The Fontainemelon 2617 is a mechanical watch movement that was used from 1949 to 1968. It features a Breguet hairspring and a regulator with a catch device for the hairspring. It is a manual-wind chronograph movement with functions including a 60-second counter, a 30-minute counter, a 12-hour counter, and a sub-second indicator. The movement is equipped with a pillar wheel for the chronograph functionality.