A nice piece of a typologically rare item with a dot above the shield with the coat of arms of Prussia.
Obverse: in the pearl border the coat of arms of the city in the shield, in the outer border the legend:
*KASIMIR-D G R POLONIE;
Reverse: in pearl border shield with coat of arms of Prussia, in outer border legend:
*MONE[]RVNENSIS;
Silver, diameter 19.5 mm, weight 1.46 g.