Watch List notes:

Potosi, Bolivia, cob 8 reales, (1)651(O or E), with crown-alone (rare style) countermark on cross. KM-19b. 20.51 grams. Full countermark that looks like a jester's cap (like Ullian Type E but with three dots above), bold date, otherwise mostly corroded, unevenly toned. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0903. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($500-750)