Brazil 1788 6400 Reis Rio de Janeiro Mint

Struck at the Rio de Janeiro Mint, this historic 1788-R Brazilian 6400 Reis—popularly known as a "Peça" or "Half Johanna"—presents a captivating window into colonial numismatics. The obverse showcases the elegant portrait of Queen Maria I wearing her traditional widow's veil, surrounded by the Latin legend acknowledging her rule over Portugal and the Algarves. The reverse displays the highly detailed, crowned royal coat of arms. Serving as a crucial driver of international commerce, this specimen offers exceptional historical appeal, boasting a radiant, deep golden-orange luster and strong technical details typical of this highly sought-after eighteenth-century South American trade coinage.