Watch List notes:

CYCLADES, Keos. Koressos. Circa 480-470 BC. AR Trihemitetartemorion (6.5mm, 0.39 g, 3h). Dolphin left; O below / K within incuse square. Sheedy Series III, 41 var. (dolphin right); Papageorgiadou-Banis Series III, 37 var. (same); HGC 6, 585 var. (same). VF, toned, porous. Well centered. Extremely rare with dolphin left.