Watch List notes:

Potosi, Bolivia, cob 8 reales, (1)621T, quadrants of cross transposed, Grade 1, with tag only (certificate missing). S-P21; KM-10. 26.01 grams. Small, thick flan with good full shield and full but centrally weak cross (both slightly doubled), bottom of 62 of date bold, nicely toned, no corrosion. With Fisher tag #159890. Atocha, sunk in 1622 west of Key West, Florida

Estimate: $400-600