Brazil
João V gold 6400 Reis 1750-R AU55 NGC, Rio de Janeiro mint, KM149, LMB-225. The final date in the series, stretching from 1731 to 1750. Lightly struck in areas, though lustrous nonetheless, and clearly close to Mint State in preservation.
https://coins.ha.com/itm/brazil/brazil-joao-v-gold-6400-reis-1750-r-au55-ngc-/a/3091-30246.s?type=CoinArchives3091
HID02906262019
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Estimate: 800-1000 USD