4 Reales Plata Boliviana

Banco Solanas y Cía. was one of the short-lived private banks operating in Bolivia during the brief free-banking period of the 1870s, before the government moved to consolidate and restrict note-issuing privileges. These provincial private emissions were rarely trusted far beyond their immediate locality, and redemption in silver — the plata boliviana the denomination explicitly promised — was never guaranteed in practice.

The PS prefix in the Pick catalog places this firmly in the Specialized volume's South American private bank section. Survivors are rare; most notes from Bolivian private issuers of this period were either redeemed and destroyed or simply abandoned when the issuing house folded.