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10 Pesos Pattern, Coyolxauhqui, Copper-Nickel
| Issuer | Mexican Mint (Casa de Moneda de México) |
|---|---|
| Year | 1980 |
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| Composition | Log in to see details |
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| Orientation | Coin alignment ↑↓ |
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| Obverse description | The Mexican national coat of arms occupies the central field, depicting a Mexican golden eagle perched upon a prickly pear cactus and devouring a serpent, rendered in bold relief with finely engraved feather detail. Flanking the cactus at the base are laurel and oak branches tied with a ribbon. The circular legend ESTADOS UNIDOS MEXICANOS arcs along the upper periphery in incuse Latin lettering. |
|---|---|
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| Obverse lettering | ESTADOS UNIDOS MEXICANOS (Translation: United Mexican States) |
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| Additional information |
This is a pattern piece — never approved for circulation — produced in the wake of one of the most significant archaeological discoveries in modern Mexican history. In February 1978, electrical workers digging beneath downtown Mexico City struck a massive carved stone disk depicting the dismembered moon goddess Coyolxauhqui, directly adjacent to the buried Templo Mayor complex. The find triggered an emergency excavation that reshaped understanding of the Aztec capital Tenochtitlan and generated immediate pressure to commemorate the discovery on circulating coinage.
The copper-nickel composition was ultimately rejected in favor of stainless steel for the issued 10 Peso series. KM#Pn220 represents the rejected alloy trial.