Watch List notes:

Potosi, Bolivia, cob 8 reales, 1651E, modern 5, with crown-alone countermark on shield. S-P36; KM-19b; CT-511. 25.03 grams. Very bold countermark, full but weak shield and cross, uneven toning, minimal corrosion. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $350-500