BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 14 mm, 3.76 g), Rhodian standard. KAΛX Bull standing left on grain ear; to left, kerykeion and monogram of ΔA. Rev. Quadripartite incuse square with stippled quarters. HGC 7, 511. RG 15. SNG BM Black Sea 104. The obverse struck somewhat off center, otherwise, extremely fine.