1 Real Plata Boliviana

The Banco de Londres y Río de la Plata was a British joint-stock bank operating in Argentina — not an Argentine institution in any meaningful sense. Its Rosario branch served the booming wool and cereal trade moving through the Paraná river corridor, and small-denomination notes like this one were issued to fill the chronic shortage of fractional currency that plagued the interior provinces throughout the 1860s.

PS1731 is among the earliest documented emissions from the Rosario office and survives in very few examples. The "Plata Boliviana" denomination indicates value expressed in Bolivian silver pesos, the de facto trade currency of the Argentine interior at the time — a reminder of how fragmented and informal the monetary system of the region remained a full half-century after independence.