1 Thaler - John Casimir and John Ernest

Saxe-Coburg-Eisenach existed as a unified duchy for barely two decades. Created in 1596 when the Ernestine line partitioned yet again, it was ruled jointly by brothers John Casimir and John Ernest until John Casimir's death in 1633 effectively dissolved the arrangement. Joint-rule thalers of this type were struck specifically to assert the legitimacy of dual sovereignty — a political performance as much as a monetary one, common among the fragmented Ernestine branches of the Wettin dynasty competing for status within the Holy Roman Empire.

The Davenport GT I classification places this among the German territorial thalers, a notoriously difficult series to collect completely given how short-lived many of the issuing entities were.