1 Prague Groschen Counterstamped

Amberg, a silver-mining town in the Upper Palatinate, periodically counterstamped foreign coins to authorize their local circulation rather than mint its own. The Prague Groschen — struck in enormous quantities at Kutná Hora under the Bohemian crown — flooded regional markets throughout the late 14th and early 15th centuries, making it the obvious candidate for such treatment. The Amberg counterstamp effectively redenominated or re-validated the host coin for municipal use.

The date range spans the reign of Wenceslaus IV and into the Hussite period, when Bohemian coin production became increasingly disrupted.