Public domain
Conversion. Automobiles to 40 mm. anti-aircraft guns. With high-precision instruments, anti-aircraft gun barrels made in a former automobile plant are measured to a ten-thousandth of an inch. Chrysler Corporation, Highland Park, Detroit
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Credit lineConversion. Automobiles to 40 mm. anti-aircraft guns. With high-precision instruments, anti-aircraft gun barrels made in a former automobile plant are measured to a ten-thousandth of an inch. Chrysler. 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.