Short answer: The Omega Speedmaster X-33 is a quartz-powered analogue-digital watch family built around timekeeping, alarms, chronograph and countdown functions, and mission timing. The family includes two early Professional versions, the Skywalker, and the Mars-focused Marstimer; their functions and documentation differ, so buyers should verify the exact reference and condition.
For a pre-owned X-33, confirm the reference from documentation and the watch itself, ask for operating demonstrations and service records, and check fit and included parts. Available research does not establish current market prices, stock, or service costs.
What is the Omega Speedmaster X-33?
The Speedmaster X-33 is an analogue-digital quartz member of the Speedmaster family. Its combination of hands and an LCD supports ordinary time display alongside alarms, chronograph or countdown timing, calendar features, and mission timing. The exact functions vary by reference.
It is distinct from the mechanical Moonwatch: the X-33 is designed around multifunction quartz timekeeping rather than the Moonwatch’s mechanical chronograph architecture.
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The X-33 family at a glance
| Iteration | Identification | Useful distinction | Evidence caveat |
|---|---|---|---|
| Early X-33 / first generation | Reference 3290.50 | Hybrid display and mission-oriented functions | Historical details are based on Fratello’s specialist account. |
| Modified X-33 / second generation | Reference 3291.50 | Revised exterior and controls, including bezel, pushers, and crown | Fratello dates it to 2001 and reports it was discontinued for public sale. |
| Skywalker | Reference 318.90.45.79.01.001 | Mission elapsed time, phase elapsed time, multiple time references, alarms, and other timing functions | Omega supplies product specifications; ESA documents its collaboration and testing. |
| Marstimer | Mars-focused X-33 iteration | Adds Mars-oriented time functions | Fratello’s historical account dates it to 2022. Confirm regional specifications and availability directly. |
First and second generations
Fratello’s specialist history dates the first-generation reference 3290.50 to 1998 and describes its hybrid display and mission-oriented functions. The second-generation reference 3291.50 is dated to 2001 in the same account. It retained the early X-33 concept while revising exterior and control details such as the brushed bezel, pushers, and crown.
These historical descriptions do not establish the condition or originality of any individual pre-owned watch. Inspect the exact example and request service documentation rather than relying on a seller’s generation label.
Skywalker: mission timing and ESA collaboration
ESA announced the Skywalker in 2014. Omega identifies reference 318.90.45.79.01.001 as a 45 mm titanium watch with a multifunction quartz movement. Omega lists three time zones, chronograph, timer, mission elapsed time, phase elapsed time, three alarms, and perpetual calendar among its functions.
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- Measure the width of your strap in millimeters with a ruler and add 1mm. Suitable for most sports watches
ESA describes the connection to astronaut Jean-François Clervoy’s timing ideas. It reports that the watch can set an event in the past or future to the second and calculate elapsed or remaining time, and notes multiple alarms with different tones. ESA also reports environmental evaluations including vibration, centrifuge, temperature and vacuum, and radiation testing at ESTEC. ESA’s wording is that it tested and qualified the Skywalker for piloted missions; do not generalize this to every X-33 generation or call it a certification without a source.
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ESA explicitly says it is not involved in manufacturing or commercializing the watch. Consult the correct manual for reference-specific operation; available research does not establish exact button sequences.
Marstimer: Mars-focused functions
The Marstimer is the Mars-focused iteration of the X-33. Fratello’s historical account dates it to 2022 and describes its Mars-time additions. Confirm the exact regional product specifications and current availability with Omega or an authorized seller; this research pass did not verify current inventory or a current price.
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- strap width: interface size 18mm, the widest position of the strap is 25.5mm. Length: 135mm / 80mm
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Understanding the timing functions
Mission elapsed time and phase elapsed time
Mission Elapsed Time (MET) refers to timing from a mission start. Phase Elapsed Time (PET) relates to a particular mission phase or event. Omega lists both for the Skywalker. Refer to the manual for the exact programming and display behavior of a specific reference.
Chronograph, countdown, and alarms
A chronograph measures elapsed time, while a countdown timer tracks a selected duration toward zero. The family’s alarm and timing features vary by generation. For the Skywalker, Omega lists chronograph, timer, and three alarms.
Time references
Multiple time references can help coordinate across locations or keep a mission reference separate from local time. Omega lists three time zones for the Skywalker. Do not assume the same menu or feature set across all X-33 versions.
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- [Package Inclusion] 1 Leather Watch Band, 1 Spring bar tool, 1 Quality Control Card.
What to check when buying a pre-owned X-33
- Verify the exact reference and generation. Compare the paperwork, case, and service records; do not rely only on a seller’s label.
- Check fit and proportions. The cited Skywalker reference is 45 mm. Try it on where possible and consider the dimensions of the exact reference.
- Choose by functions. Decide whether you want early mission timing, the Skywalker’s phase elapsed time and multiple time references, or the Marstimer’s Mars-oriented displays.
- Request a clear operating demonstration. Ask the seller to demonstrate the display and functions relevant to that reference, and note any faults or functions that cannot be tested.
- Review service history and condition. Request service documentation and ask an authorized Omega service center for a current estimate if service is needed. This research does not establish present service costs or scope.
- Verify completeness and compatibility. Confirm which parts and documents are included. Check bracelet or strap fit for the exact reference; appearance alone does not establish compatibility.
- Compare like with like. Evaluate current listings by reference, condition, location, and completeness. No current market range was established in this research.
A polished case or a complete set does not substitute for evidence that the watch functions and has been maintained. No personal testing or ownership experience is claimed here.
Choosing among the X-33 versions
The early Professional versions suit buyers interested in the original hybrid mission-timing concept, subject to the condition and service history of the individual watch. The Skywalker adds phase elapsed time and multiple time references, with Omega listing three time zones and three alarms. The Marstimer is the choice for buyers specifically interested in Mars-oriented time functions. No generation can be called the best buy or easiest to service on the available evidence.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.FAQ
Is the Omega Speedmaster X-33 mechanical or quartz?
The X-33 family is quartz-powered. Omega describes the Skywalker as using a multifunction quartz movement.
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What is the difference between MET and PET?
MET refers to time from a mission start; PET relates to a particular mission phase or event. Consult the manual for the reference-specific operation.
Did ESA manufacture the X-33?
No. ESA describes its collaboration and testing, and explicitly states that it is not involved in manufacturing or commercializing the watch.
What should I verify before buying a used X-33?
Confirm the reference, fit, relevant functions, condition, service records, and included parts. For service needs or estimates, contact an authorized Omega service center.
The Bottom Line
The Omega Speedmaster X-33 is a multifunction analogue-digital quartz watch family, not a digital Moonwatch. Its early Professional versions, Skywalker, and Marstimer differ in history and functions. Buyers should identify the precise reference, check the watch’s operation and service history, verify compatibility of included or replacement parts, and compare current listings without relying on unsupported price or availability claims.
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