Omega Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Steel Case - Black Ceramic Bezel - Black Dial - 329.30.44.51.01.001

44.25 mm stainless steel case with antimagnetic design, transparent back, black ceramic bezel with tachymeter scale in liquidmetal, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, black dial with racing style minute-track, caliber 9900 self-winding Co-Axial master chronometer movement with chronograph and date functions, approximately 60 hours of power reserve, stainless steel bracelet. Water resistant to 50 m (167 ft).