Signature 3 buttons at the top of the fasten, This is from S/S 2011 IIRC, they make them in different new colours every season, but they go up in price season on season.
Medium
20p2p
Never owned a polo i have liked any more than this, its just top quality, never seen anyone else with one, its just too small for me, i look a bit stupid wearing it now after a slight weight gain !!