1 Peso Plata Boliviana

Banco Argentino operated out of Concordia, Entre Ríos — a provincial banking environment that flourished briefly during the 1860s under Argentina's fragmented pre-national banking system, before the 1875-era reforms gradually centralized monetary authority. The denomination itself is telling: peso plata boliviana was a unit of account tied to the Bolivian silver peso, widely used in the Argentine interior and Mesopotamia region during this period when no single national currency held firm authority.

The ABNC plate work from this era is typically first-rate, but what matters here is the issuer's brevity — Banco Argentino of Concordia had a short operational window, which makes surviving notes genuinely uncommon rather than merely old.