Watch List notes:

BITHYNIA. Kalchedon. Circa 340-320 BC. Drachm or siglos (Silver, 17.5 mm, 5.26 g). KAΛX Bull standing to left on a grain ear. Rev. Quadripartite incuse square. HGC 7, 517. SNG BM Black Sea 112. Well-centered. Good very fine.