Brazil
Maria I gold 6400 Reis 1794-R MS61 NGC, Rio de Janeiro mint, KM226.1.
From the Dresden Collection
https://coins.ha.com/itm/brazil/brazil-maria-i-gold-6400-reis-1794-r-ms61-ngc-/a/3076-33402.s?type=CoinArchives3076
HID02906262019
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Estimate: 600-700 USD