1/2 Thaler - John William

Saxe-Jena was among the most short-lived of the Ernestine Saxon partition states, surviving only from 1672 until 1690 when it was absorbed back into Saxe-Weimar following the death of John William without a male heir. This half thaler was struck just two years before that extinction, making the entire coinage of the duchy a compressed series spanning fewer than two decades.

John William's court at Jena maintained a mint despite ruling a territory of negligible political weight — a common vanity of the fragmented Ernestine line, where dynastic prestige demanded coinage regardless of economic necessity.