Brazil
João VI 160 Reis 1820/10-R AU55 NGC, Rio de Janeiro mint, cf. KM323.1 (Rare), LMB-467 (overdate unlisted). A fleeting issue produced to a total mintage numbering only 1,458 examples. Lustrous and only lightly circulated, resulting in a sharp visual appeal for this conditionally challenging date. Currently the finest example certified by NGC.
https://coins.ha.com/itm/brazil/brazil-joao-vi-160-reis-1820-10-r-au55-ngc-/a/3091-30076.s?type=CoinArchives3091
HID02906262019
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Estimate: 500-1000 USD