A very nice, slightly deficient piece.
Very well preserved mint luster.
Obverse: bust of the ruler to the right, in the rim the legend:
FRID-WILH-D G-M-B-S-R-I-ARC-& P-E-;
Reverse: crowned shields of arms, under the crown the denomination VI, under the shields the date 16-80, in the rim the legend:
SUPREMUS DUX IN PRUSSIA-;