Public domain
Antiaircraft gun carriage. Thirty-seven millimeter antiaircraft gun carriages come down the assembly line. In the foreground, the frame for the carriage is assembled. War production program scene in a Pennsylvania heavy industry plant now converted to the production of vitally needed military equipm
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAntiaircraft gun carriage. Thirty-seven millimeter antiaircraft gun carriages come down the assembly line. In the foreground, the frame for the carriage is assembled. War production program scene in a. 1941-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.