Kalchedon, Bithynia, AR drachm, 3.77 g ca 350 BC.

KALX above Bull standing left on corn ear, caduceus to left.
Quadripartite incuse square, the surfaces granulated. 

Sear SG 3742; SNG Cop 352; BMC 14; Traité II-2, 2884.

Sold by Stack's Bowers Galleries Ponterio sale 185 ANA Auction session D, Lot 30100, Aug 2014
Starting Price: $60