Watch List notes:

BITHYNIA, Kalchedon, (c.340-320 B.C.), silver siglos (Persian standard), (5.28 g), obv. bull standing to left, [on corn-ear], above **KALC* rev. quadripartite incuse square of mill-sail pattern, (S.3738, SNG BM Black Sea 112ff. [siglos], SNG von Aulock 482). Extremely fine, edge crack, scarce.