Hammered coin - Zygmunt III ? help please [решено]

Found this coin in a lot. Its a little rough and I can't find a date.

It seems to have the S monogram with a six on the obv and a crown over 2 flat topped, shields with crest.
Left shield appears to be the Polish eagle and the right (best guess) is the knight on horseback.
Around 17.5mm in size

Any help would be great.

Please ask Piotr:
https://en.numista.com/echanges/profil.php?id=62681
He will know all that there is to know

Looks like a Polish-Lithuanian solidus Schilling 1616 (Sigismund III).

Yes indeed Andy
SIGismundus III Dei Gratia REX Poloniae Marchi Dux Lithuaniae
Sigismund the 3th, by gods grace king of Poland, grand duke of Lithuania
SOLIDUS Marchi Dux LIThuaniae
Shilling of the grand duke of Lithuania

You guys are awesome Thank you!

I'll add it to the catalog as soon as I get a chance.

Yes, this is Lithuanian schilling 1616. You can see the clover at 11 , reverse side. This is the sign of Jan (Johan) Trillner, engraver in Vilnius mint of this time.