Watch List notes:

IONIA. Kolophon. late 6th century BC. Obol (Silver, 9 mm, 0.98 g). Archaic head of Apollo to left. Rev. Quadripartite incuse square. Isegrim -. Cf. Rosen 386-7 (Tetartemorion). Cf. SNG Kayhan 342 (Hemiobol). Very fine.
From the collection of a scholar.