Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer T, Grade 2. S-P21; KM-9. 12.98 grams. Solid, non-round flan, uncorroded, with bold full shield and cross (the latter slightly doubled), silvery. With Fisher tag and certificate #206404. Recovered from: Atocha, sunk in 1622 west of Key West, Florida
(500 - 750 USD)