Watch List notes:

Potosi, Bolivia, cob 8 reales, (16)50O, early-style date, with two countermarks on cross (rare): crowned-O and crown-alone (rare style). S-P35; KM-19b; CT-509. 24.53 grams. Oval flan with bold countermarks on full cross, clear date, full shield and crown with corrosion on edge, lightly toned. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0559. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($700-1000)