Public domain
Production. Marine engines. A drilling operation on the crankshaft of a marine engine for the Navy. This workman in a Midwest plant can certify that every precaution is taken to assure the finest quality in every crankshaft produced. Continental Motors, Michigan
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Credit lineProduction. Marine engines. A drilling operation on the crankshaft of a marine engine for the Navy. This workman in a Midwest plant can certify that every precaution is taken to assure the finest qual. 1942-01-01. Palmer, Alfred T., United States. Office Of War Information. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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