6 Kreuzers - William II and Frederick William

Hesse-Kassel's political situation in the early 1830s was unusually turbulent for a small German state. William II, deeply unpopular and effectively incapacitated by illness, was forced to accept a liberal constitution in 1831 following widespread unrest — one of the few German rulers pressured into constitutional concessions during that revolutionary wave. His son Frederick William assumed co-regency that same year, and joint-reign coinage followed almost immediately as a practical acknowledgment of the transfer of real authority.

The co-regency arrangement on the coinage is the historically distinctive element here. William II died in 1847; Frederick William had been running the state for over a decade before that.