Watch List notes:

Potosi, Bolivia, cob 4 reales, 1649 O/Z, with crowned-dot-F-dot (four dots) countermark on shield (very rare), ex-Harley, ex-Mastalir (Plate). S-P35; KM-17b; Cal-unl. 8.52 grams. Corroded and thin but with enough of the countermark to recognize it, also with full P-O/Z and tail of 9 of date, making it one of only three known with this combination, toned all over. Pedigreed to the Alan Harley Collection (Baldwin auction of September 2011, with original lot-card 1855 and collector's tag) and to the Robert Mastalir Collection and plated on page 67 of Part A and page 356 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: Maravillas, sunk in 1656 off Grand Bahama Island.

Estimate: $350 - $500