Omega
Omega Speedmaster CK2915-1 CK2915-1
“Broad Arrow”
The Omega Speedmaster CK2915-1 (reference CK2915-1) is a stainless steel watch with a black dial. It runs on the manual caliber 321. It was introduced in 1957.
Specifications
Case
- Reference
- CK2915-1
- Nickname
- Broad Arrow
- Collection
- Speedmaster
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Plexi
Dial and bezel
- Dial
- Black
- Bezel
- Engraved steel tachymeter (Base 1000)
Movement
- Movement
- Manual
- Caliber
- 321
Production
- Production
- 1957 – today (vintage)
Dial versions
This reference was made with these dials and finishes.
CK2915-1 Broad Arrow
Broad Arrow hands; stepped dial with recessed sub-registers; engraved steel tachymeter bezel · “Broad Arrow”
How it compares within the Speedmaster family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| CK2915-1 (This watch) | — | Stainless steel | Black | 321 | 1957– |
| 310.30.42.50.04.001 | 42 mm | Stainless steel | White | 3861 | 2024– |
| 310.92.44.50.06.001 | 44.25 mm | Grey ceramic | Grey (skeletonised) | 3869 | 2025– |
| 310.92.44.50.06.002 | 44.25 mm | Grey ceramic | Grey (skeletonised) | — | 2025– |
| 318.90.45.79.01.003 | 45 mm | Titanium | Black | 5622 | 2022– |
| 332.10.41.51.01.001 | 40.5 mm | Stainless steel | Black | 9906 | 2022– |
| 332.10.41.51.03.001 | 40.5 mm | Stainless steel | Blue | 9906 | 2022– |
| 522.30.38.50.04.001 | 38 mm | Stainless steel / ceramic | White | 3330 | 2025– |
| 522.30.38.50.04.002 | 38 mm | Stainless steel / ceramic | White | 3330 | 2025– |
About the Speedmaster family
The Speedmaster was introduced in 1957 as a sports chronograph with the tachymeter scale on the bezel. It passed NASA's tests in 1965 and was worn on the Moon in 1969, which is why the hand-wound Professional is known as the Moonwatch. Its movement has gone from the caliber 321 to the 861 and 1861, and in 2021 to the Master Chronometer 3861.
Around the Moonwatch the line includes the Speedmaster Racing, the ceramic Dark Side of the Moon, automatic chronographs, the smaller Speedmaster 38 and many special editions. Dealers check the caliber, the crystal (Hesalite or sapphire), the caseback engraving and the reference, and on vintage pieces look closely at dial, bezel and hands.
Quick answers
- What movement does the Omega Speedmaster CK2915-1 CK2915-1 use?
- It uses the manual caliber 321.
- Is the Omega Speedmaster CK2915-1 CK2915-1 still in production?
- Vintage.
- When did the Omega Speedmaster CK2915-1 CK2915-1 come out?
- It was introduced in 1957.
- What is the Omega Speedmaster CK2915-1 CK2915-1 made of?
- The case is stainless steel.
- What is the Omega Speedmaster CK2915-1 CK2915-1 nicknamed?
- Dealers and collectors call it the “Broad Arrow”.
Catalog facts checked October 2026.