BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 16 mm, 3.71 g), Rhodian standard. KAΛX 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. Well centered and attractive. Slightly rough, otherwise, about extremely fine.