Omega Speedmaster
Most Omega Speedmaster references take a 18 mm watch strap: 1 of 3.
Omega Speedmaster lug width by case size
3 references measured. Updated 2026-11-10.
| Case | Lug width | References | Watch strap attachment | For example |
|---|---|---|---|---|
| 35 mm | 20 mm | 1 | — | 105.012 |
| not recorded | 18 mm · 19 mm on 1 | 2 | — | 1991-DA-375-0043 |
References that take a different watch strap
- 105.003: 19 mm
Other Omega families
Inside each one the lug width often changes: it is the reference that decides.
- Constellation 945
- De Ville 754
- Aqua Terra 584
- Seamaster Diver 300M 272
- Seamaster Planet Ocean 242
- Speedmaster (Non-Moonwatch) 196
- Speedmaster Moonwatch 163
- LadyMatic 103
- Trésor 99
- Museum Collection 64
- Speedmaster Broad Arrow 45
- Speedmaster Reduced 45
All Omega families → · Why the size changes inside a family →