1 Entero Herrera de los Navarros

Herrera de los Navarros is a small municipality in Zaragoza province, Aragon — territory that saw intense anarcho-syndicalist collectivization during the Spanish Civil War. Local collectives across Republican-held Aragon issued their own scrip in 1936–37 when metallic coinage vanished from circulation almost entirely, hoarded or melted. The "entero" denomination is specific to a handful of Aragonese collectives and functioned as a unit of internal exchange within the collectivity, not legal tender beyond it.

The Garicano-Montenegro catalog reference is incomplete, suggesting this piece was either documented late or survives in very few known examples — not unusual for village-level emissions that were redeemed locally and then discarded or destroyed after the collective disbanded.