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Omega

Omega Railmaster Co-Axial Master Chronometer 40mm 220.10.40.20.01.001

Omega Railmaster Co-Axial Master Chronometer 40mm 220.10.40.20.01.001

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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 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.

Learn more about Water Resistance.

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150m/500ft
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
COSC Certified Yes
  • 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

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