A very nice, defect-free and mostly unbent piece.
The first vintage of the Duchy's ducats.
Obverse: head of Frederick Augustus to the right. In the rim:
FRID- AVG- REX SAX- DVX VARSOV-.
Reverse: bipartite crowned shield of the coat of arms (Saxon-Polish) above two crossed palm branches. Under the branches initials I-B-, on the sides of the crown date 18-12. In the rim:
AUREUS NUMMUS DUCAT- VARSOV-.
Gold, diameter 21 mm, weight 3.48 g.