1 Thaler - Gebhard VII and John George I

Mansfeld's silver output in the 1540s was driven almost entirely by the extraordinary productivity of its copper-silver mines in the Harz foothills — among the most actively worked in the Holy Roman Empire at the time. Gebhard VII and John George I issued jointly under the complex co-rulership arrangements that characterized the fractured Mansfeld comital lines, a structure that produced numerous short-lived paired issues before the county's eventual partition.

Tornau's numbering of 899–900 reflects two distinct die combinations for this type, a product of the county's high minting tempo during these years.