Mexico City, Mexico, cob 1/2 real, 1615/4F, very rare. S-M17; KM-unl; CT-unl. 1.56 grams. Bold date with certain 5/4 (first example we ever heard of), bold full monogram with oM to left and F to right, fleur below, choice full cross, richly toned AVF with two old marks below monogram and fresh hairline scratches above. ($400-600)