A nicely preserved very well stamped piece.
An undescribed variety in Shlapinsky and Belopolsky.
Obverse: crowned royal monogram in the pearl rim, in the rim legend:
POTIORQ3:METALLO EST, in outer rim legend:
DAT:PRETIVM:SERVATA:SALVS::;
Reverse: in the pearl rim a crowned shield with the coats of arms of the Crown, Grand Duchy and Snopes, in the field of the shield the denomination XXX GRO/-POL-, on the sides of the shield initials A-T, in the outer rim legend:
COIN:NOVA:ARG:REG:POL:1663:;