Watch List notes:

THRACE, Byzantion. Circa 387/6-340 BC. AR Drachm (14mm, 3.69 g). Heifer standing left on dolphin left; trident head below raised foreleg / Incuse punch of mill-sail pattern. Schönert-Geiss, Byzantion 712–32; HGC 3, 1387 corr. (trident head not noted; reverse type is either mill-sail or quadripartite square). VF, deeply toned.

From the WRG Collection. Ex Coin Galleries (12 April 1994), lot 52.