50 Céntimos Mateo de las Fuentes

Mateo de las Fuentes is a small municipality in Cuenca province, Castile–La Mancha. Like hundreds of other Republican-held towns during the Civil War, it issued its own emergency fractional currency in 1937 when the Nationalist blockade and wartime hoarding stripped everyday silver and copper coinage from circulation almost entirely. These municipally-issued vales and cartones were strictly local — accepted at the town's own shops and services, worthless the moment you crossed into the next village.

The Gari Monserrat catalog (the standard reference for Spanish Civil War local issues) classifies this as 902-B, implying at least one earlier variant exists for this denomination from the same issuer.