Watch List notes:

Potosi, Bolivia, cob 2 reales, Philip III, assayer M, Grade 2. S-P18; KM-8; Cal-628. 6.39 grams. Bold full P-M to left of well-detailed full shield, nearly full but off-center cross, light corrosion, patchy toning. With Fisher tag and photo-certificate 297 from 1982. From: Santa Margarita, sunk in 1622 west of Key West, Florida
($800-1200)