Watch List notes:

Potosi, Bolivia, cob 1 real, 1652E post-transitional, 1-PH-6 at top. S-P37a; KM-13; CT-1052. 2.05 grams. Small flan (due to corrosion) with full and well-detailed pillars-and-waves and cross, low contrast. Recovered from: Consolacion, sunk in 1681 off Isla Santa Clara, Ecuador

Estimate: $100