A gentleman from Croatia would like some help identifying what looks like a gold coin

I received this in email. I am assuming he was referring to these forums and not Collectors Universe.

"Dear sir !!!

I really have no idea what is this.
Old Coins is not my area. It's an absolute mystery for me. A coin, a decoration, a medal .......!?!
Please can You help me.

Diameter: 14 mm
Weight: 0.3 g
Gold: 8 carats (333)

I have a language barrier and that’s why I don’t understand everything well. Can You please ask a question on the forum instead of me ( and send me the link ) !?!

Thank You very much in advance for that.
Sincerely, prof. Zlatko Čondić from Croatia"​

His English seems pretty good to me. Help him identify this coin if you can. I'm afraid I have no idea what it is, though it looks old.

 

Sounds plausible to me.

 

I know next to nothing about foreign coins, but I think know a lot about manufacturing processes, and the above coin definitely does not look like a casting to me.

In fact, it appears to me that it was made by striking details into one face only, as if with punches and a hammer. One side of the piece displays perfect transference of outdented details from the indented details on the opposite side.

That's not to say that this isn't a coin. As I wrote before, I know nothing about foreign coinage. Not knowing any better, I'll offer the benefit of the doubt, and accept the possiblity that some early coiners may have manufactured their coins this way, until I learn differently. I'll leave that conclusion to others . . .