The Omega Speedmaster Moonwatch is not one unchanged watch. It is a sequence of references that moved from a 1957 racing chronograph to NASA-tested instruments and, finally, to the modern Co‑Axial Master Chronometer Moonwatch. The key breaks are easy to remember: CK2915 began the family, CK2998 established its early space connection, 105.003 passed NASA testing and accompanied Ed White, 105.012 defined the larger lunar-era Professional case, 145.012 was the last Professional with calibre 321, 145.022 introduced calibre 861, the 3590.50 and 3570.50 carried the design into modern production, and the 2021 3861 generation added contemporary certification and anti-magnetic performance.
The reference timeline at a glance
| Reference and years | Case and external design | Calibre | Space association | Best understood as |
|---|---|---|---|---|
| CK2915, 1957–1959 | Approximately 38.6–39.7 mm by variant; straight lugs; tachymeter on the bezel; early broad-arrow styling | 321 | Origin of the Speedmaster line, before NASA qualification | The first-generation collector reference |
| CK2998, 1959–1962 | Symmetrical case, dark bezel and slender Alpha hands | 321 | Wally Schirra wore his privately purchased watch on Sigma 7 on October 3, 1962 | The first strongly space-associated generation |
| 105.003, 1964–1967 | Straight lugs; no crown guards | 321 | Submitted to and qualified by NASA; Ed White wore two during his 1965 EVA | The NASA-test and Ed White reference |
| 105.012, 1964–1968 | 42 mm asymmetrical Professional case with crown guards | 321 | Associated with Buzz Aldrin and the first Moon-landing era | The lunar-era Professional case |
| 145.012, 1967–1968 | Updated 105.012 appearance; changed, screwed-in pushers with larger caps | 321 | Final Professional reference using calibre 321 | The last 321 Professional |
| 145.022, 1968–1988 | Professional case; later dials use a printed Omega logo | 861, 21,600 vph | NASA qualified it for Space Shuttle use in 1978 | The calibre-861 turning point |
| 3590.50 / 3570.50, 1988–2020 era | Modern 42 mm Professional format, with production details changing over time | 861, then 1861 from 1997 | Continuation of the flight-qualified Moonwatch design | The practical late-20th- and early-21st-century bridge |
| 3861 models, 2021–present | 42 mm case; Hesalite or sapphire configurations | Manual-wind Co‑Axial Master Chronometer 3861; 50-hour reserve | Modern Moonwatch with current Omega certification | The contemporary production standard |
| 310.30.42.50.04.001, added 2024 | 42 mm Moonwatch with a white dial | 3861 | White-dial interpretation inspired by space-exploration history | A current-production alternative to the black dial |
Where the Speedmaster began: CK2915
CK2915 (1957–1959)
Reference CK2915 is the origin of the Speedmaster family. Its defining innovation was placing the tachymeter scale on the bezel rather than printing it on the dial, making speed readings easier to use at a glance. Early examples measure approximately 38.6 to 39.7 mm, depending on the CK2915-1, CK2915-2 or CK2915-3 variant, and use Omega’s calibre 321.
Its racing-chronograph purpose matters because the Moonwatch identity came later. CK2915 was not created as a space watch and should not be described as NASA-qualified. Collectors compare individual examples closely because bezel type, hand set, dial details and originality vary between sub-references and surviving watches.
CK2998: the first space-associated generation
CK2998 (1959–1962)
Omega identifies CK2998 as the second Speedmaster generation, first released in 1959. It introduced the visual formula many enthusiasts now associate with early Speedmasters: a symmetrical case, dark bezel and slender Alpha hands.
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Its space connection is specific. Astronaut Walter “Wally” Schirra bought a CK2998 privately and wore it on the Sigma 7 Mercury mission, launched on October 3, 1962. That makes CK2998 an important “first in space” reference, but it is not the same claim as being the first watch worn on the Moon.
The NASA-era references: 105.003, 105.012 and 145.012
105.003: NASA testing and Ed White
Reference 105.003 is the straight-lug, no-crown-guard generation produced from 1964 to 1967. It was submitted for NASA’s chronograph tender and qualified during NASA testing. Ed White wore two 105.003 watches during his 1965 spacewalk, giving this reference a direct connection to the qualification and EVA chapters of the story.
Its geometry is noticeably slimmer-looking than the later Professional case because the crown and pushers are not protected by integrated guards. For a buyer, the correct straight-lug case, period-correct hands and bezel are more important than simply finding a dial marked “Speedmaster.”
105.012: the larger Professional case
Reference 105.012, produced from 1964 to 1968, introduced the 42 mm asymmetrical Professional case with crown guards. Omega’s historical material identifies ST 105.012 with the 1967 Moonwatch, and the reference is associated with Buzz Aldrin and the first Moon-landing era.
When someone asks which Speedmaster was actually worn on the Moon, 105.012 is the reference normally meant for the lunar-era Professional watch. Keep the wording precise: Omega states that the Speedmaster was the first watch worn on the Moon on July 21, 1969, while the surviving historical record distinguishes the specific watches, astronauts and mission equipment involved.
145.012: the final calibre-321 Professional
Reference 145.012 is a visual update of the 105.012. Its most recognizable external changes are the changed, screwed-in pushers and larger pusher caps. Produced from 1967 to 1968, it is the last Professional reference powered by calibre 321.
That status makes 145.012 especially significant: it combines the mature crown-guard case with the hand-finished, column-wheel 321 movement. It is not the same watch as a 105.012, even though the cases can appear very similar in photographs.
145.022 and the calibre-861 break
145.022 (1968–1988)
Reference 145.022 marks the major movement change from calibre 321 to calibre 861. The 861 uses a shuttle-cam chronograph architecture and beats at 21,600 vibrations per hour, replacing the 321-era movement used in the earlier Professional references. Later 145.022 dials also use a printed Omega logo, another useful visual distinction.
The change was an engineering and production decision, not a break with the Moonwatch’s purpose. NASA qualified the 145.022 for Space Shuttle use in 1978, extending the Speedmaster’s operational history beyond the Apollo period.
The 3590.50 and 3570.50 production family
Reference-number change in 1988
Omega changed its reference-number coding in 1988. The 3590.50 succeeded the 145.022, and the closely related 3570.50 became the familiar modern Moonwatch family for many buyers. These watches retain the 42 mm Professional layout and manually wound cam-operated chronograph concept while adding later manufacturing details, bracelets and dial configurations.
Calibre 1861 from 1997
Calibre 1861 became the production movement in 1997 and remained in the Moonwatch until the transition to calibre 3861. In practical terms, the 3590.50 and 3570.50 era is the bridge between collectible vintage references and current production: easier to wear and service than many 1960s examples, but without the Master Chronometer certification of the newest generation.
Whether a 145.022 is “better” than a 3570.50 depends on the question. The 145.022 offers period-correct vintage character and the historical importance of being the first 861 reference. A 3570.50 generally offers a newer case, bracelet and service ecosystem. Condition, originality and documented service matter more than the reference number alone.
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2021–present: 310.30.42.50.01.001 and related references
In 2021 Omega introduced the current 42 mm Moonwatch generation with manually wound Co‑Axial Master Chronometer calibre 3861. Omega rates the movement’s power reserve at 50 hours. Master Chronometer certification brings modern testing for precision, water resistance, power reserve and magnetic resistance, while the familiar hand-wound layout preserves the ritual of the earlier watches.
The main steel decision is crystal: Hesalite on the historically oriented version or sapphire crystal on the display-back configuration. Both use the same basic Moonwatch architecture, but they serve different priorities.
2024 white-dial Moonwatch
Omega added reference 310.30.42.50.04.001 in 2024, a white-dial Moonwatch inspired by space-exploration history. It is a current-production variation rather than a new historical generation, and it uses the 3861 platform.
What each movement changes
| Movement | Where it appears | What changes for the owner |
|---|---|---|
| 321 | CK2915, CK2998, 105.003, 105.012 and 145.012 | Column-wheel chronograph and the defining movement of the early and lunar-era Professional watches |
| 861 | 145.022 and early successors | Shuttle-cam chronograph, 21,600 vph and a production-focused successor to calibre 321 |
| 1861 | 1997–2020 production Moonwatch family | Mature, widely used continuation of the 861 architecture |
| 3861 | 2021–present Moonwatch | Co‑Axial escapement, Master Chronometer certification, modern anti-magnetic testing and a 50-hour power reserve |
Hesalite or sapphire?
Choose Hesalite for historical fidelity
- Hesalite most closely follows the traditional Moonwatch specification.
- It gives the watch the period-appropriate crystal appearance and avoids a visible display back on versions fitted with a solid caseback.
- It can scratch more readily, although light marks can often be polished.
Choose sapphire for scratch resistance and movement viewing
- Sapphire is substantially more resistant to everyday scratching.
- Many sapphire models use a display back, allowing the wearer to see calibre 3861.
- Its reflections and harder, more contemporary appearance are less vintage-like than Hesalite.
Neither crystal makes a 3861 watch historically equivalent to a 105.012 or 145.012. The choice is about daily-use priorities within the modern generation.
How to verify a reference before buying
- Read the complete reference. Confirm whether the watch is a CK2915, CK2998, 105.003, 105.012, 145.012, 145.022, 3590.50, 3570.50 or a 3861-era 310-series model. Similar-looking dials do not establish the reference.
- Match the case geometry. Check straight lugs on 105.003, crown guards on 105.012 and 145.012, and the later Professional case on 145.022 and modern watches.
- Identify the movement. A calibre 321, 861, 1861 or 3861 should agree with the claimed production period. Movement photographs are essential for vintage purchases.
- Inspect hands, bezel and dial printing. Alpha hands and the dark bezel point toward CK2998; later 145.022 examples can be identified by the printed Omega logo. Replacement parts can make a watch look like a different reference.
- Check crystal and caseback. Record whether the watch has Hesalite or sapphire and whether the caseback is period-correct, replaced or engraved.
- Request provenance and service records. Ask for purchase documentation, service invoices, movement photographs and any extract or archive material. A service history supports mechanical confidence but does not prove that every external part is original.
- Have a specialist inspect vintage originality. Case polishing, replacement bezels, relumed dials, changed hands and non-period bracelets materially affect collector value. Individual condition and originality vary too much for a reference number alone to establish authenticity or price.
Which generation fits which buyer?
For the historical collector
CK2915, CK2998, 105.003, 105.012 and 145.012 provide the strongest links to the formative and lunar periods. They demand the most scrutiny because originality, replacement parts and service work differ from watch to watch.
For a vintage-style wearer
A sound 145.022 offers the 861 movement break and late-1960s-to-1980s Professional design without requiring a buyer to pursue the earliest references. A 3590.50 or 3570.50 is a practical continuation when newer production and easier everyday ownership matter.
For a modern daily Moonwatch
The 3861 generation is the straightforward choice. It keeps the manual-wind, three-register Moonwatch identity while adding current certification, anti-magnetic testing and a 50-hour reserve. Select Hesalite or sapphire according to wear and visibility priorities.
How the Moonwatch stayed continuous—and changed
The continuity is visible in the hand-wound chronograph layout, tachymeter bezel and Professional case language. The changes are substantial: calibre 321 gave way to 861 and 1861, then to the Co‑Axial 3861; NASA qualification evolved from Apollo-era testing to modern Master Chronometer certification; and crystals, bracelets, case finishing and manufacturing controls became contemporary.
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That is why “the Moonwatch” can accurately describe both a 1960s 105.012 and a current 3861 model, while still requiring the exact reference to explain what the owner actually has.
Quick Recap
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