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Conversion. Automobiles to 40 mm. anti-aircraft guns. Workers in a former automobile plant machining the firing end of a 40 mm. anti-aircraft gun barrel for the U.S. Army. After the tip has been properly machined and threaded, a special addition will be put on it to protect the firing crew. Chrysler Corporation, Highland Park, Detroit. Sourced from the Library of Congress.

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Conversion. Automobiles to 40 mm. anti-aircraft guns. Workers in a former automobile plant machining the firing end of a 40 mm. anti-aircraft gun barrel for the U.S. Army. After the tip has been properly machined and threaded, a special addition will be put on it to protect the firing crew. Chrysler Corporation, Highland Park, Detroit. Sourced from the Library of Congress.

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