THRACE. Byzantion. Circa 340-320 BC. Half Siglos (Silver, 14 mm, 2.53 g). ΠY Bull standing left on dolphin left. Rev. Quadripartite incuse square of mill sail pattern. Schönert-Geiss 291. SNG BM Black Sea 36–41. Sharp and clear. Extremely fine.
From the old stock of a Swiss Numismatist, acquired before 2005.