50 Céntimos Petrel

Petrel is a small inland town in the Alicante province, and like hundreds of Spanish municipalities during the Civil War, its local council was forced into issuing fractional currency after metallic coin effectively vanished from circulation — hoarded, melted, or simply absent. The Republican government's inability to supply small change pushed this burden down to the ayuntamiento level, producing an enormous range of locally-printed emergency issues across the loyalist zone in 1937.

Industrias Gráficas Ortín operated out of nearby Elda, a few kilometers away, and printed several of these local emergency notes for towns in the comarca. The Gari Mon reference 1107-B suggests at least one variant exists within the Petrel 50 Céntimos series — likely differing in stamp color or signature combination.