Omega Constellation Co-Axial Master Chronometer 41mm 131.30.41.21.04.001 - White dial / Stainless steel. Caliber 8900 Master Chronometer, 60h power reserve, 15,000 Gauss anti-magnetic. 41mm steel case, mono-rang bracelet, folding clasp with comfort setting. White sun-brushed dial with date. New & unworn with box, papers, 5-year Omega warranty.