A nice, glossy piece.
Variety with an asterisk and double circle as legend starting marks.
Variety of legend with KASIMRVS error not described in Kopicki and CNG.
Obverse: in the pearl rim the coat of arms of Gdansk, in the outer rim the legend:
COIN:CIVIT:DANC;
Reverse: in the pearl rim a shield with a crowned eagle, in the outer rim legend:
KASIMRVS-R-POLONI;
Silver, diameter 21 mm, weight 1.37 g.