25 Centavos El Estado de Sonora

Sonora's state government issued this note under the authority of Governor José María Maytorena during the revolutionary period, when the collapse of federal monetary infrastructure forced individual Mexican states to print their own emergency currency. Sonora was among the better-resourced issuers precisely because of its cross-border relationship with Arizona — American commercial confidence in the state translated directly into a contract with ABNC, an unusually high-quality printer for a regional emergency issue.

The choice of American Bank Note Company gave Sonoran currency a credibility that most revolutionary-era Mexican paper lacked entirely. Counterfeit pressure was still a serious problem nonetheless, as competing factions printed rival scrip throughout the north.