A very nice piece with well-preserved luster.
Obverse: royal bust in crown, and armor, with orifice, to the right, in the rim legend:
SIG III D---G-REX PO M-D L-;
Reverse: denomination marking -III-, below it the coats of arms of the Eagle of the Crown, the Sheaf of the Vasa dynasty, and the Hail of the Grand Duchy of Lithuania, next to the eagle the mint initial P, below it the legend in two lines:
GROS ARG/TRIP-R PO-, below it the coat of arms of Levart in a shield separating the date -16-01-;