Duchy of Courland and Semigallia (Mitau) 6 Groschen 1764 - Ernst Johann von Biron (1763-1769)
2.98g. VF-/VF. Slightly bent.
Mintmaster’s initials I·C·S – Justus Carl Schröder. Engraver’s initial G on shoulder.
KM 27; Haljak 1734a 2R; Kopicki 4097 R4. Very rare!
Issue historically associated with present-day Latvia, Poland and Russia.