Watch List notes:

Potosi, Bolivia, cob 2 reales, Philip III, assayer M, Grade 1. S-P18; KM-8. 6.38 grams. Full P-M, good full shield with bold denomination o-z, full but weaker cross, minimal surface corrosion. With Fisher tag and certificate #151276. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $700-1000