A nice piece with numerous sheet metal defects typical of this issue.
Rubbing of the highest parts of the relief, background blemishes.
Second vintage of 1/3 thaler of the Duchy of Warsaw.
On the reverse, initials IS by Jan Stockman.
Obverse: bust of the prince to the right, in the rim legend:
FRID-AVG-REX SAX.DVX VARSOV;
Reverse: crowned coat of arms of the Duchy of Warsaw on two palm branches, date 18-12 at top, initials I.-B. at bottom and denomination 1/3 TALARA;