Watch List notes:

THRACE. Byzantion. Circa 340-320 BC. Siglos (Silver, 18 mm, 5.39 g), Persic standard. ΠY Bull standing left on dolphin left. Rev. Quadripartite incuse square of mill sail pattern. HGC 3.2, 1389. SNG BM Black Sea 21. SNG Copenhagen 475-7. Struck slightly off center and with some scratches, otherwise, nearly extremely fine.