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OMEGA constellation deville seamaster speedmaster specialities
  • Seamaster 41.5 mm, steel - red gold on steel - gold - 231.20.42.21.06.001 - Image 1
  • Seamaster 41.5 mm, steel - red gold on steel - gold - 231.20.42.21.06.001 - Image 2

Seamaster 41.5 mm, steel ‑ red gold on steel ‑ gold

Reference
231.20.42.21.06.001
Lug‑to‑lug
48.5 mm
Thickness
13.0 mm
Case diameter
41.5 mm
Case
Steel ‑ red gold
Dial colour
Grey
Crystal
Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
Water resistance
15 bar (150 metres / 500 feet)
Watch size
Gents
Total product weight (approx.)
169 g
Calibre
Omega 8500
Movement Type
Self winding
Power reserve
60 hours
Material
Steel ‑ gold
Type of Clasp
Butterfly clasp
Product sheet

Key materials

  • Material - Red Gold

    Red Gold

  • Material - Stainless Steel

    Stainless Steel

  • Material - Sapphire Crystal

    Sapphire Crystal

Red 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 red 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.

Stainless Steel

Stainless steel is certainly the most conventional of watchmaking materials for outer craftsmanship, and offers beauty, strength and affordability. OMEGA uses 316L stainless steel. Known for its corrosion-resistance and high lustre after polishing, this material is often the ideal choice for watches in both daily-use and high-stress situations such as diving and adventure.

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

At the heart of this timepiece is the Co-Axial escapement, a revolution in watchmaking when first introduced. The reduced stress on the moving parts means less need for lubrication, longer-lasting accuracy and a more stable power reserve rate. In short, this timepiece performs better for longer.

Movement Calibre OMEGA 8500

Calibre 8500

Self-winding movement with Co-Axial escapement. Free sprung-balance, 2 barrels mounted in series, automatic winding in both directions. Bridges and the oscillating mass are decorated with exclusive Geneva waves in arabesque.

  • Self winding
  • 60 hours Power reserve
  • Frequency 3,5 Hz
Calibre 8500