Roger Dubuis Excalibur MCF watch with a 42mm MCF (mineral composite fibre) case, an exhibition caseback, water-resistance up to 30 meters, an automatic movement, hour and minute functions, a skeletonized dial with Pinçon de Genéve finishing, and a skeletonized micro-rotor. The MCF material is UV resistant, 13% lighter than carbon, and contains stable resin which will allow the white material to retain its bright color over time. This watch comes on a white rubber strap with a titanium and stainless steel folding clasp.