Watch List notes:

Potosi, Bolivia, cob 8 reales, 1649 O/sR (rare), with crowned-dot-F-dot (two dots) countermark on shield, ex-Mastalir (Plate). S-P35; KM-19b; Cal-unl. 21.37 grams. Broad flan (slightly thin from corrosive wear) with good full shield bearing a nearly full countermark, full and clear O/sR, full but off-center cross with tail of 9 of date visible, richly toned all over. (See lot 205 for explanation of this over-assayer.) Pedigreed to the Robert Mastalir Collection and plated on page 43 of Part A and page 331 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), with original (generic) Herman Moro certificate.Recovered from: Capitana, sunk in 1654 off Chanduy, Ecuador.

Estimate: $350 - $500