Watch List notes:

BITHYNIA, Kalchedon. Circa 367/6-340 BC. AR Tetradrachm (21mm, 14.67 g). Rhodian standard. Bull standing left on grain ear; kerykeion and star to left / Quadripartite incuse square with stippled quarters. RG 12; HGC 7, 509; SNG BM Black Sea 96. Near VF, lightly toned, some porosity, flan flaw on reverse.