Serbian tokens

Both ....

- uniface
- steel
- 26.5 mm

I can't read Serbian.
What's this? bus token?

Thanks for help.

I found this on a nostalgia blog called "backtoyugoslavia":
http://picbear.online/backtoyugoslavia


It says they were "turnstile tokens" and there's also a "busstation" hashtag (whatever that means) from Novi Sad, now in northern Serbia. So it looks like your hunch was right.