I found this canteen and cover at an antique store today. Been doing research all afternoon and getting some conflicting results. Can anybody tell me what type of canteen this is? I am curious about the markings on the cap too…not sure if its WWII or WWI? The case it came in is marked 1943 not sure if it was originally paired with the canteen. Also, the custom engraving on the side is interesting…..Thanks in advance