Brazil
João Prince Regent gold "Special Series" 4000 Reis 1816-(R) AU Details (Harshly Cleaned) NGC, Rio de Janeiro mint, KM312, LMB-578. Boasts traces of deep honeyed patination to the recesses despite the noted cleaning. A popular one-year type featuring João's full title in Latin on the reverse.
https://coins.ha.com/itm/brazil/brazil-joao-prince-regent-gold-special-series-4000-reis-1816-r-au-details-harshly-cleaned-ngc-/a/3091-30364.s?type=CoinArchives3091
HID02906262019
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Estimate: 800-1200 USD