Mexico City, Mexico, cob 8 reales, 1731 F. S-M26; KM-47a; Cal-1425. 26.96 grams. Bold full date and mintmark, nearly full shield and cross, no corrosion, lightly toned. With generic certificate, pedigreed to the Ponterio auction of February 1998 (lot 754). From: Vliegenthart, sunk in 1735 off Zeeland, Netherlands
($200-300)