Wolfgang George ruled Stolberg-Stolberg during one of the most monetarily chaotic periods in German history — the Kipper- und Wipperzeit, a currency crisis of 1619–1623 in which dozens of small states debased their coinage aggressively, then clipped and re-exported the better coins of their neighbors. Small county mints like Stolberg were both victims and participants. KM#28 falls squarely within those years, which explains both the proliferation of groschen types from minor rulers and the wildly inconsistent silver content found across surviving examples.
Wolfgang George ruled Stolberg-Stolberg during one of the most monetarily chaotic periods in German history — the Kipper- und Wipperzeit, a currency crisis of 1619–1623 in which dozens of small states debased their coinage aggressively, then clipped and re-exported the better coins of their neighbors. Small county mints like Stolberg were both victims and participants. KM#28 falls squarely within those years, which explains both the proliferation of groschen types from minor rulers and the wildly inconsistent silver content found across surviving examples.