1 Peso

Colombia's 1871 coinage reform replaced the old "Granadino" system with a decimal structure tied to the French metric system, aligning the country with the Latin Monetary Union's weight and fineness standards without formally joining it. The 1 Peso gold piece was the smallest denomination in that reformed gold series. Production was split across the Bogotá and Medellín mints during this period, with Medellín — then still marked "M" — handling significant output due to proximity to Antioquia's gold fields.

Hernández distinguishes four varieties across the emission years, primarily by mint mark and minor die differences.