Watch List notes:

Mexico City, Mexico, cob 4 reales, 1621 D, Grade 1. S-M18; KM-44.3; Cal-908. 12.56 grams. Nearly full 21 of date above bold full oM and top of D, most of cross and shield despite typical flatness, virtually no corrosion, nicely toned. With Fisher tag and certificate 105081 (date and assayer not mentioned). From: Atocha, sunk in 1622 west of Key West, Florida
($700-1000)