Public domain
Conversion. Automobiles to 40 mm. anti-aircraft guns. Applying automobile production methods to machining of 40 mm. anti-aircraft gun barrels in a former automobile plant. Five cutting instruments work at the same time. Under the old single-operation methods of gun making, only one of these could wo
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Credit lineConversion. Automobiles to 40 mm. anti-aircraft guns. Applying automobile production methods to machining of 40 mm. anti-aircraft gun barrels in a former automobile plant. Five cutting instruments wor. 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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