Mexico
Republic 8 Reales 1828 Pi-JS AU55 PCGS, San Luis Potosi mint, KM377.12, DP-Pi03. Rated as "the most difficult date of the 1828-1839 period" by Dunnigan and Parker, seen here with just the slightest weakness at the centers and splendid coloration.
https://coins.ha.com/itm/mexico/mexico-republic-8-reales-1828-pi-js-au55-pcgs-/a/3082-34487.s?type=CoinArchives3082
HID02906262019
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Estimate: 500-700 USD