Omega Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Steel Case - Sedna Gold Bezel - Matt Grey Dial - Grey Leather Strap - 329.23.44.51.06.001

44.25 mm stainless steel case with antimagnetic design, transparent back, 18K Sedna gold bezel with silicon nitride ring and tachymeter scale in Ceragold, domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, matt grey 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, grey leather strap. Water resistant to 50 m (167 ft).