Poland/Kurland, Gotard Kettler (1561-1587), two-dollar 1578, Mitawa mint.
Coin with the crowned monogram of Stefan Batory, a harp below it, and on the reverse the Pahon of Lithuania and the denomination marking below it (II)
quite a nice readable piece, with an irregular disc shape
silver, weight 0.31 grams, diameter 14 mm