Cómo identificar
- Year 1985 or 1986 on the obverse or reverse.
- Mexico 86 World Cup logo (FIFA + Mexico) on the reverse.
- Denomination in old pesos: 25, 50, 100 or 500.
- 0.720 fineness mark and Mo (Mexican Mint).
- Designs: Pique, soccer balls, players, the Azteca Stadium, pre-Hispanic motifs.