CK2998-1
Speedmaster Pre-Professional CK2998 — CK2998-1
1959–1960
First series, introduced in autumn 1959. Black Base 1000 bezel, alpha hands, short subdial markers; dial with oval or round “O”. Movement numbers typically 17.301M–17.761M.
Identifying details
- Alpha hands
Tapered, leaf-shaped hour and minute hands.
- “Base 1000” bezel
Tachymetre scale graduated for a 1000-unit base.
Variants of CK2998
Reference overview →| Variant | Production |
|---|---|
| CK2998-1Current | 1959–1960 |
| CK2998-1 · CK2998-1, Lollipop Chronograph Hand | Undated |
| CK2998-1 · CK2998-1, Pulsometer Bezel | Undated |
| CK2998-2 | 1960 |
Case & movement
- Reference
- CK2998
- Production
- 1959–1960
- Movement serials
- c. 17.3M–17.76M
- Case material
- Stainless steel
- Case diameter
- 39.7 mm
- Crown
- 7 mm
- Crown guards
- None
- Movement
- Manual winding
More specifications (1)
Movement
Omega 321
Hand-wound column-wheel chronograph of Lemania origin (Lemania 27 CHRO C12 / 2310 family), used by Omega from 1946 to 1968 and in every Speedmaster up to the 145.012. Early examples have a symmetrical clutch bridge; later ones an asymmetrical bridge.
Manual winding · Introduced 1946 · 18,000 vph · 17 jewels · Ø 27 mm
Read more
- The Complete Guide To The Omega SpeedmasterRead more at HODINKEE (opens in a new tab)
- First Series Omega Speedmaster CK2998-1, an absolute grail watchRead more at Fratello (opens in a new tab)
- A Guide to the Evolution of the Omega Speedmaster Moonwatch, Reference by ReferenceRead more at Monochrome Watches (opens in a new tab)