I am reletively new to this hobby and need help from people who know stuff.
I found this coin during clean up at some old house and wonder what it is. Looks similar to one of Polish-Lithuanian Commonwealth shilling of Sigismund III era (due to S letter on one of the sides - I presume this is the obverse), but I simply dont know. It is worn and scarce and probably worthless, but I would appreciate your help a lot.
sorr
y for quality of these photos.

cheers