BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 16 mm, 3.79 g), Rhodian standard. ΚΑΛΧ Bull standing left on grain ear; before to left, kerykeion and monogram of ΔA. Rev. Quadripartite incuse square with stippled quarters. SNG BM Black Sea 104. Minor deposits and the obverse struck slightly off center, otherwise, about extremely fine.