Looks like Ajax is right on the money with his attribution! I'll chime in with a similar coin from Cyzicus: Greek AE 17 Mysia, Cyzicus, c. 400 BC - 280 BC or later 4.02 g; 17.3 mm Obv: Head of Kore Soteira, right. Rev: KYZI, tripod, tunny fish below, plectrum to right. Refs: BMC 37, 136; Sear Greek 3861; c.f. SNG Cop 62.
Greek city of Megara in Megaris Bronze (18mm, 3.7 gm.), 400-338 BC or 307-243 B.C. Laureate head of Apollo right. ME ГA - PEΩN either side of tripod.