1 Peso

The Junta de la Administración de la Casa de Moneda was the monetary authority operating out of the Buenos Aires mint during the Rosas era — a period when the province's paper currency had been inconvertible since 1826 and showed no realistic prospect of returning to specie backing. These notes circulated in an economy where depreciation was chronic and public trust in paper essentially nonexistent, yet the system persisted because there was no viable alternative.

Locally printed rather than contracted abroad, which was unusual for the region at the time. Most contemporary South American issues relied on European presses; Buenos Aires went its own way.