuffel & Esser K&E 4081-3 Slide Rule 1947 - Rare *READ*

vintage K&E slide rule

Vintage Keuffel & Esser Co. K&E Slide Rule 4088-3 With Leather Case Pat 1900-08

K&E Keuffel & Esser Vintage Slide Rule Ruler 10.5" Co. New York, USA

Keuffel & Esser Slide Rule N.Y. Pat. 1900s Vintage K&E Math Tool w/ Case

Vintage KEUFFEL & ESSER K&E Beginner's Slide Rule 4058D with Original Box USA

Antique 1900 Pat. Keuffel & Esser Co NY K&E Wood Slide Rule Vintage