2nd Pattern USMC covers were made between the years 1941-1942, and were issued directly to marines serving in the pacific theater during WW2. As with most 2nd pattern covers, most of the depot markings have worn off, but the cover still has the soldier's name stamped on the bottom.
The canteen is marked: U.S. S.M. Co. 1944, and the canteen cup is marked: U.S. Foley Mfg. Co. 1944.
Thanks to : tylerjamest