100 Pesos Oro

The "Pesos Oro" denomination was Colombia's standard monetary unit from 1931, when the country abandoned the gold standard during the Depression-era crisis — the name persisted long after any gold convertibility had become theoretical. American Bank Note Company held the Colombian contract through much of the mid-twentieth century, and the consistency of their intaglio work made counterfeiting genuinely difficult in an era when most Latin American forgeries targeted the cruder locally-printed issues.

The Arias Robledo / Villaveces signature pairing appears across all documented dates within this pick number, suggesting no management change at the Banco de la República disturbed the series during its run.