Watch List notes:

Mexico City, Mexico, cob 8 reales, 1615/4 F, very rare, ex-Sao Jose (1622). S-M17; KM-unl; Cal-unl. 25.02 grams. Round flan with good full cross, most of shield with clear oMF to left inside most of 615 of date, the last digit characteristically as a backwards 2 with faint trace of smaller 4 underneath (in fact, by our records, all 1615s are 5/4), toned Fine with some flatness and areas of corrosion near edge. Formerly NGC #1973908-022. From the Sao Jose (1622), pedigreed to Sedwick Auction 16 (lot 277).
($300-450)