Watch List notes:

Potosi, Bolivia, cob 1 real, (1649) O, dotted O, rare, ex-Mastalir (Plate). S-P35; KM-12b; Cal-743. 3.18 grams. VF with most of shield and cross showing quite boldly, partial date, clear mintmark and dotted-O assayer. Pedigreed to the Robert Mastalir Collection and plated on page 246 of Part A of his book The Great Transition at the Potosi Mint, 1649-1652: The 1649-1652 Crowned Shield Coinage and the Countermarks of 1652 (2021).

Estimate: $125 - $200