Vintage LAWRENCE Deluxe SLIDE RULE 10-B, Lawrence Engineering Peru, Indiana USA

Lawrence Engineering Service Slide Rule Peru Indiana

Vintage Engineering Instruments Inc Peru Indiana Wood Slide Rule w/ Instructions

Lawrence Deluxe Slide Rule W/ Box Peru Indiana Engineering Service

Vintage Lawrence Engineering Service Peru Indiana Slide Rule 10-B Wood USA

OLD WOOD SLIDE RULE LAWRENCE ENGINEERING PERU, INDIANA OWNED BY MJ BAKIRAKIS

Vintage Wood Slide Rule Lawrence Engineering Peru Indiana with Original Case

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