Potosi, Bolivia, cob 8 reales, 1649O, with two countermarks (rare) on cross: crowned-T (rare) and crowned-L. S-P35; KM-19b; CT-506. 20.12 grams. Good full cross with 100% full date and countermarks, shield side heavily corroded, lightly toned all over. From the Maravillas Research Collection of Countermarked Potosi Cobs, with Marex certificate and tag #0842. Recovered from: Maravillas, sunk in 1656 off Grand Bahama Island ($400-600)