Potosi, Bolivia, cob 2 reales, Philip II, assayer B (3rd period), Grade 1 (Grade-2 quality). S-P10; KM-3.2; CT-509. 5.14 grams. Thin from corrosion but with good full cross and weak but full shield. With Fisher certificate #237317 (attributed to Lima). Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $500 - 750)