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10 Pesos Pattern, Tuerca, Copper-Nickel
| Issuer | Casa de Moneda de México (Mexican Mint) |
|---|---|
| Year | 1974-1976 |
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| Value | Log in to see details |
| Currency | Peso (1863-1992) |
| Composition | Log in to see details |
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| Diameter | Log in to see details |
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| Obverse description | The Mexican national coat of arms is centrally displayed, depicting a Mexican golden eagle perched upon a prickly pear cactus rising from a rocky islet amid water, clasping a serpent in its beak and talons in the Aztec heraldic tradition. The device is encircled by a wreath of laurel and oak branches tied at the base with a ribbon. The legend ESTADOS UNIDOS MEXICANOS arcs along the upper periphery in raised Latin characters. The polygonal tuerca-style collar imparts a distinctive multi-sided profile to the rim, identifying this piece as part of the mid-1970s pattern series produced by the Casa de Moneda de México. |
|---|---|
| Obverse script | Log in to see details |
| Obverse lettering | Log in to see details |
| Reverse description | Log in to see details |
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| Reverse lettering | DIEZ PESOS M° 1974 |
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| Additional information |
In the early 1970s, Mexico was actively redesigning its circulating coinage in anticipation of inflation-driven denomination changes, and the Mint produced a series of pattern strikes — known colloquially as "tuercas" (nuts or bolts, a nickname derived from the reeded or segmented edge treatment tested on some pieces) — to evaluate new specifications before committing to production tooling. The 1974–1976 date range suggests this piece survived at least two budget cycles without advancing to circulation, not uncommon for Mexican pattern work of this period.
The dual PL references (44 and 44B) indicate at least one recognized die or specification variant within the type.