Bithynia, Kalchedon, circa. 367/6-340 BC. AR Drachm (14 mm, 3,78 g.). Rhodian standard. KAΛX Bull standing to left on grain ear; to left, kerykeion and ΔA monogram. Rev. Quadripartite incuse square. SNG Black Sea 104. SNG von Aulock 487-8. Obverse struck slightly off center, otherwise, good very fine with very well defined body, symbols and monograms with a lovely old collection toning.