20 Pesos Gobierno Constitucionalista de Mexico

The Constitutionalist government under Venustiano Carranza began issuing its own currency from Monclova shortly after seizing control of Coahuila in early 1913, following Huerta's coup against Madero. These notes were essentially war financing instruments — printed quickly to pay troops and suppliers before the Constitutionalists had any stable revenue base or formal banking infrastructure.

The S629 series is among the earliest Carrancista emissions, predating the more organized infalsificable issues of 1914. Counterfeiting was a genuine operational problem almost immediately, and multiple Constitutionalist factions issued notes with overlapping designs and numbering, making authentication of surviving examples genuinely complicated.