1 Prague Groschen Counterstamped

Lindau, a free imperial city on Lake Constance, lacked a mint of its own for much of the medieval period and solved the problem pragmatically: foreign silver was countermarked and recirculated as locally sanctioned currency. The Prague Groschen, struck in Bohemia under the Luxemburg kings, circulated widely across the Holy Roman Empire and made an obvious candidate for this treatment.

The Krusý reference places this counterstamp firmly within the city's late 14th to early 15th century monetary practice — a period bookended by the death of Charles IV and the disruptions of the Hussite conflicts, which eventually choked the supply of Bohemian silver moving westward.