20 Pesos Bolivianos

Banco Oxandaburu y Garbino was a private commercial bank operating out of Gualeguaychú, in Entre Ríos province, at a time when Argentina had no central bank and provincial and private institutions issued their own currency more or less freely. The note is denominated in pesos bolivianos — the Bolivian peso fuerte that circulated widely across the Río de la Plata region as a de facto trade currency, particularly in interior commerce where locally issued paper needed a hard-money anchor to command any trust.

Gualeguaychú-printed private bank paper from this period is genuinely uncommon in any form. The bank's lifespan was short, and redemption or destruction of notes at closure was the norm rather than the exception.