IONIA. Kolophon. (Circa 530/25-500 BC). AR Obol (8.4mm 0.95g). Obv: Archaic head of Apollo to left. Rev. Quadripartite incuse square. Isegrim -. Cf. Rosen 386-7 (Tetartemorion). Cf. SNG Kayhan 342 (Hemiobol)