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1 Onza Pattern, Antigua Casa De Moneda De Mexico - Prensa De Correa
| Issuer | Casa de Moneda de México |
|---|---|
| Year | 1978 |
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| Currency | Peso (1863-1992) |
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| Obverse description | Central device depicts a historic screw press (prensa de correa) used at the old Mexican Mint, rendered in high relief against a deeply mirrored proof field. The press is shown in three-quarter perspective, featuring its characteristic long horizontal lever arm, central screw spindle, and robust base assembly. The circumferential legend ANTIGUA CASA DE MONEDA DE MÉXICO arcs around the upper field, while the engraver's mark ABEURP appears in the lower exergue. The design is framed by a toothed or dentilated inner border. |
|---|---|
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| Mintage | 1978 Mº - With 'PRUEBA'. Proof - 1978 Mº - Without 'PRUEBA'. Proof - |
| Additional information |
The "Antigua Casa de Moneda" series of pattern pieces was produced in 1978 as part of an internal project by the Mexican Mint to document and demonstrate its own historical production equipment — the Prensa de Correa being a belt-driven screw press type associated with colonial-era minting technology. These are not proposals for circulating coinage but commemorative strikes made on mint premises to showcase the machinery itself, placing them in an unusual category: patterns that reference equipment rather than a proposed design or denomination.
Both KM#Pn212 and Pn213 designations suggest at least two distinct strikings or metal variants documented under this press attribution. Surviving examples are institutionally scarce by intent.