Brazil
Maria I gold 6400 Reis 1804-R MS62 NGC, Rio de Janeiro mint, KM226.1, LMB-O542. The penultimate issue for this type, and scarcer as a date, with the second lowest mintage (127,652 coins) of the series, behind only the following year's output that saw approximately 109,000 coins minted between the Maria and João as Prince Regent types.
HID02901242017
Estimate: 1300-1600 USD