A nice piece.
Obverse: coat of arms of Gdansk in a cartouche supported by two lions, in a chained border, in the outer border a legend beginning with a shield with a bear paw sign and a mint mark:
COIN*CIVIT:GEDANENSIS*1617+;
Reverse: bust of Sigismund III Vasa wearing a crown to the right, with the Order of the Golden Fleece on a chain of 6 flints, wearing armor and a cloak studded with jewels, in the chainmail, in the outer rim a legend:
*SIGIS:III-D:G:REX-POL:M:D:L:R:PRVS:+;