CK2915-3
Speedmaster Pre-Professional Broad Arrow CK2915 — CK2915-3
1959
Third series, seen with either broad arrow or alpha hands and with either the steel bezel or a black Base 1000 bezel; no pattern between the two is proven. “Speedmaster” moves from the bevel to the back, nearer the seahorse. Observed numbers around 16.64M.
Identifying details
- Applied Omega logo
Raised metal Omega symbol on the dial, rather than a printed one.
- Straight lugs
Symmetrical case with straight lugs and no crown guards.
Variants of CK2915
Reference overview →| Variant | Production |
|---|---|
| CK2915-1 | 1957–1958 |
| CK2915-2 | 1958–1959 |
| CK2915-3Current | 1959 |
| CK2915-3 · CK2915-3, Broad Arrow Hands | Undated |
Case & movement
- Reference
- CK2915
- Production
- 1959
- Case material
- Stainless steel
- Case diameter
- 38.5 mm
- Crown
- 7 mm
- Crown guards
- None
- Movement
- Manual winding
- Caliber
- Omega 321
Dial, bezel & hands
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