Watch List notes:

BITHYNIA. Kalchedon. Circa 367/6-340 BC. Tetradrachm (Silver, 23 mm, 14.71 g), Rhodian standard. KAΛX Bull standing left on grain ear; before, monogram. Rev. Quadripartite incuse square with stippled quarters. RG 12. SNG BM Black Sea 97-8. Nicely toned. Minor areas of weakness, otherwise, very fine.