500 Pesos Oro

Colombia's central bank has operated its own intaglio printing facility in Bogotá since 1959, one of relatively few Latin American nations to produce its notes entirely in-house during this period rather than contracting out to Thomas De La Rue or the American Bank Note Company. The P#431 series is a product of that facility, pressed entirely on domestic equipment through a production run spanning four issue years.

The "Pesos Oro" denomination label was a technical holdover — Colombian currency had not been tied to a gold standard since the 1930s, but the designation persisted on banknotes until the 1993 redenomination collapsed "Oro" from the official name entirely.