50 Pesos Oro

Colombia's Banco de la República began producing its own notes domestically in earnest from the late 1970s onward, having previously relied on foreign security printers. The Imprenta de Billetes — the bank's own printing plant in Bogotá — took on this series, and the results show the transition: quality is competent but uneven across the run, and paper consistency varies noticeably between 1984 and 1986 printings.

The sole security feature is a watermark, modest even by the standards of the period. Within two years of this series closing, Colombia had moved to significantly more sophisticated anti-counterfeiting measures driven by the narco-dollar inflation pressures of the late 1980s.