Watch List notes:

Potosi, Bolivia, cob 8 reales, 1675E. S-P37b; KM-26; CT-350. 25.81 grams. Broad flan with minimal surface corrosion but strange gray hue and texture, full pillars-and-waves and cross, two dates, three mintmarks. Recovered from: Association, sunk in 1707 off the Scilly Isles, southwest of England

Estimate: $200