Watch List notes:

Potosi, Bolivia, cob 4 reales, 1617M, Grade 1. S-P19; KM-9 ;CT-245. 11.63 grams. Bold full 16 and 7 of date, full P-dot-M, good full shield and cross (the former slightly doubled and the latter lightly corroded, as is part of the edge). With Fisher/Miguel photo-certificate #H-1961. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $600 - 900