12” Slide Rule

Lawrence Slide Rule 250-BT 1940’s Vintage Lawrence Engineering Service w/Box

Vintage Slide Rule with Leather Case

Vintage Lawrence Engineering Service Wood 8” Slide Rule Wabash Indiana USA

VTG C-Thru Slide Rule #27, Mechanical Analog Calculator, 6.5inches,Paper Sheath

LAWRENCE ENGINEERING SERVICE - ENHANCED MANNHEIM, Mod 8-B, Wood Frame Slide Rule

Vintage KEUFFEL & ESSER K&E Beginner's Slide Rule N4058W with Original Case USA

Kurffel & Esser Co Slide Rule