BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 15 mm, 3.80 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. Harshly cleaned and somewhat rough, otherwise, about extremely fine.