BITHYNIA, Kalchedon. Circa 367/6-340 BC. AR Drachm (14mm, 3.79 g). Bull standing left on grain ear; [kerykeion] and monogram to left / Quadripartite incuse square with stippled quarters. Türkoğlu S02a; HGC 7, 511. Toned, slightly off center and a few light marks on obverse, deposits on reverse. Good VF.