Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip III, assayer T, castles rotated 90 degrees counterclockwise (rare), Grade-1 quality but Grade 2 on certificate. S-P21; KM-10. 24.04 grams. Tiny mintmark (probably a 2R punch), 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), solid and lightly toned, corrosion on part of edge only. With Fisher certificate #145871. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $600 - 900