Watch List notes:

THRACE. Byzantion. Circa 340-320 BC. Siglos (Silver, 18 mm, 5.13 g). ΠY Bull standing left on dolphin left. Rev. Quadripartite incuse square of mill sail pattern. HGC 3, 1389. Schönert-Geiss, Byzantion 1-235. Slightly corroded, otherwise, very fine.