50 Centavos Estado Libre y Soberano de Mexico

The "Estado Libre y Soberano" issues of 1915 emerged from the near-total collapse of centralized monetary authority during the Mexican Revolution. With Constitutionalist and Conventionist factions each printing their own competing currency, individual states stepped in to fill the vacuum — Guerrero, Oaxaca, and others produced emergency fractional notes that were often rejected outright by merchants in neighboring territories.

The S-prefix in the Pick reference signals this is catalogued among the Mexican revolutionary state issues, a notoriously complex group where forgeries and contemporary counterfeits both circulated freely alongside genuine examples.