Brazil
João V gold 6400 Reis 1750-R AU53 NGC, Rio de Janeiro mint, KM149. Subdued luster evident in the fields.
From the Allen Moretti Swiss Collection
https://coins.ha.com/itm/brazil/brazil-joao-v-gold-6400-reis-1750-r-au53-ngc-/a/3076-31078.s?type=CoinArchives3076
HID02906262019
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Estimate: 1000-1200 USD