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Omega Seamaster 300m Diver Co-Axial Chronograph 42mm

Omega Seamaster 300m Diver Co-Axial Chronograph 42mm


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Condition New/Unworn
Case Shape Round
Case Dimensions 41.5mm
Case Thickness 16.8mm
Case Material Stainless Steel
Dial Color Blue
Crystal Scratch Resistant Sapphire
Bezel Uni-Directional Rotating
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.

Case Back Solid
Band Material Stainless Steel
Color/Finish Brushed & Polished
Clasp Push Button Folding Clasp
Movement Automatic - Chronometer
Complications Chronograph
COSC Certified Yes
  • Brushed-finished stainless steel case with polished edges.
  • Brushed-finished stainless steel bracelet with polished-finished thin center links.
  • Steel unidirectional rotating bezel with polished blue ceramic fill.
  • Lacquered blue dial with luminous dot hour markers.
  • Skeletonized hour and minute hands with luminous edges. Red subdial hands and seconds hand with luminous fill.
  • Chronograph/stopwatch functions:
    • Large red central seconds hand.
    • 30-minute counter located at 3 o'clock.
    • 12-hour counter located at 6 o'clock.
  • Small seconds hand sub-dial at the 9 o'clock position.
  • Date window located at the 6 o'clock position within the subdial.
  • Helium escape valve and date corrector located at 10 o'clock on the case edge.
  • COSC-certified Omega Caliber 3330 automatic chronograph movement with a column-wheel mechanism, a Co-Axial Escapement, and a silicon balance spring:
    • 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 the now-standard 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 required between servicing.
    • The combination of the SI 14 balance spring & the Co-Axial escapement makes for an extremely reliable & stable movement.
    • The movement beats at 28,800 vph, contains 31 jewels, and has a power reserve of 52 hours.
  • Stainless steel case back is stamped with the seahorse medallion.

Alternate model # 21230425003001

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