Watch List notes:

Potosi, Bolivia, cob 2 reales, 1617M, Grade-1 quality but no Grade on certificate. S-P19; KM-8; CT-356. 6.50 grams. Deeply toned and corrosion-free, with choice full shield, good full cross with bold 6 and 7 of date. With Fisher certificate #144510. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $500 - 750