Omega Railmaster 220.10.40.20.01.001

Model #: 220.10.40.20.01.001 Omega Railmaster Co-Axial Master Chronometer 40mm Mens Watch

Brushed stainless steel case. Brushed stainless steel bezel ring. Black dial with a fine linear brushed finish. Printed 3/6/9/12 Arabic numeral hour markers. Vintage colored luminous index hour makers. Fine printed minutes/seconds track. Hands with vintage colored luminous fill. Screwed-in solid case back with the Seamaster Seahorse logo oriented & aligned with the watch, thanks to Omega's patented Naiad Lock system. Movement: Omega caliber 8806, beats at 25,200 vph, contains 35 Jewels & has an approximate power reserve of 55 hours. Anti-magnetic: resistant to magnetic fields greater than 15'000 gauss. The movement features Omega's "Si 14" silicon balance spring, which contributes to the movements outstanding resistance to shock and to environmental disturbances and thus to the watch’s chronometric performance. The movement also features Omegas Co-Axial Escapement which contributes to greater precision, stability & durability. The Co-Axial escapement has less friction & reduces the necessity of lubrication thus reducing the time intervals required between servicing Alternate model # 22010402001001 Condition : New/Unworn Case Shape : Round Case Dimensions : 40mm Case Material : Stainless Steel Dial Color : Black Crystal : Scratch Resistant Sapphire Bezel : Fixed Screw-in Crown : Yes Water Resistance No ratingDoes not allow contact with water 30m/99ft - 50m/165ftAllows for contact with water such as washing hands and rain 50m/165ft - 100m/330ftAllows for light poolside swimming 100m/330ft - 200m/660ftAllows for swimming, snorkeling and showering (do not expose to hot water) 200m/660ft - 500m/1650ftAllows for impact water sports such as board diving and scuba diving 500m/1650ft +Appropriate for serious deep water diving. Learn more about Water Resistance. Close : 150m/500ft No rating : Does not allow contact with water 30m/99ft - 50m/165ft : Allows for contact with water such as washing hands and rain 50m/165ft - 100m/330ft : Allows for light poolside swimming 100m/330ft - 200m/660ft : Allows for swimming, snorkeling and showering (do not expose to hot water) 200m/660ft - 500m/1650ft : Allows for impact water sports such as board diving and scuba diving 500m/1650ft : Appropriate for serious deep water diving Case Back : Solid Band Material : Stainless Steel Color/Finish : Brushed Clasp : Push Button Deployant Buckle Clasp Features : Push-Button Quick Micro Adjustment Lug Width : 20mm Movement : Automatic - Chronometer An automatic/self-winding movement is powered by a thin spiral torsion spring, called the mainspring, which is housed in an enclosed barrel inside the movement. The energy produced from the wound spring drives the movement functions. An automatic watch has a weighted rotor mounted on a pivot to the back of the movement, and the rotor is connect to the mainspring through a series of gears. The natural motion of the wearers wrist will cause the rotor to spin, which in turn will automatically wind the mainspring. Please note: An automatic winding watch which has completely wound-down or is at the end of its power reserve requires manual winding. Manually winding an automatic watch ensures that the watch is at full power-reserve when first worn, and as long as the watch is in motion thereafter it will remain fully wound, ensuring that when the watch is removed it will run the specificed power-reserve duration. Close COSC Certified : Yes