WW2 Thompson 50 Round Drum Pouch with shoulder strap, these were manufactured by a number of different manufacturers, the early design had no shoulder strap and only had a rear belt loop to carry it. The 50 round drum magazine had a very short life with the Military due to a number of reasons but the pouches have been seen with date stamps as late as 1944. By November 1944 the US Government had 242,738 “serviceable” drums on hand when they decided to make them obsolete and destroy the majority of them.
This pouch is stamped U.S on the front flay and manufactured by the G.B. MFG. CO. INC. which is stamped and dated 1942 under the front flap (this was the standard marking place for the manufacturers to stamp their name and date). in NOS un-issued condition, this is one of the most common and easy to find pouch with these markings.