BITHYNIA, Kalchedon. Circa 367/6-340 BC. AR Tetradrachm (22mm, 15.10 g). Rhodian standard. Bull standing left on grain ear; ΔA monogram to left / Quadripartite incuse square with stippled quarters. Türkoğlu S02a; HGC 7, 509. Lightly toned, area of weak strike on obverse. Near EF.
