1 Thaler - Frederick August

Nassau's 1809 Thaler was struck in the immediate aftermath of the duchy's reorganization under the Confederation of the Rhine, which had dissolved the old Nassau-Usingen and Nassau-Weilburg lines and consolidated them under Frederick August just two years prior. The coin was issued into a German monetary environment still adjusting to Napoleonic political reordering, with French influence pressing hard on sovereign coinage prerogatives across the Rhine states.

Frederick August died in 1803 — making any coin bearing his name and dated 1809 a posthumous issue struck under the authority of his successor, Frederick William, using a regnal attribution that requires careful attention to the duchy's transitional administrative records.