Potosi, Bolivia, cob 4 reales, Philip III, assayer R (curved leg), Grade 3. S-P15; KM-9; Cal-768. 10.34 grams. Clear shield and cross despite moderate to heavy pitting, nicely toned. With Fisher tag and photo-certificate #140526.Recovered from: Atocha, sunk in 1622 west of Key West, Florida
($300-$450)