Watch List notes:

Potosi, Bolivia, cob 8 reales, 1649 O, rotated 4 in date, with crowned-L countermark on cross, ex-Mastalir (Plate). S-P35; KM-19b; Cal-1487. 24.64 grams. Roundish flan with much legend and full shield and cross (minimal surface corrosion), lightly toned, with bold denomination 8, half of countermark, full but weak date (the rotated 4 barely visible). Pedigreed to the Robert Mastalir Collection and plated on page 61 of Part A and page 122 of Part B of his books The Great Transition at the Potosi Mint, 1649-1652: The 1649-1652 Crowned Shield Coinage and the Countermarks of 1652 (2021).Recovered from: Capitana, sunk in 1654 off Chanduy, Ecuador.

Estimate: $350 - $500