Thrace, Byzantion ( Silver. 14.80 g. 22 mm) AR Tetradrachm/Stater. Circa 387/6-340 BC. Bull standing to left atop dolphin; 'ΠΥ above, monogram to left Rev: Stippled quadripartite incuse square. Cf. Schönert-Geiss 650-711; HGC 3.2, 1386.