1 Thaler - Frederick III

Frederick III ruled Saxe-Gotha-Altenburg for over half a century, from 1732 until his death in 1772, making him one of the longer-reigning dukes of the Ernestine line. The duchy itself was a product of the exhausting succession divisions that repeatedly fragmented the Wettin inheritance across Thuringia, and by 1764 its taler coinage was minted to the Reichstaler standard established by the Convention of 1753 — a monetary agreement between Austria and Bavaria that most of the German states eventually adopted to stabilize interregional trade.

Saxe-Gotha-Altenburg was abolished in 1825 when Frederick's line died out, its territories redistributed among neighboring Ernestine duchies.