Omega X-33 / Z-33
Most Omega X-33 / Z-33 references take a 20 mm watch strap: 19 of 21.
Omega X-33 / Z-33 lug width by case size
21 references measured. Updated 2026-10-29.
| Case | Lug width | References | Watch strap attachment | For example |
|---|---|---|---|---|
| 42 mm | 20 mm | 13 | — | 318.90.42.79.01.001, 318.92.42.79.01.001, 3229.50.06 |
| 43 mm | 20 mm · 21 mm on 1 · 22 mm on 1 | 3 | — | 325.90.43.79.01.001 |
| 45 mm | 20 mm | 4 | — | 318.90.45.79.01.001, 318.90.45.79.01.003, 318.92.45.79.01.001 |
| 47 mm | 20 mm | 1 | — | 216.92.46.73.10.001 |
References that take a different watch strap
- 325.92.43.79.01.001: 21 mm, not the 20 mm of most 43 mm cases
- 325.92.43.79.01.002: 22 mm, not the 20 mm of most 43 mm cases
Every Omega X-33 / Z-33 reference
- 20 mmSeamaster Regatta 37th America's Cup216.92.46.73.10.001
- Speedmaster X-33 Titanium / Bracelet / Military318.90.42.79.01.001
20 mm - Skywalker X-33 Titanium / Black / Bracelet318.90.45.79.01.001
20 mm - Speedmaster X-33 Marstimer Titanium / Black / Bracelet318.90.45.79.01.003
20 mm - Speedmaster X-33 Titanium / Kevlar / Military318.92.42.79.01.001
20 mm - Skywalker X-33 Regatta ETNZ318.92.45.79.01.001
20 mm - Skywalker X-33 Titanium / Blue / Nato / Solar Impulse318.92.45.79.03.001
20 mm - Speedmaster X-33 Special Team Edition America’s Cup3229.50.06
20 mm - Spacemaster Z-33 Titanium / Black / Bracelet325.90.43.79.01.001
20 mm - Spacemaster Z-33 Titanium / Black / Rubber325.92.43.79.01.001
21 mm - Spacemaster Z-33 Titanium / Black / Leather325.92.43.79.01.002
22 mm - Speedmaster X-33 Titanium / Black / Bracelet3290.50.00
20 mm - Speedmaster X-33 Titanium / Bracelet / 2nd Gen3291.50.00
20 mm - Speedmaster X-33 Titanium / Bracelet / Pilot3291.52.00
20 mm - Speedmaster X-33 Titanium / Black Kevlar3990.50.06
20 mm - Speedmaster X-33 Titanium / Black Kevlar - Folding Clasp3990.50.36
20 mm - Speedmaster X-33 Titanium / Red Kevlar3990.50.41
20 mm - Speedmaster X-33 Titanium / Red Kevlar - Folding Clasp3990.50.43
20 mm - Speedmaster X-33 Titanium / Black Kevlar / 2nd Gen3991.50.06
20 mm - Speedmaster X-33 Titanium / Green Kevlar / 2nd Gen3991.50.09
20 mm - Speedmaster X-33 Titanium / Red Kevlar / 2nd Gen3991.50.41
20 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 →