The Cintrée Curvex is without a doubt Franck Muller's most iconic case shape. In fact, Franck Muller was highhandedly responsible for bringing back the tonneau-shaped case when he first introduced it in the late '80s! As with more of the FM cases, the shape is heavily inspired by the Art Deco watches of the 1920's. The curvature of the case and the glass are spectacular! The Cintrée Curvex is available with most complications and movements offered by Franck Muller.