Watch List notes:

BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 15 mm, 3.72 g), Rhodian standard. KAΛX Bull standing left on grain ear; to left, kerykeion. Rev. Quadripartite incuse square of mill sail pattern with stippled quarters. HGC 7, 511. RG 15. SNG BM Black Sea 101-102. Minor marks, otherwise, about very fine.