Watch List notes:

Courland 3 Groszy 1764 ICS Mitava. Ernst Johann Biron(1762-1769). Averse: Bust right. Averse Legend: D • G • ERNEST • IOH • IN • .... Reverse: 2 crowned shields of arms. Billon. KM 26; Iger KuB.64.1 (R3) RARE