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. (without ET SE dots). Silver. KM 4. Iger 98.1.e (R2) RARE