Northern Greece, Macedonia, Potidaea (c.520-480 BC), Tetradrachm, 16.7 gms., Poseidon Hippios riding horse right, holding trident, rev. four part incuse punch (cf. BMC 1, Boston 584, Rosen 107 and SNG Cop. 312 - all have a star under the horse's body), some scratches, toned, rare and good fine