Saxe - Weimar - Eisenach - 1791

3 Pfennig
Obverse - Saxe - Weimar - Eisenach - 1791 Reverse - Saxe - Weimar - Eisenach - 1791
Obverse - Coat of Arms on a shield.
Legend, S. W. U. E.
Reverse - 3 PFENNIG 1791
 
Carl August was the Duke from 1775 until 1830 (Krause says 1828).