I can't tell you for sure if it's the WW 2 surplus, but I've got a gallon glass jar 3/4 full of 4831 that I believe my dad bought, of the WW 2 surplus powder. I know he used the powder into the 70's on reloads for his 270 Win. It's been sitting in a cool dry place since then and after his passing last Feb, I grabbed it, although I'm not too sure I'd want to use it.

Maybe the paper bags explain why the powder is in a glass jar.

Cameron Hughes