⅔ Thaler - Frederick William II

The 2/3 Thaler denomination — essentially a Gulden equivalent — was a concession to the currency fragmentation of the Holy Roman Empire, where north German states maintained Thaler-based systems while much of the south and west reckoned in Gulden. Prussia struck this fractional denomination to ease cross-regional commerce, not from any internal monetary logic. Frederick William II, who inherited the throne from Frederick the Great in 1786, oversaw a treasury already showing strain from his predecessor's wars and his own costly interventions in the Dutch crisis of 1787.

The 1792–1794 window aligns precisely with Prussian military engagement in the War of the First Coalition against Revolutionary France.