Kolophon, Ionia, AR Tetartemorion. 7 mm, 0.14 g. 525-490 BC. Facing head of Apollo. Quadripartite incuse square divided wheel-like, with small circle in the centre. SNG von Aulock 7902; Klein 400. With permission of Gitbud & Naumann Auction 34, Lot 324, Aug. 2015.