BITHYNIA, Kalchedon. 357-340 BC. AR drachm (3,67 g). KAΛX, bull standing left; grain ear below; caduceus to left; monogram to left; A beneath bull / stippled quadripartite incuse square. Struck on a tight flan. Attractively toned. SNG BM Black Sea 104, HGC 7, 511, Ex Gitbud & Neumann Auction 38, lot 206. Grade: 01