Mexico
Estados Unidos silver Proof "Kukulcan Pyramid" 20 Pesos ND (2007)-Mo PR69 Ultra Cameo NGC, Mexico City mint, KM-Unl. Chichen Itza series. Inscribed with "070707" to commemorate July 7th 2007, the date when the Chichen Itza complex was named one of the New Seven Wonders of the World. Tied for the highest grade at NGC.
https://coins.ha.com/itm/mexico/mexico-estados-unidos-silver-proof-kukulcan-pyramid-20-pesos-nd-2007-mo-pr69-ultra-cameo-ngc-/a/61310-24452.s?type=DA-DMC-CoinArchives-WorldCoins-61310-05072023
HID02906262019
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