Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip II, assayer A/A/B (rare), Grade 1, Research Collection Plate Coin #116. S-P11; KM-4.2 ;CT-345. 13.41 grams. Superb and intricately detailed full shield and cross-lions-castles, full P-A with clear over-assayer A/A/B (not noted in the Research Collection description), minimal corrosion, attractively toned around details. Pedigreed to the Atocha Research Collection, with copy of McKinney/Christie's catalog and Fisher photo-certificate #237396, also with Duncan Mathewson appraisal that gives the Grade. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $1500 - 2250