Watch List notes:

Potosi, Bolivia, cob 8 reales, (1650-1)O, with two countermarks (rare): crown alone (common variety) on shield and arms on cross. S-P35; KM-19b. 25.36 grams. Not much corrosion (edge only) but somewhat weak strike, still with full shield and cross and bold countermarks, toned fields. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0271. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($350-500)