5 Céntimos Rodonyà; Sindicat Agrícola

One of hundreds of small-denomination emergency issues that flooded Catalonia and the Valencian region during the Civil War years, this note was produced by the Sindicat Agrícola de Rodonyà — an agricultural cooperative in a tiny municipality in the Alt Camp comarca of Tarragona province. With the Republic struggling to maintain coin supply after silver and copper hoarding stripped small change from everyday commerce, local bodies ranging from town councils to trade unions to farming cooperatives began printing their own fractional currency. The Sindicat's issues fall squarely into this emergency vales category, collectively catalogued under the Atles dels bitllets locals de Catalunya.

The perfectly square format is unusual enough to be worth noting.