A nice piece with a very nice luster.
Variant with legends started with a cross in a circle and a double circle. Variant with an error in the king's name KASIMRVS.
Obverse: in the pearl rim the coat of arms of Elblag, in the outer rim the legend:
COIN-CIVIT-ELVI;
Reverse: in the pearl rim a shield with a crowned eagle, in the outer rim legend:
KASIMRVS-R-POLONI;
Silver, diameter 19 mm, weight 1.48 g.