100 Pesos

Pick 66 covers a multi-year run across one of Mexico's more turbulent inflationary periods — the peso was losing ground steadily through the mid-1970s, and the 100-peso denomination, once substantial, had become workaday currency by the time this series closed. Banco de México had taken over its own printing operations by this point, and the results were competent but never as technically refined as earlier Talleres Gráficos or foreign-printed issues.

Worth noting: watermark-only security on a note of this face value was already considered thin for the period. Within a few years, the accelerating devaluation crisis would render the entire denomination effectively obsolete, leading to the broader peso reforms of the 1980s.