Watch List notes:

BITHYNIA. Kalchedon. Circa 367/6-340 BC. Drachm (Silver, 13.5 mm, 3.77 g, 1 h), Rhodian standard. KAΛX Bull standing left on grain ear; to left, kerykeion and ΔA monogram. Rev. Quadripartite incuse square. HGC 7, 511. SNG Black Sea 104. SNG Aulock 487-8. Lightly toned. Very fine.

From the Trausnitz Collection, ex G. Hirsch 201, 24 September 1998, 219.