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Circular slide rule, American, 1942-1945.

Science Museum Photo Studio

Circular slide rule, American, 1942-1945.
2 9 c m
actual image size: 32cm x 21cm


Circular slide rule used for aviation calculations relating to the Pratt & Whitney S3C4-G aero engine. Made of plastic by Cox & Stevens Aircraft Corporation, Mineola, New York.

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