5 Pesos Plata Boliviana

The Banco del Río de La Plata was an Argentine private bank operating under concession during the brief window of provincial banking expansion before the Banco Nacional absorbed much of the sector. The "Plata Boliviana" denomination is the telling detail here — Bolivia and Argentina shared overlapping silver coinage circulation in the 1860s, and the boliviano peso was still common tender in the northern Argentine provinces. Issuing notes denominated in that unit was a practical acknowledgment of what actually passed hand to hand in the region, not a political statement.

PS references in this series are sparsely documented, and surviving examples are rare enough that auction appearances tend to generate catalogue revisions.