Public domain
Twenty-millimeter machine guns for planes. American power in the air grows rapidly as machine guns of the finest quality pour from our production lines. These guns, entirely completed and ready to fire, await shipment from the large converted auto plant in which they were made. Oldsmobile, Lansing,
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Credit lineTwenty-millimeter machine guns for planes. American power in the air grows rapidly as machine guns of the finest quality pour from our production lines. These guns, entirely completed and ready to fir. 1942-01-01. United States. Office For Emergency Management, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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