I have two 7.62x39 that I can only guess at the maker.
#1–Ball loading; No Headstamp; bright blue primer annulus, flat nickled primer. It looks to me like a Lake City made round. If so, what was it for? If not, who did make it and for what purpose.
#2–Ball load; Headstamp just “1985” at 6; flat brass primer with red annulus. It looks to be a product of Yugoslovia. What purpose?