| Country of Origin | United States |
|---|
Check the listing for details. Vtg Engineering Instruments Inc 10" Slide Rule 250-V W/Box/Case/Instruction Book. Condition: Used, Made in United States. Listed at 15.00 USD. George Lee Lawrence (1901–1976) established a firm in Chicago to make slide rules for photography. In 1938 he relocated once more to Peru, Ind., probably to enlarge the factory. Thus, this rule dates between 1938 and 1947.
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