THRACE, Byzantium, c. 340-320 BCE (dated by Schonert-Geiss to c. 411- 387/6 BCE). AR drachm, 5.10g, 17.5mm.
Obv: ΠΥ, heifer stepping left on dolphin left.
Rev: Mill sail incuse with granular surface.
SNG BM 21-33.
From the Tiberius Collection.
A type needed by every Greek collector, but also every Roman collector as well, since Byzantium became Constantinople.