Piece with decent details in dark patina.
Obverse: head of the king to the right, in the rim legend:
STANISLAUS AUG.D.G.REX POL-M-D-L-;
Reverse: crowned five-field escutcheon with the coats of arms of the Crown, Grand Duchy of Lithuania and Ciołek of the Poniatowskis, the escutcheon perched on a laurel wreath with 3 berries in each branch, below initials E.B., in the rim legend:
GROSSUS POLON:TRIPLEX-1788-;