Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer Q, Grade 4. S-P17; KM-9; Cal-770. 8.70 grams. Some shield detail plus clear assayer Q (not mentioned on tag or certificate), silvery corroded surfaces. With original Fisher tag and certificate 86A-137300, pedigreed to the J.P. Silberman Estate. Recovered from: Atocha, sunk in 1622 west of Key West, Florida.

Estimate: $200 - $300