Grand Duchy of Warsaw - 1811

3 Grosze
Obverse - Grand Duchy of Warsaw - 3 Grosze - 1811 Reverse - Grand Duchy of Warsaw - 3 Grosze - 1811
Obverse - The Saxon coat of arms combined with the eagle of Poland.
Reverse - 3 GROSZE 1811
Size, 26 mm.
 
This piece is so worn that I can't tell which of the two mint-master marks is in use.