BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 15 mm, 3.68 g), Rhodian standard. KAΛX Bull standing left on grain ear; to left, kerykeion and star. Rev. Quadripartite incuse square with stippled quarters. HGC 7, 511 var. (differing controls). RG 15. SNG BM Black Sea 96 var. (same controls but tetradrachm). Harshly cleaned, otherwise, about extremely fine.