Watch List notes:

IONIA. Magnesia ad Maeandrum. Circa 350-200 BC. Diobol (Silver, 12 mm, 1.72 g, 11 h), struck under the magistrate Niseis. Cavalryman, helmeted, in full armor with a billowing cloak, and holding a couched lance in his left hand, riding a horse galloping to right. Rev. ΝΙΣΑΙΟΣ / ΜΑΓΝ Bull butting to left on maeander pattern ground line; too right, wheat ear. BMC 9. SNG von Aulock 2036 (this coin). Lustrous and lightly toned. Extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, ex CGB 51, 17 November 2011, 196, Weil, 26 May 1997, 6, Münzen und Medaillen FPL 384, November/December 1976, 41, and from the collection of H. S. von Aulock.