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| Model | Omega (321) |
|---|---|
| Model Range | Speedmaster Pre-moon |
| Case material | Steel |
| Case size | 44mm |
| Gender | Male |
| Has Box | No |
| Has Papers | No |
| Strap material | Stainless – Steel |
| Vintage | No |
The Speedmaster”s history goes back to 1957 when it was introduced as a sports and racing chronograph, complementing Omega”s position as the official timekeeper for the Olympic Games.
The "Speedmaster" name was chosen for its tachymeter scale bezel and following the Omega convention used for other models like the Seamaster – initially the Speedmaster was part of the Seamaster line – and the Railmaster.
The movement of choice was the Calibre 321 that was introduced in 1942 as a joint project between Omega and Lemania, one of Omega”s subsidiaries at the time, who supplied it as an ebauche (Lemania cal. 2310). Calibre 321 is recognised as one of the best example of lateral clutch, column wheel controlled chronograph and it was used as a base movement by Breguet, Patek Philippe and Vacheron Constantin in a variety of chronographs. In 1946, the movement was further enhanced by adding protection to magnetic fields and shocks, something that later will prove to be very important to pass NASA tests.
