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OMEGA constellation deville seamaster speedmaster specialities
Specialities Skeleton 41.5 mm, yellow gold on yellow gold - 2931.80.00 - Image 1

Specialities Skeleton 41.5 mm, yellow gold on yellow gold

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Reference
2931.80.00
Case diameter
41.5 mm
Case
Yellow gold
Dial colour
Blue
Crystal
Domed anti‑reflective, scratch‑resistant sapphire crystal
Water resistance
30 bar (300 metres / 1000 feet)
Watch size
Gents
Calibre
Omega 2401
Movement Type
Self winding
Power reserve
38 hours
Material
Yellow gold
Product sheet

Key materials

  • Material - Yellow Gold

    Yellow Gold

  • 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 golds (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.

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.