Thrace, Byzantion (c. 230 BC), Silver Tetradrachm, 13.5 gms., draped head of Demeter, wreathed with corn, right, rev. Poseidon seated right, holding trident and aplustre (BMC 25; Schonert-Geiss, Munzpragung von Byzantion, vol. 1, 981), very fine, and scarce