Watch List notes:

Potosi, Bolivia, cob 8 reales, (1)621(T), quadrants of cross transposed, Grade 3. S-P21; KM-10. 21.77 grams. Clear date and upper-left quadrant of cross (lion) but rest of coin heavily corroded (still solid). With Fisher photo-certificate #116689. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $300 - 450