Description??This Speedmaster Racing Master Chronometer model features a 44.25 mm stainless steel case on a brown leather strap with a black ceramic bezel ring that includes the famous tachymeter scale in orange wording and Liquidmetala??? numbers.On the sun brushed grey dial, there is a distinctive racing style minute-track which gives the watch its name. There are also two subdials with rhodium plated applied rings as well as a 6 oa??clock date window that blends with the colour of the dial. The hands are either blackened or varnished orange, while the arrowhead indexes are blackened with white Super-LumiNova.The watch is driven by the OMEGA Co-Axial Master Chronometer 9900, certified by METAS at the industrya??s highest standard.Technical DataReference329.32.44.51.06.001Between lugs??Open Case Measurement Modal21??mmLuga??toa??lug??Open Case Measurement Modal50.0??mmThickness??Open Case Measurement Modal14.9??mmCase diameter??Open Case Measurement Modal44.25??mmCaseSteelDial colourGreyCrystalDomed scratcha??resistant sapphire crystal with antia??reflective treatment on both sidesWater resistance5 bar (50??metres / 167 feet)Total product weight (approx.)107 gCalibreOmega 9900Movement TypeSelf windingPower reserve60 hoursThe advantagesof this watchInside this timepiece are the revolutionary components that guarantee the highest standards of performance. From the Co-Axial escapement for long-lasting precision, to the silicon balance spring for superior anti-magnetism, OMEGA has conquered every challenge that matters.