Watch List notes:

BITHYNIA, Kalchedon. Circa 367/6-340 BC. AR Tetradrachm (22mm, 15.08 g). Rhodian standard. Bull standing left [on grain ear]; B to left / Quadripartite incuse square with stippled quarters. RG 12; HGC 7, 509; SNG BM Black Sea 97–8. VF for type, toned, off center on obverse.