Omega Co-Axial Grasp Chronometer Gemstone Chronograph Set Moonphase: platinum alloy case and gold, 44.5 mm in diameter; width of the leg 21mm; resistance to water, 100 meters. Sapphire crystal with double anti-reflective coating. Motion, Omega 9905 caliber, computerized column wheel chronograph, Grasp Chronometer licensed, anti-magnetic to a minimum of 15,000 gauss; silicon spiral with two casing our bodies working in collection; 60-hour energy reserve. Indication of the section of the moon with the date; Sedna rotor in 18-carat gold and balanced bridge. For extra data, go to Omega.