10 Pfennig - Augsburg Stadtbachspinnerei

Augsburg's Stadtbachspinnerei was a textile spinning operation drawing power from the Stadtbach, the city's medieval canal network. Like hundreds of German industrial firms during World War I, it issued iron notgeld when the imperial government's wartime metal requisitions stripped everyday small change from circulation almost overnight. Iron was itself a propaganda choice — the "Eiserne Zeit," or Iron Age, was a deliberate rhetorical framing of wartime sacrifice promoted by Berlin.

The Hasselmann and Mennichen references confirm this as a documented factory issue, not a speculative piece.