Watch List notes:

BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 14 mm, 3.75 g), Rhodian standard. KAΛX Bull standing left on grain ear; to left, kerykeion and monogram of ΔA. Rev. Quadripartite incuse square with stippled surfaces. HGC 7, 511. SNG BM Black Sea 104. Well centered and struck, lightly toned. Surfaces slightly rough, otherwise, good very fine.