M-4 tanks. M-4's are thoroughly tested before being shipped to the battlefront. The tank shown here, at the Aberdeen, Maryland, proving grounds carries both cannon and machine gun in the revolving turret. This is the welded hull construction

Actual size of negative is C (approximately 4 x 5 inches).
Caption card lists some of the printing history of image.
Title and other information from caption card.
Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944.
More information about the FSA/OWI Collection is available at http://hdl.loc.gov/loc.pnp/pp.fsaowi
Film copy on SIS roll 33, frame 651.