Lawrence Engineering Service Slide Rule Peru Indiana

Lawrence DeLuxe Slide Rule Lawrence Engineering Service Peru, Indiana

Vintage Lawrence Engineering Service Deluxe Slide Rule, original box Made in USA

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Vintage Lawrence Engineering Service Wooden SLIDE RULE w/ Original Box Peru, IN

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

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