Ingolstadt issued zinc notgeld during the acute metal shortages of World War I, when copper and nickel were diverted wholesale to the war economy. Municipal and private issuers across Germany filled the resulting coinage vacuum with locally produced pieces, zinc being one of the few metals still available for civilian use. The "G.G.F." designation identifies the specific issuing body within the city — likely a cooperative or commercial federation — rather than the municipal government itself.
Ingolstadt issued zinc notgeld during the acute metal shortages of World War I, when copper and nickel were diverted wholesale to the war economy. Municipal and private issuers across Germany filled the resulting coinage vacuum with locally produced pieces, zinc being one of the few metals still available for civilian use. The "G.G.F." designation identifies the specific issuing body within the city — likely a cooperative or commercial federation — rather than the municipal government itself.