Silver, 0.19 grams, 6.31 mm. Kolophon, Ionia. 490-400 BC. Obverse: no legend, head of Apollo with long hair, facing. Reverse: TE monogram in incuse square. Milne NNM 96, 8; SNG Copenhagen 133-134; Sear 4343. Note: These are amongst the oldest coins with the value marked on the reverse (TE = Tetartemorion = one quarter obol). Good very fine.