10 Pesos Plata Boliviana

El Banco Argentino operated out of Rosario — not Buenos Aires — during a period when Argentina's provincial banking system was genuinely fragmented, with dozens of private banks issuing their own notes under loose federal oversight. The denomination itself, pesos plata boliviana, reflects a regional monetary reality: Bolivian silver coinage circulated widely in the Río de la Plata interior during the 1860s, and denominating notes in that unit was a practical concession to what people actually trusted and used.

The American Bank Note Company's involvement here follows a familiar pattern for South American provincial issuers of this decade — ABNC was actively pursuing contracts across the continent, and Rosario's commercial banks were willing clients. Whether any of the PS1527 series survived in quantity is another matter; provincial Argentine private bank notes from this window are genuinely scarce, with many issues redeemed or simply lost after the banking reforms of the 1870s tightened control over private emission.