50 Pesos Oro

Colombia's Banco de la República was only a few years old when this note entered circulation — the central bank had been established in 1923 as part of the Kemmerer Mission reforms, a sweeping financial reorganization pushed through by American economist Edwin Kemmerer. The early series of high-denomination notes was almost inevitably placed with ABNC in New York, the dominant supplier to Latin American central banks throughout the interwar period.

The "Pesos Oro" designation was deliberate policy: it tied the currency explicitly to gold convertibility, a commitment Colombia maintained until the Depression forced its hand in 1931.