Watch List notes:

Mexico City, Mexico, 4 reales, Charles-Joanna, "Late Series," assayer A/G to right, mintmark M to left (M-A/G), rare, NGC AU 58 / Golden Fleece (ca. 1550). Nesmith-unl; Cal-unl; S-M6; KM-18. 13.53 grams. Not a known Nesmith variety for either assayer G or A, but consistent with other details, struck on a broad flan with pristine surfaces harboring muted luster under lovely light toning, all details full and sharp (no doubling), struck just a hair off-center, the all-important A/G fairly clear. From: "Golden Fleece wreck," sunk ca. 1550 in the Northern Caribbean
($1250-2000)