Watch List notes:

MYSIA. Kyzikos. Circa 500-450 BC. Stater (Electrum, 21 mm, 16.06 g). Forepart of man-headed bull/river god to right; behind, tunny upward. Rev. Quadripartite incuse square. BMFA 1491 (same dies). Greenwell 51. SNG Paris 320. Von Fritze 174 and pl. V, 22. Very rare. Well-centered and with a powerful representation of a noble-looking river god. Minor marks and scrapes, otherwise, about extremely fine.
From a European collection, ex Gorny & Mosch 215, 13 October 2013, 867.