The Fontainemelon 14 watch movement is a manual wind movement with a pin-lever escapement. It features a ratchet on the dial side and a crown mechanism with a rocker bar. The 671 movement has similar characteristics to the 681 movement, although the exact differences between them are not known. The movement includes functions such as a sub second display, adjustable stud holder, bascule winding, KIF shock protection, and pin lever. It was produced around the period of 1965.