Watch List notes:

Mexico City, Mexico, cob 4 reales, Philip IV, assayer P. S-M19; KM-38. 11.48 grams. Decent piece with choice shield and cross, bold mintmark and assayer, tan toning all over with some green-blue encrustation. Recovered from: Concepcion, sunk in 1641 off Hispaniola
(100 - 150 USD)