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Constellation Co‑Axial Chronometer 27 mm

Yellow gold on yellow gold

123.55.27.20.05.001

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Description

The especially dramatic and enduring design concept of the OMEGA Constellation line is characterized by its famous “Griffes”, or claws, and striking dials.

This brushed model features applied gold-fashioned stars spread across its white mother-of-pearl dial which is covered by a scratch-resistant sapphire crystal. The diamond-set bezel is mounted on a 27 mm 18K yellow gold case, and is presented on an 18K yellow gold bracelet.

At the heart of this timepiece is the OMEGA Co-Axial calibre 8521, visible through the transparent caseback.

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Features

  • Automatic watch

  • Chronometer

  • Date

  • Diamonds

  • Transparent case back

Technical Data

  • Between lugs: 18 mm
  • Bracelet: yellow gold
  • Case: Yellow gold
  • Case diameter: 27 mm
  • Dial color: White
  • Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
  • Water resistance: 10 bar (100 metres / 330 feet)

Key materials

  • Material - Yellow Gold

    Yellow Gold

  • Material - Diamonds

    Diamonds

  • Material - Mother-of-pearl

    Mother-of-pearl

  • Material - Sapphire Crystal

    Sapphire Crystal

Yellow Gold

Gold in its pure form (24K) is slightly reddish yellow and very soft. It is usually alloyed with other base metals for a diverse variety of uses. Considered to be the premium standard in watch and jewellery making, 18K gold (with at least 75% pure gold) provides the ultimate balance between purity and usefulness. Traditional 18K yellow gold is alloyed with copper-silver and offers an excellent resistance to corrosion, while being highly bio-chemically inert. It provides a beautiful hue that suits wearers even with sensitive skin.

Diamonds

Diamond is recognised as the hardest material on Earth, graded 10 on the Mohs hardness scale, and is the only gem made entirely of carbon. In nature, it can only be formed under high temperature and pressure conditions that exist within a specific depth range (~100 miles) beneath the Earth's surface. To decorate its timepieces and jewellery, OMEGA uses "Top Wesselton" white COLOUR diamonds with CLARITY ranging from pure to VVS (Very Very Small inclusions). Along with choosing the best weight in CARAT, the CUT is also carefully selected in order to maximise brightness and scintillation. It goes without saying that OMEGA is a certified member of the non-profit Responsible Jewellery Council (RJC), assuring customers that its processes involving people, materials and the environment are ethical and fair.

Mother-of-pearl

Also known as "nacre", mother-of-pearl is an organic-inorganic composite material produced by some molluscs as an inner shell layer, similar to pearls. It is strong, resilient and iridescent, with changing colours depending on the wavelengths of light at different viewing angles. Produced with exquisite skill and delicacy, OMEGA's ladies' collection offers mother-of-pearl dials of top quality, enhanced with specific attributes.

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.

Movement CALIBRE OMEGA 8521

Calibre 8521

Self-winding movement with Co-Axial escapement. Free sprung-balance system with silicon balance-spring. Automatic winding in both directions. Oscillating mass and balance bridge in 18 Ct red gold. Luxury finish with exclusive Geneva waves in arabesque.

  • 50 hours Power reserve
  • Self winding
Calibre 8521

Variations Constellation Co‑Axial Chronometer 27 mm

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