1 Peso Plata Boliviana

Banco de San Juan was one of several Argentine provincial banks operating under the loose monetary framework of the 1860s–70s, before the national government moved to consolidate banking authority. These institutions issued their own notes denominated in pesos plata boliviana — a unit tied to the Bolivian silver peso that circulated widely in the Cuyo region due to trade routes through the Andes rather than any formal monetary agreement.

Provincial bank notes from this period are scarce almost by design: most were redeemed and destroyed following the 1890s banking reforms. PS#1873 from San Juan represents a short-lived issuing authority whose full emission history remains poorly documented.