Watch List notes:

Potosi, Bolivia, cob 4 reales, 1620T, Grade 2. S-P21; KM-9; Cal-778. 12.87 grams. Bold bottom half of date outside full cross, full shield with bold denomination o-iiii, light surface corrosion, nicely toned. With Fisher tag and certificate #164550 (date not mentioned).Recovered from: Atocha, sunk in 1622 west of Key West, Florida
($600-$900)