Watch List notes:

Mexico City, Mexico, cob 4 reales, Philip IV, assayer D. 13.65 grams. Broad flan with nice full shield and cross, bold assayer (which appears to be small D over big D) and denomination 4, minimal surface corrosion, not much contrast. Pedigreed to the Thomas Gray collection and formerly displayed at the ANA Money Museum's "Treasures of the Deep" exhibit (2014-15), with photo-certificate and small (original) Spink certificate. Recovered from: "Lucayan Beach wreck," sunk ca. 1628 off Grand Bahama Island

Estimate: $150 - 225