Watch List notes:

Mexico City, Mexico, cob 8 reales, Philip III, assayer D. S-M18; KM-44.3; Cal-Type 162. 16.93 grams. Good full shield and cross despite typical thinning and corrosion, clear oMD, much better than average for this scarce wreck. With original Seahawk certificate 91-1A-2442.0001. From: "Dry Tortugas wreck," sunk ca. 1622 west of Key West, Florida
($250-375)