Authentic Omega Model 304.30.44.52.01.001, also known as O30430445201001 or 304-30-44-52-01-001. Features a stainless steel case and brushed/silver-tone bracelet with polished finish clasp (deployment push button). Equipped with Co-Axial Master Chronometer Calibre 9904 automatic movement rated at CHF +6 accuracy per day for 6 days, providing 60 hours power reserve. Fixed Tachymeter bezel. Black metallic dial features silver-tone hour markers and hands, along with tachymeter scale visible on the face. Includes Date display at the nine o'clock position, small seconds sub-dial, twelve-hour chronograph sub-dial. Moonphase complication. Screw-down sapphire crystal case back resistant to scratches. 44mm diameter stainless steel case. Rated water resistance up to 100 meters (330 feet). Comes with a 5 year WatchMaxx warranty.