Brazil
João VI 960 Reis 1820-R AU55 NGC, Rio de Janeiro mint, KM326.1, LMB-478. Struck over a Chilean "Volcano" Peso 1815 (cf. KM82.2). An always sought-after host for this 960 Reis type, and only the third example of this date-mint combination with this overstrike we have presented. Although much of the undercoin has been obliterated, much of the underlying legends remain visible, including the date.
https://coins.ha.com/itm/brazil/brazil-joao-vi-960-reis-1820-r-au55-ngc-/a/61216-99135.s?type=CoinArchives61216
HID02906262019
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Estimate: 150-200 USD