Brazil
João Prince Regent gold 6400 Reis 1815/4-R MS62 NGC, Rio de Janeiro mint, KM236.1, cf. LMB-565 (unlisted overdate), Guimaraes-1815/14-1.1. A deeply-engraved piece bearing ample brilliance to the detailed motifs and standing as the sole finest piece graded by NGC.
Ex. Ponterio Auction 145 (April 2008, Lot 547) From the Petropolis Collection, Part III
https://coins.ha.com/itm/brazil/brazil-joao-prince-regent-gold-6400-reis-1815-4-r-ms62-ngc-/a/3105-30019.s?type=DA-DMC-CoinArchives-WorldCoins-3105-01092023
HID02906262019
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Estimate: 800-1200 USD