Polish–Lithuanian Commonwealth  ???

Can a friend help me identify this coin?

15.5 mm diameter, 0.6 g, probably copper

Tks,

Marco

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Citeer: "Apollaro"​Better Photos
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​Good afternoon, Marco. Is that the Polish heraldic eagle? I am looking at Medieval Polish coins, and the bird is similar. It looks much like this on 'modern' coins.

https://www.ebay.com/itm/c1509-POLAND-1-2-GROSCHEN-MEDIEVAL-SILVER-Sigismund-I-Nice-/181839668127

But I am also looking at the Grand Duchy of Lithuania and the Kingdom of Bohemia, which also have the eagle:

https://en.numista.com/catalogue/lituanie-1.html#c_lituanie3886

Hope this helps. Regards, Alex.

Dear Alex, I went through that possibility but I also gave up.

https://en.numista.com/catalogue/pieces119300.html


It is not easy. Let's see if anyone else has any ideas

Marco