Watch List notes:

Mexico City, Mexico, cob 4 reales, 1731 F. S-M26; KM-40a; Cal-1094. 13.16 grams. Small, thick flan with bold full date and oM, good cross (nearly full), minimal surface corrosion, toned in crevices. With generic certificate. From: Vliegenthart, sunk in 1735 off Zeeland, Netherlands
($200-300)