Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip III, assayer T, castles rotated 90 degrees counterclockwise (rare), Grade 2. S-P21; KM-10. 24.03 grams. Tiny mintmark (probably a 2R punch, also the flan rather small), choice full shield and cross, the latter with striking error (could be quadrants transposed with lions rotated 90 degrees clockwise, but no way to know without any legend visible), nicely toned, minimal surface corrosion with minor edge-loss. Pedigreed to the Classics collection, with Fisher sticker and certificate #145871 plus appraisal certificate. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $600-900