Watch List notes:

BITHYNIA. Kalchedon. circa 367/6-340 BC. Drachm (Silver, 14 mm, 3.76 g), Rhodian standard. KAΛX Bull standing left on grain ear; to left, kerykeion and ΔA monogram. Rev. Quadripartite incuse square. HGC 7, 511. SNG Black Sea 104. SNG Aulock 487-488. Lovely toned and well centered; a most attractive example. Extremely fine.