Celtic World. Gaul, Massalia. AR Hemiobol, c. 485-470 BC. Obv. Facing gorgoneion with protruding tongue. Rev. Quadripartite incuse square. Furtwangler, Auriol, group M, pl. 16-7. 0.54 g. 7.00 mm. RR. Very rare and choice for the issue. Good VF.