Tetradrachm of Olynthos (?) with quadriga

Obverse: Quadriga to right, horses walking; bearded charioteer in long, sleeveless, girdled chiton; in outstretched left hand, reins, in raised right hand, a whip with two lashes; above, a large globule; double exergue line. Between tail and legs, X Reverse: Eagle flying left, right wing raised, left wing lowered, in square incuse within a larger one with rough surface; corners of inner square connected with those of outer by diagonal lines.