Unknown .22 lr Cartridge and Box

Can anyone assist in ID’ing this .22 lr?
Two-piece box, 50-ctg’s, no headstamp. I have 3 box, all with different numbers, that I assume to be lot numbers.

Chris–I can’t ID the box but if it helps it is most likely pre-1940. Almost all .22’s made after WW-II use brass cases. It looks like a military contract (most likely NOT US made) of some sort to me.