Mexico
Estados Unidos silver Proof Onza 1983-Mo PR68 Ultra Cameo NGC, Mexico City mint, KM494.1. Mintage: 998. Doubled Die Reverse. The key to the series and a sought after error, tinted by a touch of ecru tone.
https://coins.ha.com/itm/mexico/mexico-estados-unidos-silver-proof-onza-1983-mo-pr68-ultra-cameo-ngc-/a/61310-24497.s?type=DA-DMC-CoinArchives-WorldCoins-61310-05072023
HID02906262019
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