Brazil
Maria I & Pedro III gold 6400 Reis 1778-R AU Details (Cleaned) NGC, Rio de Janeiro mint, KM199.2, LMB-460. A modestly circulated specimen with sharp details and only very light evidence of cleaning.
https://coins.ha.com/itm/brazil/brazil-maria-i-and-pedro-iii-gold-6400-reis-1778-r-au-details-cleaned-ngc-/a/3091-30313.s?type=CoinArchives3091
HID02906262019
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Estimate: 700-800 USD