Kings of Macedon, Demetrios I Poliorketes (306-283 BC).
Silver Tetradrachm, mint of Ephesus, c. 301-295 BC.
Obverse: Nike, blowing trumpet, standing left on the prow of a galley.
Reverse: Poseidon standing left, preparing to hurl trident, monogram to left, star and A to right.
(Newell 52; HGC 3.1, 1012d).
About Good Very Fine.