500 Pesos

The Junta de la Administración de la Casa de Moneda was Buenos Aires's provincial monetary authority — not a national central bank — operating under the Confederation period's fragmented financial arrangements. This 500 Pesos note was issued at a time when Buenos Aires had separated itself from the Argentine Confederation following the 1850–51 political rupture, maintaining its own customs revenues and monetary emissions independent of Urquiza's interior provinces.

The PS prefix in the Pick catalogue denotes a privately-issued or state-chartered institution outside the national banking framework — appropriate classification here, since Buenos Aires provincial emissions of this period have no federal standing whatsoever.

High-denomination notes from this issuer in 1851 are genuinely uncommon; most surviving examples show heavy use consistent with commercial circulation in the port trade.