BRAZIL. 6400 Reis (Peca), 1797-R. Rio de Janeiro Mint. Maria I. NGC MS-62.
Fr-87; KM-226.1. Emanating from the antepenultimate year in the reign of Maria "the Mad," this nearly-Choice example presents seemingly as much radiant luster as the day on which it departed from the Rio mint.
Estimate: $1000 - $1500