BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 15 mm, 3.72 g), Rhodian standard. KAΛ[X] Bull standing left on grain ear; to left, kerykeion and monogram of ΔΑ. Rev. Quadripartite incuse square with stippled quarters. HGC 7, 511. RG 15. SNG BM Black Sea 104. The obverse struck slightly off center, otherwise, about extremely fine.