I just grabbed a case of Czech 7.62x25 from Marstar & it appears to be all steel case. I was a little surprised that once I removed the wire seal on the front of the case, what was inside was individual cardboard boxes of 40 rounds, the rounds are not in a sealed spam can. The ammo is in great shape though, no corrosion that I can see etc, looks fine.
Now to try out this Polish Tokarov!
Cheers
Jay