Brazil
Maria I gold 6400 Reis 1788/7-R AU58 NGC, Rio de Janeiro mint, KM218.1. One of a mere 5 examples of this elusive overdate yet seen by NGC, and only the second we have offered since 2013, the underlying numeral 7 remaining quite clear.
From the Dresden Collection
https://coins.ha.com/itm/brazil/brazil-maria-i-gold-6400-reis-1788-7-r-au58-ngc-/a/3076-33400.s?type=CoinArchives3076
HID02906262019
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Estimate: 800-1000 USD