Obverse: Portrait of John II Casimir Vasa facing right Obverse legend: “IOAN · CAS · REX ·” Reverse: Rider on the horse (Vytis) Reverse legend: “1664.SOLI.MAG.DVC.LI” Denomination: Szeląg = 1/3 Grosza (solidus, shilling) Country: Polish Lithuanian Commonwealth Ruler: John II Casimir Vasa was King of Poland and Grand Duke of Lithuania during the era of the Polish–Lithuanian Commonwealth, Duke of Opole in Upper Silesia, and titular King of Sweden 1648–1660. Year: 1664 Mint: Vilnius Metal: Copper Weight ± 1.43 g