Slaaibak here from South Africa.
I purchased a 91/30 PU Sniper over the weekend and it came with a can of 7.92x54R, and the most interesting part is - It’s North Korean.
I have a nice little 7.62x39 and 7.62x54R headstamp collection but have not seen many references of these on the net.
The Galvanized Tin had no other marking other than “440” on the top
The Opener is marked 93.
and rounds are Yellow tipped marked 93 over 86
the 20round packs had 5 or 6 marked on the wrappers
And the Copper Washed Steel cased are more Yellow(brass like) than the Chinese or Russian ammo
I believe these can from Angola during the South African Border War 1966-89.