Watch List notes:

Mexico City, Mexico, cob 4 reales, Philip III, assayer not visible, Grade 3, ex-Atocha (1622), mounted cross-side out in twisted-wire silver bezel with 14K gold prongs and bail with sapphire. 12.91 grams total. Moderately corroded surfaces but with full shield and cross, full and bold denomination 4, the prongs broad and "three-fingered" in design. From the Atocha (1622), with Fisher certificate #202490.

Estimate: $400-600