Public domain
Machine crankcase assembly. Pratt and Whitney Aircraft Machine Corporation. East Hartford, Connecticut
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineMachine crankcase assembly. Pratt and Whitney Aircraft Machine Corporation. East Hartford, Connecticut. 1941-01-01. Collier, John, Collier, John, Jr.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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