Watch List notes:

Potosi, Bolivia, cob 2 reales, Philip III, assayer Q, Grade 2. S-P17; KM-8; CT-353. 4.49 grams. Dark and corroded but with most of shield and cross and clear assayer Q (note the weight on the certificate is erroneous). With Fisher tag and certificate #263680. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $400-600