Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip III, assayer not visible, 10 points (Grade 3), hand-signed certificate from 1976. KM-9. 7.02 grams. Thin from heavy corrosion, yet with clear shield and cross, encrustation in crevices (not fully cleaned), desirable pre-"Mother Lode" find. With original hand-signed Fisher certificate #2737 from 1976 (Cape Coral Bank). Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $300-450