Ancients; Thrace, Sarmatia, Olbia, 5th Century BC, Cast Bronze Dolphin Coinage, An interesting early cast coinage from the shores of the Black Sea. Even in modern times The Black Sea still contains one of the largest populations of bottlenose dolphins. Rarely encountered in such nice shape. BMC Thrace Sarmatia 19, 1.05g, 23.2 mm.