1820-B NGC AU Brazil 960 Reis Overstruck Mexico 8 Reales 1809 BARS Mint Error Coin (24102302D)Almost Uncirculated Brazil silver 960 Reis 1820 coin. Minted at the Bahia mint (mint mark B) & overstruck over a Ferdinand VII Mexico 1809 Spanish Colonial 8 reales coin. Scarce obverse legend Mint Error variety with BRAS engraved as BARS. Rare example where the Mexico 8 reales undertype date, denomination and assayer's initials are visible. Date: 1809 visible obverse approx. 8: 00 to 9: 00. Denomination 8R and Mexico City Assayer's Initials TH