50 Centavos El Estado de Sonora

Sonora's 1915 emergency currency was a direct consequence of the revolutionary government's near-total exclusion from the federal monetary system. With Carrancista forces controlling the state and Mexico City's banking infrastructure either collapsed or hostile, Sonora issued its own fractional notes rather than accept the competing scrip flooding in from other revolutionary factions. The American Bank Note Company contract reflects just how much credibility the state government was deliberately signaling — ABNCo work was internationally recognized, and the choice was a calculated political statement about legitimacy.

The S1070 series is prone to foxing along the edges due to storage conditions common in the Sonoran climate, worth noting when assessing survivors.