Ionia, Colophon. Archaic Tetartemorion; Ionia, Colophon; c. 525-490. BC, Tetartemorion, 0.22g. Milne-7, Kayhan-356. Obv: Head of Apollo facing. Rx: TE monogram in incuse square. The reverse monogram is an abbreviation of the denomination tetartemorion. Ex CNG 70, 21 September 2005, lot 250.Excellent image of Apollo on a coin smaller than one's little fingernail. Highly unusual to find such a small coin this well struck. EF