Found in a box of junk cartridges.
30-06 Brass case
12.00 Oclock - J.58
9.00 Oclock - T H
3.00 Oclock - S
6.00 Oclock - 7.62
Not sure about the “J” at 12 Oclock. Could also be some sort of symbol.
Heavy primer ring crimp like found on the USC Co cartridges for the Marlin MG. Could be green lacquer in ring. Hard to tell. Brass colored primer is very flat. Berdan, 2 flash holes. No bullet but looks like it had a roll crimp. Traces of dark sealant inside mouth.
Whatzit?? Probably something very common. I never find anything rare.