Groschen - Albert I and Charles I

Münsterberg-Oels was one of the fragmented Piast duchies of Silesia that passed under Bohemian suzerainty during the fifteenth century, and the joint coinage of Albert I and Charles I reflects the co-rule arrangement that was common among the Silesian Piast lines as inheritance repeatedly subdivided territories. The two brothers issued coins together during a period when Silesian groschen were heavily influenced by Bohemian and Meissen weight standards, though local duchies frequently debased slightly relative to their larger neighbors.

The Schultze and Kopicki references place this type among the rarer co-ruler issues of the region — surviving examples are scarce enough that die studies remain incomplete.