442nd
I don't know just what they were useing #9CS for as late as Vietnam era. In WWII they were used for training purposes, mostly aerial gunner training as most of these guys had never held a gun before much less did they have an idea how to lead a target. At $60 per can I'd say you probably did pretty well. How many rounds per can? Can you post some pics. or tell us the markings on the cans? Those are genuine military collectables and to the right person probably worth alot more than you paid. Before you open them, if you don't care to keep them, try posting a can on Gun Broker and see what they would bring. Hey, I'd be interested. Just don't use them for blasting.
Are they really sealed spam cans or 50 cal. cans like most other Vienam era shells?
James B.