Omega Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Sedna Gold Case - Sun Brushed Blue Dial - Blue Leather Strap - 329.53.44.51.03.001 Manually co-axial escapement for greater precision

co-axial escapement for greater precision stability and durability

4 mm 18K yellow gold case

42 mm stainless steel case with helium escape valve

unidirectional rotating bezel with a white enamel diving scale

Calibre Omega 321 manual-winding movement with chronograph and small seconds

Omega Speedmaster Racing Co-Axial Master Chronograph Watch - 44.25 mm Sedna Gold Case - Sun Brushed Blue Dial - Blue Leather Strap - 329.53.44.51.03.001 Manually co-axial escapement for greater precision44. 25 mm 18K Sedna gold case with antimagnetic design, transparent back, 18K Sedna gold bezel with blue ceramic ring and tachymeter scale in Ceragold, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, sun brushed blue dial with racing style minute track, caliber 9901 self winding Co Axial master chronometer movement with chronograph and date functions, approximately 60 hours of power reserve, blue leather strap.