1/2 Thaler - John Casimir and John Ernest

Saxe-Coburg-Eisenach existed as a joint duchy only between 1572 and 1596, when John Casimir and John Ernest ruled together following the partition of Ernestine Saxony — a territorial division that had been fragmenting the Wettin inheritance since the Capitulation of Torgau in 1485. Coins struck in the names of both brothers simultaneously were a deliberate assertion of co-sovereignty, legally significant in an era when partition inheritance could be contested by either party or by the broader Ernestine line.

The short window of the joint reign, combined with modest mint output from Coburg, keeps survivor populations low.