50 Céntimos Urrea de Gaén

Urrea de Gaén is a small Aragonese municipality that, like hundreds of other Republican-held towns during the Civil War, issued its own fractional paper currency after the collapse of metallic coin circulation in 1936–37. The hoarding of silver and copper left local economies functionally paralyzed, and municipal councils — many operating under anarcho-syndicalist influence — printed or rubber-stamped whatever they could to keep commerce moving. These emergency emissions were never formally sanctioned by the Republican treasury and had no validity outside the issuing locality.

The official stamp is the only security measure, which was common for Aragonese village issues of this period. The Garicano-Monoya reference confirms this as a documented emission, though surviving examples remain scarce given the destruction of 1938 when Nationalist forces retook the Ebro region.