Small East European (?) Silver Coin For ID [solved]

It looks like an easy one to ID with all the well preserved detail but I'm drawing a blank. Hopefully someone will recognize this coin.

18mm, 0.8gr



Thanks in anticipation.

Hello,
I think it's an Alexander Jagiellon półgrosz.
Have a look here : https://en.numista.com/catalogue/pieces42659.html

I think it could be this one: https://en.numista.com/catalogue/pieces125108.html

Poland. King Sigismund I "Old"

Thank you gentemen. I was looking at the right country but 125 years too late. I think this could be my oldest silver coin.

Quote: "pnightingale"​Thank you gentemen. I was looking at the right country but 125 years too late. I think this could be my oldest silver coin.
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​The one Cycnos posted is the correct ID, this is Alexander Jagiellon not Zygmunt/Sigismund.

Would anyone care to offer an opinion as to the grade and price? Anything before 1700 is firmly outside my comfort zone.

Thanks so much for the lightning fast identification gents, and for sharing your priceless knowledge.

This might help answering your questions
http://wcn.pl/archive?q=P%C3%B3%C5%82grosz+koronny+Krak%C3%B3w+Aleksander+