Potosi, Bolivia, cob 8 reales, Philip III, assayer Q, Grade 1. S-P17; KM-10; CT-124. 23.51 grams. Bold P-Q, full shield, full but doubled cross, lightly corroded and typically silvery. With Fisher certificate #264363. Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $400 - 600)