7.62x54R Bulgarian? silver tip pull down

[alpha_romeo_XV]

[Jimja]

Bulgaria officially uses Cyrillic, their Warsaw pact code is circle 10. In this case, Bulgaria had nothing to do with it

Poland has the Warsaw pact code of circle 11, also not it

What you have is Hungarian silver tip steel case steel core bullet, 147 grain, great to use in a PSL (Make sure to clean it afterwards, it's corrosive)

LPS is the designation for light ball.
Gz means copper washed steel case
Gsz means lacquered steel case

Usually the factory code comes last in the lot number string, so this is most likely a product of factory "21".

Great ammo at a great price, enjoy!!

[Jimja]

Completely off topic, but your username reminded me of this great Petrolicious video, I think you'll like it

https://petrolicious.com/films/never-enough-alfa