Brazil
João V gold 6400 Reis 1744-R UNC Details (Saltwater Damage) NGC, Rio de Janeiro mint, KM149, LMB-219. Exhibiting a speckled surface texturing due to time spent underwater, along with a single scratch across João's hair.
https://coins.ha.com/itm/brazil/brazil-joao-v-gold-6400-reis-1744-r-unc-details-saltwater-damage-ngc-/a/3091-30239.s?type=CoinArchives3091
HID02906262019
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Estimate: 800-1000 USD