4 Mariengroschen - Charles William Ferdinand

Charles William Ferdinand — who would later command Prussian forces at Jena-Auerstedt in 1806 — was still ruling a solvent, relatively stable principality when these were struck. The 4 Mariengroschen was a workhorse denomination in the Lower Saxon currency system, its value rooted in the old Mariengroschen accounting unit that Brunswick mints had been producing in various forms since the late medieval period. The short four-year window of this type likely reflects a recoinage or tariff adjustment rather than a political rupture.