Watch List notes:

Potosi, Bolivia, cob 1 real, (1649) O/Z, undotted O, very rare, ex-Mastalir (Plate Coin). S-P35; KM-12b; Cal-unl. 2.67 grams. Nice VF piece with bold but off-center shield. Pedigreed to the Robert Mastalir Collection and plated on page 245 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: $100 - $150