50 Céntimos Peñalba

Peñalba is a small municipality in Huesca, Aragon, and like hundreds of Spanish towns during the Civil War, it was forced to print its own fractional currency when Republican-zone coinage disappeared almost entirely from circulation in 1936–37. These hyper-local emissions — issued by municipal councils with no central oversight — varied wildly in print quality and surviving quantities, and many were produced in tiny runs that served a single village economy for only a few months before the broader Republican suplidos system attempted to rationalize things.

The square format is unusual enough to be worth noting. Most Spanish guerra civil locals were rectangular.