The Prussian eagle (with the FE monogram, rarely visible, even on UNC or higher demonination coins) with a crown at the top, surrounded by a wreath of oak leaves.
Obverse script
Latin
Obverse lettering
180 EINEN THALER
1
GROSCHEN:
GR.HERZ.
POSEN
1816
A (Translation: 180 [of] one thaler 1 Groschen Grand Duchy of Poznań(or: Posen) 1816 A)