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20-centavo coin

Design features

Type C
Diameter 19.5 mm (circle around a dodecagon)
Shape 12-sided
Weight 3.04 grams
Edge Plain
Front In the center, the National Shield in sculpted relief, with the inscription “ESTADOS UNIDOS MEXICANOS” (UNITED MEXICAN STATES) forming a semicircle above it.
Back In the middle part of the coin, the number ten “20” as the key motif and denoting face value; to its right the cent symbol “¢”; top center, the mint year; bottom center, the Mexican mint mark “M”; to the left, parallel to 12-sided frame, a stylized image of the “Thirteenth Acatl Day of the Sun Stone.”

Composition

Bronze-aluminum alloy comprised of the following materials:

  • 92% (ninety-two percent) copper;
  • 6% (six percent) aluminium; and
  • 2% (two percent) nickel.

Design features

Type D
Diameter 15.3 mm
Shape Round
Weight 2.258 grams
Edge Segmented reeding
Front In the center, the National Shield in sculpted relief, with the inscription “ESTADOS UNIDOS MEXICANOS” (UNITED MEXICAN STATES) forming a semicircle above it.
Back In the middle part of the coin, the number ten “20” as the key motif and denoting face value; to its right the cent symbol “¢”; top center, the mint year; bottom center, the Mexican mint mark “M”; to the left, parallel to the edge, a stylized image of the “Thirteenth Acatl Day of the Sun Stone.”

Composition

Stainless steel alloy comprised of the following materials:

  • Between 16% and 18% (sixteen and eighteen percent) chrome;
  • 0.75% (seventy-five basis points) nickel, maximum;
  • 0.12% (twelve basis points) carbon, maximum;
  • 1% (one percent) silicon, maximum;
  • 1% (one percent) manganese, maximum;
  • 0.03% (three basis points) sulfur, maximum;
  • 0.04% (four basis points) phosphorus, maximum; and
  • The remainder, iron.