Watch List notes:

BITHYNIA. Kalchedon. Circa 367/6-340 BC. Tetradrachm (Silver, 21 mm, 15.05 g), Rhodian standard. KAΛX Bull standing left on grain ear. Rev. Quadripartite incuse square with stippled quarters. RG 12. SNG BM Black Sea 97-98. Minor deposits, otherwise, very fine.