Latvia Courland 3 Groszy 1598 Mitau. Wilhelm Kettler(1587-1616). Averse: Bust facing right surrounded by legend. Lettering: MONE · ARG · CVR ·. Reverse: Eagle beside horseman above legend and under value. Lettering: III GROS · AR · TR DVCVM · CVET · SE · 98. Edge Smooth. Silver. Kop. 4042; Fed 1019; KM 4. NGC MS 64 ONLY ONE COIN IN HIGHER GRADE