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Broad Arrow Co‑Axial Chronometer Chronograph 42 mm

Yellow gold on leather strap

321.53.42.50.02.001

Note: watch no longer available

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Description

The OMEGA Speedmaster is one of OMEGA’s most iconic timepieces. Having been a part of all six lunar missions, the legendary Speedmaster is an impressive representation of the brand’s adventurous pioneering spirit. This OMEGA Speedmaster Broad Arrow 1957 Chronograph features a silver dial graced by a small seconds sub-dial, 30-minute recorder and 12-hour recorder along with a central chronograph and 18K yellow gold “broad arrow” hour and minute hands, as well as a scratch-resistant sapphire crystal. There is a date window at the 6 o’clock position. The bezel, with its tachymetric scale, is mounted on a 42 mm 18K yellow gold case and presented on a brown leather strap. At the heart of this timepiece is the Co-Axial calibre 3313 which is visible through the transparent caseback.

Features

  • Automatic watch

  • Chronograph

  • Chronometer

  • Date

  • Small seconds

  • Tachymeter

  • Transparent case back

Technical Data

  • Between lugs: 20 mm
  • Bracelet: leather strap
  • Case: Yellow gold
  • Case diameter: 42 mm
  • Dial colour: White
  • Crystal: Scratch‑resistant sapphire crystal with anti‑reflective treatment inside
  • Water resistance: 10 bar (100 metres / 330 feet)

Movement

  • Calibre: OMEGA 3313
  • Self‑winding chronograph movement with column wheel mechanism and Co‑Axial escapement. Free sprung balance, with date, hour, minute and continuous small seconds hands, central chronograph hand.
  • Power reserve: 52 hours
  • Type: Self winding

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 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.

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.

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