Watch List notes:

Potosi, Bolivia, cob 4 reales, (16)18T, Grade 1. S-P21; KM-9; CT-247. 13.18 grams. Choice full shield and cross, bold P-T and date, no corrosion. With Fisher certificate #153370. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $600 - 900