1 Ducat - John William

John William ruled Saxe-Eisenach for barely a decade before the line extinguished with his death in 1741, at which point the duchy reverted to Saxe-Weimar under the Ernestine inheritance system that had been parceling and reuniting Thuringian territories since the 1485 Leipzig partition. Ducats of his reign are scarce simply because the duchy was small — Eisenach's mint output never approached that of the wealthier Ernestine branches at Gotha or Weimar.

Fr#2916 confirms this as a Franconia-catalogued rarity, with few examples documented in major collections.