Watch List notes:

SPAIN, Seville, 4 reales, Ferdinand-Isabel, assayer Gothic D to right of yoke, mintmark S to left and denomination o-iiii to right of shield, NGC MS 65, "top pop" in NGC census. Cal-564; López de la Fuente-H5.6.32. 13.60 grams. Broad flan with full legends, choice crisp details and luster on fields (currently tied with one other for finest in the NGC census atop a population exceeding thirty entries), traces of dark rainbow toning, slight partial doubling on reverse, minor edge-splits, the finest example we have ever seen.

Estimate: $3500 - $5000