Potosi, Bolivia, cob 2 reales, Philip III, assayer M, Grade 1. S-P18; KM-8. 6.54 grams. Solid but odd-shaped flan with choice full shield and cross, no corrosion, silvery sheen. With Fisher certificate #217274. Recovered from: Atocha, sunk in 1622 west of Key West, Florida
($500-750)