1.000 Pesos

The Banco de Buenos Ayres was established in 1822 as Argentina's first formal bank of issue, initially backed by a land mortgage scheme rather than specie reserves. By the time notes in this range were dated, the bank was already under severe strain — the prolonged war with Brazil over what became Uruguay had drained public finances, and convertibility had been suspended in 1826, a suspension that would not meaningfully end for decades.

The PS prefix in the Pick catalog signals this as a private or semi-official issue rather than a government emission, though in practice the distinction was thin: the bank operated under provincial charter and its notes functioned as the primary circulating medium in Buenos Aires. Survival rate for issues of this period is low.