A nicely preserved piece. Well stamped.
Variety without dots at the POL in an undescribed variant in Shlapinsky and Belopolsky.
Obverse: crowned royal monogram in the pearl rim, legend in the rim:
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:
MONET:NOV:ARG:REG:POL:1663;