This is a desirable example of a York Safe & Lock Co. manufactured U.S. M3A1 37mm anti-tank gun with carriage. Less than 19,000 of these were reportedly manufactured for the war effort between 1940-1943. They were the first standard anti-tank gun of the U.S. infantry, and were able to be towed behind a Jeep. Although initially effective, rapid improvements in German tank armor quickly rendered these guns ineffective, with many replaced by the more powerful 57mm M1 anti-tank gun in the European and Mediterranean Theaters, although the 37mm M3 guns continued to see effective widespread use in the Pacific against the smaller Japanese tanks and as an anti-personnel weapon. This example is 1943 dated on the left of the breech. Absent breech block in the gun itself, with two breech blocks and some small parts included separately in the compartment on the carriage. Also includes a cleaning rod assembly.