Watch List notes:

BITHYNIA. Kalchedon. Circa 340-320 BC. Quarter Siglos (Silver, 11 mm, 1.08 g), Persic standard. ΚΑ Bull standing left on grain ear. Rev. Quadripartite incuse of mill-sail pattern. HGC 7, 519. RG 11. SNG BM Black Sea 124-6. Porosity, otherwise, very fine.