1 Peso

The Banco y Casa de Moneda de Buenos Ayres was the successor institution to the Banco de la Provincia de Buenos Aires's earlier monetary operations, functioning during a period when the Argentine Confederation and the State of Buenos Aires had only recently reunified — a fragile political settlement reached in 1861. Provincial banks continued issuing their own notes well into the 1860s before any meaningful federal monetary integration took hold.

PS catalogue prefixes indicate South American state and provincial bank issues outside the mainstream national series. This note falls squarely in that category — a provincial instrument predating centralized Argentine currency control by nearly two decades.