Watch List notes:

Potosi, Bolivia, cob 1 real, (1649) O/Z, undotted O, very rare, ex-Mastalir (Plate). S-P35; KM-12b; Cal-unl. 3.28 grams. Choice coin from this wreck with partial shield, cross, and date, clear over-assayer 0/Z (rare thus), slate gray surfaces with practically no corrosion. Pedigreed to the Robert Mastalir Collection and plated on page 244 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), with ROBCAR photo-certificate M100391. Recovered from: Consolacion, sunk in 1681 off Santa Clara Island, Ecuador.

Estimate: $150 - $225