0.50 Pesetas Boltaña

Boltaña is a small town in the Aragonese Pyrenees, and like hundreds of Spanish municipalities during the Civil War, its council issued emergency fractional currency when Republican-zone coinage vanished almost entirely from circulation — hoarded, melted, or simply gone. These consejos municipales had no printing infrastructure, so most of what they produced was little more than a stamped chit authorized by whatever local officials happened to hold administrative power in 1937.

The two signatories, Enrique Payuelo and Martín Gazo, were almost certainly local councillors rather than banking functionaries. The official stamp serves as the note's only meaningful security, which tells you everything about the trust economics of wartime Aragon.