Watch List notes:

Potosi, Bolivia, cob 4 reales, (16)22T, quadrants of cross transposed, Grade 1. S-P21a; KM-17; CT-unl. 12.38 grams. Odd-shaped flan (possibly from edge-loss, but with minimal surface corrosion), nice full shield and cross, bold bottom half of 22 of date (desirable and scarce as the date of the wreck), lightly toned. Pedigreed to the Classics collection, with Fisher tag and certificate #158483. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $900-1350