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Design features
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Type |
C |
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Diameter |
21.0 mm |
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Shape |
Round |
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Weight |
3.95 grams |
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Edge |
Plain |
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Front |
The National Shield with the inscription “ESTADOS UNIDOS MEXICANOS” (UNITED MEXICAN STATES) forming a semicircle above it. |
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Back |
In the center of the coin to the left, the symbol “$”, and to the right, the face value, one, “1”; top center, the mint year; to the right of the center, the Mexican mint mark “M.” As the key motif, a stylized image of the “Ring of Splendor of the Sun Stone”. |
Composition
Bimetallic coin comprised of two alloys, one in the center of the coin and the other in its periphery, as follows:
1. Center of the coin. Bronze-aluminum alloy.
- 92% (ninety-two percent) copper;
- 6% (six percent) aluminium; and
- 2% (two percent) nickel.
This composition weighs 1.81 grams.
2. Peripheral ring of the coin. Stainless steel alloy.
- 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.
This composition weighs 2.14 grams.
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