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Chrono Chime Co‑Axial Master Chronometer Chronograph 45 mm

Sedna™ gold on Sedna™ gold


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Available exclusively in OMEGA’s Boutiques.


The classic 45.5 mm numbered edition Chrono Chime has an 18K Sedna™ Gold case inspired by the 2nd generation Speedmaster, the CK 2998, the first watch worn in space.

The dial, in blue aventurine “Grand Feu” enamel, features an inner bezel and subdials in 18K Sedna™ Gold “exclusive acoustic waves”. The hour markers and hour/minutes hands are in diamond-polished 18K Sedna™ Gold. Providing extra touches of colour on the display are red tipped dial hands and blue CVD subdial hands.

The chime pusher at 8 o’clock sports a charming polished and embossed music note, while the split-seconds pusher at 2 o’clock has a red hybrid ceramic ring to mirror the look of the split seconds hand. Completing the look is a bracelet and buckle in 18K Sedna™ Gold.

The watch’s special presentation box in walnut features a resonance plate made of spruce to amplify the sound of each chime. The monumental case includes a magnifying glass to explore the watch’s details, a storybook and travel bag.

Providing the power is the most complicated calibre OMEGA has ever made: OMEGA’s Co-Axial Master Chronometer Calibre 1932. A fully integrated chronograph and minute repeater, which fuses both functions together in one watch movement, in order to chime the elapsed time.

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5-Year Warranty

All OMEGA watches are delivered with a 5-year warranty that covers the repair of any material or manufacturing defects. Please refer to the operating instructions for specific information about the warranty conditions and restrictions.


  • Anti‑magnetic

  • Chronograph

  • Chronometer

  • Master Chronometer Certified

  • Numbered edition

  • Small seconds

  • Tachymeter

  • Transparent case back


  • Total product weight (approx.): 326 g
  • Between lugs: 21 mm
  • Thickness: 17.3 mm
  • Case: Sedna™ gold
  • Case diameter: 45 mm
  • Water resistance: 3 bar (30 metres / 100 feet)

Dial and Crystal

  • Dial colour: Blue
  • Crystal: Scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides


  • Material: Sedna™ gold
  • Type of Clasp: Foldover butterfly clasp with comfort setting

Key materials

  • Material - Sedna<sup>TM</sup> Gold

    SednaTM Gold

  • Material - Sapphire Crystal

    Sapphire Crystal

SednaTM Gold

OMEGA has been using the exclusive 18K SednaTM Gold, its own fiery rose gold alloy, since 2012. Named after Sedna, an orbiting planetoid that has been described as one of the reddest in the solar system, SednaTM Gold not only bears all the standard characteristics of other 18K golds, but it also offers high resistance to the fading of colour and lustre over time. Its unique composition includes copper and palladium for colour and stability.

Sapphire Crystal

To really appreciate the finer details of a timepiece, OMEGA uses synthetic sapphire crystal with a highly scratch-resistant and anti-reflective treatment. Before the machining and finishing processes take place, the sapphire crystals are produced under the Verneuil process, also called flame fusion. It involves the melting of the raw substance using oxyhydrogen flame and the crystallisation of the melted droplets to form a cylinder. Graded 9 on the Mohs-hardness scale (graded 1-10), the resulting sapphire crystals are virtually scratch-proof and very hard, ensuring an unhindered vision at all times.

The advantages
of this watch

Inside 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.

SP Two Counters Chrono Chime - close chime button
Speedmaster Chrono Chime watch

Movement CALIBRE OMEGA 1932

Calibre 1932

The most complicated movement the brand has ever produced, OMEGA’s Co-Axial Master Chronometer Calibre 1932, developed with Blancpain, is a fully integrated chronograph and minute repeater. In order to chime the elpased time, the 1932 requires its own mechanical “brain” to merge the two functions and sense which one to engage. Its Co-Axial escapement, an essential component in all of OMEGA’s movements, beats at an unusual 5 Hz to display 1/10th of a second, like the pocket chronographs used to time the 1932 Olympic Games. The complex movement also integrates a security and split seconds function. The luxurious handmade calibre is satin-brushed, mirror polished and graced with 46.44 grams of gold.

  • 60 hours Power reserve
  • Manual-winding
Calibre 1932

Two counters - Chrono Chime

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