Watch List notes:

Potosi, Bolivia, cob 4 reales, (16)17(M), Grade 2. S-P19; KM-9; CT-245. 11.81 grams. Clear 7 of date, full but somewhat crude shield and cross due to flatness and light to moderate corrosion, typically silvery. With Fisher certificate #159512. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $400 - 600