Watch List notes:

BITHYNIA, Kalchedon. Circa 340-320 BC. AR Siglos (17mm, 5.29 g). Bull standing left on grain ear / Incuse square of mill-sail pattern. SNG BM Black Sea 112; SNG von Aulock 482; HGC 7, 517. VF, toned, small test cut on bull.

From the Patrick H. James Collection. Ex Deyo Collection (Classical Numismatic Group 90, 23 May 2012), lot 567; Vecchi 8 (4 December 1997), lot 99.