Watch List notes:

Potosi, Bolivia, cob 8 reales, (16)20T, upper half of shield transposed, Grade 3. 17.26 grams. Bold 0 of date, full assayer, full shield with clear error, full but weaker cross, corroded all over. With Fisher certificate #145662. Recovered from: Atocha, sunk in 1622 west of Key West, Florida

Estimate: $300 - 450