Watch List notes:

Mexico City, Mexico, cob 2 reales, Philip IV, assayer P. S-M19; KM-33. 5.03 grams. Bold mintmark, nearly full shield and cross, light corrosion, patchy brown toning. With Marex tag #91-2R-0627. Maravillas, sunk in 1656 off Grand Bahama Island

Estimate: $150-225