Omega
Omega Speedmaster Professional Mark II Racing ST145.014RACING
The Omega Speedmaster Professional Mark II Racing (reference ST145.014RACING) is a 41.75 mm stainless steel watch with a grey dial. It runs on the manual caliber 861 and is water resistant to 50 m. It was made from 1969 to 1976.
Specifications
Case
- Reference
- ST145.014RACING
- Collection
- Speedmaster
- Case size
- 41.75 mm
- Thickness
- 14.55 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Mineral
- Water resistance
- 50 m
- Bracelet / strap
- Stainless steel
Dial and bezel
- Dial
- Grey
- Bezel
- Tachymeter
Movement
- Movement
- Manual
- Caliber
- 861
Production
- Production
- 1969–1976
Dial versions
This reference was made with these dials and finishes.
ST145.014RACING Grey
Orange accents (Racing version)
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 |
|---|---|---|---|---|---|
| ST145.014RACING (This watch) | 41.75 mm | Stainless steel | Grey | 861 | 1969–1976 |
| 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 size is the Omega Speedmaster Professional Mark II Racing ST145.014RACING?
- The Omega Speedmaster Professional Mark II Racing ST145.014RACING has a 41.75 mm case, 14.55 mm thick.
- What movement does the Omega Speedmaster Professional Mark II Racing ST145.014RACING use?
- It uses the manual caliber 861.
- How water resistant is the Omega Speedmaster Professional Mark II Racing ST145.014RACING?
- It is water resistant to 50 metres.
- Is the Omega Speedmaster Professional Mark II Racing ST145.014RACING still in production?
- No. It was made until 1976.
- When did the Omega Speedmaster Professional Mark II Racing ST145.014RACING come out?
- It was introduced in 1969 and made until 1976.
- What is the Omega Speedmaster Professional Mark II Racing ST145.014RACING made of?
- The case is stainless steel. Bracelet or strap: Stainless steel.
Catalog facts checked October 2026.