Avery nice, beautifully struck piece for this type of coin.
A rare variety with the unusual abbreviation SERVAT in the obverse legend.
Obverse: crowned royal monogram in pearl rim, legend in rim:
POTIORQ3:METALLO EST, in outer rim legend: DAT:PRETIVM:SERVAT:SALV:;
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 the initials A-T, in the outer rim the legend:
COIN:NOV:ARG:REG:POL-1665;
