½ Real Boliviano

The Banco Paraná was one of several provincial banks operating in Argentina during the brief and turbulent free-banking period of the 1860s, before the national government moved to consolidate monetary authority. That these institutions issued denominations denominated in Bolivianos rather than pesos reflects the currency chaos of the interior provinces, where Bolivian silver coinage was the dominant circulating medium and paper had to anchor itself to something people actually trusted.

A half-real denomination suggests this was intended for small retail transactions — low-value fractional paper rarely survived heavy use, and the Banco Paraná's issues were in circulation for only a few years before provincial bank charters were curtailed.