Watch List notes:

MYSIA, Kyzikos. Circa 550-450 BC. EL Hekte – Sixth Stater (10mm, 2.64 g). Janiform head of nymph, wearing stephanos, left and satyr right; below, tunny right / Quadripartite incuse square. Von Fritze I 76; Boston MFA 1426 = Warren 1466; SNG BN –; Triton XX, lot 203 (same die). VF, toned, banker's mark on obverse. Extremely rare issue, Greenwell noted only a hekte in the Hermitage, von Fritze illustrates the Boston piece, and there is only one in CoinArchives.