Omega Speedmaster Moon Watch Professional. 3188.8.131.52.01.006. Manual winding chronograph Omega 1863 Caliber movement. Case diameter 42mm. Water resistant to 50 meters. Power reserve 48 hours. Black dial with covered by a scratch-resistant sapphire crystal. Baton hour markers, small seconds sub-dial, 30-minute recorder and 12-hour recorder along with a central chronograph hand. Black tachymeter bezel Steel bracelet with folding clasp. Box and papers. dated January 2017.