Mexico
Estados Unidos brass Specimen Uniface Obverse Pattern Peso 1979-(Mo) SP65 PCGS, Mexico City mint, KM-Unl., PL-145A (RRR). Without mintmark. By Ricardo Luna Vasco. Tied for the second finest of just 6 examples of this uniface Pattern currently certified by PCGS, with apparently none having come to auction in at least the last two decades.
Privately Purchased from the Family of the Engraver in 2018
https://coins.ha.com/itm/mexico/mexico-estados-unidos-brass-specimen-uniface-obverse-pattern-peso-1979-mo-sp65-pcgs-/a/3098-34204.s?type=DA-DMC-CoinArchives-WorldCoins-3098-01182022
HID02906262019
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Estimate: 640-960 USD