2 Reichsthaler - John Casimir and John Ernest

John Casimir and John Ernest ruled Saxe-Coburg-Eisenach jointly following a dynastic partition that left the Ernestine branch of the Wettin family controlling an increasingly fragmented patchwork of Thuringian territories. Joint-rule coinages of this kind were a deliberate political statement — dual portraiture on a large silver piece affirmed shared sovereignty and discouraged either party's creditors or rivals from exploiting succession ambiguities. The duchy itself was extinguished at John Casimir's death in 1633, when his lands were absorbed back into Saxe-Coburg.

At 60 mm across, these are among the larger double-thaler formats produced in the Ernestine mints, struck across a decade-long window rather than a single campaign — individual pieces can vary noticeably in die state and surface quality as a result.