Watch List notes:

Mexico City, Mexico, cob 4 reales, Philip IV, assayer P.S-M19; KM-38.12.57 grams.Struck on a broad and cup-shaped flan with most of shield and cross detail plus denomination 4 visible, very light seawater effect, darkish toning.From: Concepcion, sunk in 1641 off Hispaniola
($150-225)