Watch List notes:

Mexico City, Mexico, cob 1 real, Philip II, assayer O below mintmark oM to left, Grade 2. S-M11; KM-26; CT-645. 2.74 grams. Typically broad, round and thin, with full and well-detailed shield and cross, but also typically shiny and lightly corroded, very scarce shipwreck denomination and especially desirable as from the Atocha. With Fisher photo-certificate #95A-0854. Recovered from: Atocha, sunk in 1622 west of Key West, Florida (Estimate: $700 - 1000)