4 Ducats - Johann Christian and Georg Rudolf

Johann Christian and Georg Rudolf were brothers ruling Liegnitz-Brieg jointly following their father's death, a co-regency arrangement that produced some of the most distinctive multiple-ducat issues from Silesia in the early seventeenth century. Joint-rule coinages of this type required both likenesses to appear, which drove demand for larger flans — hence the four-ducat format where a single or double would have otherwise sufficed for the denomination's practical purpose.

The Friedensburg reference places this firmly within the Silesian series he catalogued exhaustively; Fr#3160 is among the scarcer joint issues with survivors concentrated in a handful of European institutional collections.