Watch List notes:

Bithynia, Kalchedon. Ca. 340-320 B.C. AR siglos (18.01 mm, 5.34 g). KAΛX, Bull standing left, grain ear below / Quadripartite square of mill-sail pattern. SNG BM Black Sea 112; SNG von Aulock 482; SNG Cop 348. Toned EF.