A nice, well struck piece.
Variety with bust type 10 according to the typology of D. Marzęta.
Interesting variant with RE-X dividing error.
Obverse: royal bust with crown, and armor, with tubular orifice seen from the side, to the right, in the rim legend:
SIG-3-D:G-RE-X-PO-M-D L;
Reverse: denomination III, below it the coats of arms of the Eagle of the Crown, the Sheaf of the Vasa dynasty and the Pose of the Grand Duchy of Lithuania between the ornaments, below it the legend in three lines:
GROS ARG/TRIP REG/POLONI, below it an abbreviation of the date 9-6 separated by the sign of Daniel Koste and the coat of arms Lewart with initials I-F;