POLAND, Slask (Silesia). Legnica-Bzerg (Liegnitz-Brieg). Johann Christian, with Georg Rudolf. 1602-1621. AV Dukaty (20.5mm, 5h). Dated 1610 CT. Armored bust of Johann Christian right / Armored bust of Georg Rudolf left. Saurma, Schlesische 98; KM 102; Friedberg 3166. In NGC encapsulation graded MS 64.