Watch List notes:

BITHYNIA. Kalchedon. Circa 367/6-340 BC. Tetradrachm (Silver, 22 mm, 15.06 g), Rhodian standard. KAΛX Bull standing left on grain ear; before, monogram of ΔA. Rev. Quadripartite incuse square with stippled quarters. RG p. 292, 14. SNG BM Black Sea 93. Good very fine.