1 Thaler - John Casimir and John Ernest II

John Casimir and John Ernest II ruled Saxe-Coburg-Eisenach as co-dukes following the fragmentation of the Ernestine Saxon lands — a dynastic subdivision that had been grinding on since the Partition of Leipzig in 1485 carved the Wettin inheritance into competing branches. By 1577, the Ernestine line had split so many times that joint rule by brothers was a practical necessity rather than a political choice. Saxe-Coburg-Eisenach itself would survive only until 1596, when John Casimir inherited Saxe-Coburg outright following his brother's death.

The Davenport reference GT I#9756 places this squarely within the German Taler series, a designation reflecting the standardized weight framework established by the Imperial Coin Ordinances of 1559 and 1566.