100 000 Mark Steinkohlenbergwerk Gewerkschaft Neumühl

Neumühl was one of the major collieries in the Hamborn district of the Ruhr, a region that was under French and Belgian military occupation from January 1923 onward. German workers' passive resistance campaign — supported by the Reich government — brought much of Ruhr industry to a standstill, and the resulting disruption to wages created an immediate practical need for locally issued emergency currency. Mining operations of this scale employed thousands, and payroll in a hyperinflationary environment required notes that could be turned around faster than the Reichsbank could supply them.

Notgeld from colliery issuers tends to be less romanticized than the decorative municipal issues, which has kept collector demand — and therefore survival rates — uneven.