Omega Speedmaster Reduced 3510.50.00 39mm Circa 2000s

Omega Speedmaster Reduced 3510.50.00

The Omega Speedmaster Reduced 3510.50.00 is one of the most underappreciated watches in the entire Speedmaster family. Smaller than the iconic Moonwatch, powered by a self-winding automatic movement rather than a manual-wind calibre, and produced continuously from 1988 until the late 2000s, the 3510.50.00 was designed to bring the Speedmaster experience to a broader audience. For collectors and enthusiasts who want genuine Speedmaster DNA in a more wearable, less imposing package, it delivers on every count.

The Origins of the Omega Speedmaster Reduced

To understand the Speedmaster Reduced 3510.50.00, it helps to understand the context in which it was created. By the mid-1980s, the Speedmaster Professional Moonwatch had become one of the most recognised watches in the world. Its association with the Apollo missions, its 42mm asymmetric case, and its manually-wound Calibre 861 gave it an unambiguous identity as a professional instrument. But that same identity also made it a specific kind of watch: large, manual-wind, and demanding a level of deliberate engagement from the wearer.

Omega recognised that a significant portion of the market wanted the Speedmaster's aesthetic and heritage without the 42mm case dimensions and the obligation of daily manual winding. The solution was the Speedmaster Reduced, first introduced in 1988 under the original reference ST 175.0032. The 39mm case, twisted lugs, black dial, black tachymeter bezel, and three-subdial layout carried the essential visual identity of the Moonwatch forward, while the self-winding movement and more compact dimensions made it a more practical everyday proposition.

The reference number evolved when Omega updated its coding system in the late 1980s, with the watch becoming known as the 3510.50 and later the full reference 3510.50.00. Despite the reference number change, the watch itself remained substantially consistent in design and purpose throughout its production life, which extended until approximately 2009 when Omega discontinued the Reduced collection entirely.

Case Specifications: 39mm, Twisted Lugs, Hesalite Crystal

The Omega Speedmaster Reduced 3510.50.00 is housed in a 39mm stainless steel case with a lug-to-lug distance of approximately 45mm. These dimensions place it firmly in the compact range for a chronograph, and on most wrists the watch sits with a contained, neat presence that suits both casual and dressed-up contexts equally well.

The case profile is approximately 12mm thick from caseback to the top of the crystal, which is a genuinely slim result for an automatic chronograph with a stacked movement architecture. The twisted lug design is one of the most characterful details carried over from the Moonwatch and gives the 3510.50.00 its visual connection to the broader Speedmaster family. The lugs sweep away from the case in a gentle curve and integrate naturally with both the original bracelet and aftermarket straps.

The caseback on the 3510.50.00 is a snap-on design, in contrast to the screw-down caseback of the Speedmaster Professional. It features the Omega seahorse (hippocampus) engraving. Water resistance is rated to 30 metres, which reflects the watch's positioning as a casual and dress-oriented sporting watch rather than a professional diving or field instrument. Buyers should be aware of this specification and treat the watch accordingly.

The crystal fitted to all standard 3510.50.00 production examples is Hesalite, the branded plexiglass material that has been associated with the Speedmaster since the earliest references. Hesalite scratches more readily than sapphire but can be polished back to clarity and has a distinctive, slightly warm optical quality that many enthusiasts prefer to the harder, colder look of sapphire. Later production variants, most notably the subsequent reference 3539.50.00 introduced in 2006, transitioned to sapphire crystal, but the 3510.50.00 retained Hesalite throughout its run, which is considered part of its authentic Speedmaster character.

The Tachymeter Bezel: Function and Iconography

The Omega Speedmaster Reduced 3510.50.00 was produced exclusively with a black tachymeter bezel, fitted with an anodised aluminium insert. This is the only bezel variant ever offered on the 3510.50.00, consistent with the broader Speedmaster Reduced range, and it is one of the most direct visual links to the Moonwatch.

The tachymeter scale allows the wearer to calculate speed over a known distance using the chronograph function. At a practical level, this means measuring the time taken to cover one unit of distance (one kilometre or one mile) and reading the corresponding speed directly from the bezel scale. The scale covers speeds from 60 to 500 units per hour, sufficient for road, track, and aviation timing applications.

There are subtle differences between the tachymeter typography on the 3510.50.00 and that of the Speedmaster Professional that knowledgeable collectors notice. The letter E in the word TACHYMETRE does not carry an accent grave on the Reduced, and the numeral 1 on the scale features a small serif hook at the top rather than the plain vertical line used on the Professional. The overall spacing of the scale markings also differs slightly between the two references. These are details that matter to completists assembling a cross-reference Speedmaster collection.

The aluminium bezel insert on the 3510.50.00 is subject to wear and fading over time. Original, intact inserts in good condition are an important element of the watch's originality value, and examples with replaced or damaged inserts are valued lower by discerning buyers.

The Dial: Black, Three-Register, and the Tritium Patina Question

The standard Omega Speedmaster Reduced 3510.50.00 dial is black, with three subdials arranged at 3, 6, and 9 o'clock. This layout is a direct consequence of the modular movement architecture and is one of the visual points of distinction from the Speedmaster Professional, which positions its subdials at 3, 6, and 9 in a similar arrangement but with slightly different proportions owing to the different case diameter. The word AUTOMATIC appears on the dial beneath SPEEDMASTER, clearly differentiating this reference from the manually-wound Professional.

Hour markers are applied indices, and the hands and markers carry luminous material. On earlier examples produced from 1988 into the mid-1990s, this material is tritium, the mildly radioactive lume compound used across the Swiss watch industry until it was phased out in favour of non-radioactive alternatives. As tritium ages, it develops a characteristic warm patina, ranging from creamy ivory through to a deeper orange or amber tone that collectors often describe as a pumpkin dial effect on the most heavily patinated examples.

This tritium patina is now considered a highly desirable ageing characteristic on the 3510.50.00. Each dial ages differently: the density and colour of the patina varies with the specific example's exposure history, storage conditions, and production date. A well-developed, even tritium patina adds considerable character and collector appeal to an early 3510.50.00, in much the same way that tritium patina is prized on vintage Rolex sports watches. Later examples from the late 1990s onward carry Omega's updated luminous compound, which does not develop the same warm patina over time.

The dial of the 3510.50.00 does not include a date complication, keeping the layout clean and consistent with the original Speedmaster Professional design philosophy. This is one of the reference's most appealing characteristics for collectors who prefer an uninterrupted dial without a date window.

The Movement: ETA 2892-A2 Base and the Calibre Progression

The movement powering the Omega Speedmaster Reduced 3510.50.00 underwent several designation changes across the production life of the reference, which has caused some confusion among collectors. In technical terms, however, the architecture remained substantially consistent throughout: an ETA 2892-A2 base movement fitted with a Dubois-Depraz 2020 chronograph module mounted on the dial side.

This stacked, modular construction is an important technical detail that explains several of the watch's physical characteristics. Because the chronograph module sits on top of the base movement rather than being integrated into it, the chronograph pushers are not aligned with the winding crown. The offset pushers are an immediately identifiable visual signature of the 3510.50.00 and a quick way of confirming the movement architecture at a glance.

Calibre Designations by Production Period

The calibre designations across the 3510.50.00's production life are as follows. From 1988, the movement was designated Calibre 1140, assembled with a gold-plated movement finish. In 1996, the designation changed to Calibre 1141, with the movement assembly changing to rhodium plating while the fundamental architecture remained the same. In 1997, the calibre became the 1143, introducing the updated ETA 2892-A2 base while retaining the Dubois-Depraz 2020 chronograph module. From approximately 2000 onward, the movement was designated Calibre 3220, again based on the ETA 2892-A2 with the Dubois-Depraz 2020, with the changes described as primarily cosmetic. The Calibre 3220 designation is the most commonly encountered on the 3510.50.00 and the one most frequently cited in Omega documentation for this reference.

ETA 2892-A2 and Dubois-Depraz 2020: The Architecture

The ETA 2892-A2 is one of the most widely used and highly regarded base movements in Swiss watchmaking. It operates at 28,800 vibrations per hour, offers a power reserve of approximately 42 hours, and is known for its reliability, serviceability, and consistent accuracy. As a base for a chronograph module, it provides a stable and proven foundation.

The Dubois-Depraz 2020 chronograph module adds the chronograph functionality on top of the base movement. The module is column-wheel controlled, which provides a smooth and precise actuation feel when operating the pushers. The combined assembly powers a 12-hour chronograph with a central seconds hand, a 30-minute counter at 3 o'clock, a 12-hour counter at 6 o'clock, and a running seconds subdial at 9 o'clock. Power reserve for the complete assembly is approximately 40 to 42 hours.

From a servicing perspective, the modular architecture is straightforward for experienced watchmakers. Parts availability for the ETA 2892-A2 base is excellent, and the Dubois-Depraz module is well-documented. Owners can expect routine service intervals of approximately five to eight years under normal use conditions.

Speedmaster Reduced 3510.50.00 vs Speedmaster Professional: Key Differences

The comparison between the Speedmaster Reduced 3510.50.00 and the Speedmaster Professional Moonwatch is the defining question for most prospective buyers, and it is worth addressing directly and accurately.

The 3510.50.00 measures 39mm in diameter against the Moonwatch's 42mm asymmetric case. The Reduced uses a self-winding automatic movement; the Moonwatch uses a manually-wound movement requiring daily winding. The 3510.50.00 caseback is snap-on; the Moonwatch's is screw-down. Both references use Hesalite crystal in standard production form. The Moonwatch carries no date; neither does the 3510.50.00. Water resistance is 30 metres on the Reduced against the Moonwatch's 50 metres.

In terms of heritage, the Moonwatch's direct role in the Apollo programme gives it an unmatched narrative. The Reduced does not carry that specific history, but it carries the same visual language, the same tachymeter bezel format, and the same fundamental design DNA. For wearers who find 42mm too large for daily use, or who prefer the convenience of automatic winding, the 3510.50.00 is the most authentic Speedmaster alternative.

The price difference between the two is also significant. The Speedmaster Professional commands a substantial premium, both new and in the pre-owned market, driven by its NASA heritage and global name recognition. The 3510.50.00 can be found at a fraction of the price, offering exceptional value for buyers who prioritise wearability and daily use over collectible cachet.

Production History and Notable Variants

The Speedmaster Reduced in the 3510.50.00 configuration was produced from the late 1980s until approximately 2009, when Omega discontinued the Reduced collection. Over this period, the reference remained visually consistent while the movement progressed through four calibre designations as detailed above.

Omega also produced a range of dial and case variations on the broader Speedmaster Reduced platform during this period, including examples with gold bezels, mother-of-pearl dials, coloured dials, and precious metal cases. These variants fall outside the core 3510.50.00 specification and are distinct collector propositions in their own right. The standard black dial, steel case, black tachymeter bezel configuration of the 3510.50.00 is the reference that most directly echoes the Moonwatch aesthetic and the one that commands the broadest collector interest.

In 2006, Omega introduced the reference 3539.50.00 as an updated version of the Reduced, featuring a sapphire crystal and a slightly revised dial layout. This reference represents the final evolution of the Reduced line before discontinuation. For collectors, the earlier Hesalite-crystal 3510.50.00 with tritium dial is generally considered the more authentic and characterful of the two.

Omega Speedmaster Reduced 3510.50.00 Collector Demand and Market Value

The Omega Speedmaster Reduced 3510.50.00 occupies an interesting position in the current collector market. It has historically been undervalued relative to the Speedmaster Professional, and many examples can still be found at accessible price points. This accessibility is part of its appeal for entry-level collectors or for those who want a capable, daily-wear chronograph without committing to Moonwatch pricing.

Within the 3510.50.00 collector community, the most sought-after examples are early production pieces with Calibre 1140 movements and tritium dials showing well-developed patina. The warm, organic ageing of the tritium lume on the earliest examples gives these watches a visual richness that later SuperLuminova dials cannot replicate, and it is increasingly recognised as one of the most compelling arguments for seeking out an early example specifically.

Condition and originality drive value, as with any collectable vintage or transitional-era watch. Unpolished cases with crisp lug definition, original bezel inserts without damage or replacement, and original bracelets or straps with appropriate age-consistent wear are all positive factors. Dials that have not been cleaned, refinished, or had their lume plots replaced are essential for a correct example. Service history and original box and papers add meaningful value, particularly for later examples where documentation is more likely to be available.

The 3510.50.00 is also notable as a gateway reference into Speedmaster collecting more broadly. Many serious Speedmaster collectors hold an example alongside a Professional as a deliberate demonstration of the breadth of the Speedmaster family. For this reason, as awareness of the Reduced's role in the Speedmaster story grows, so does the ceiling of collector interest and secondary market pricing.

Why the Omega Speedmaster Reduced 3510.50.00 Is Worth Serious Consideration

The Omega Speedmaster Reduced 3510.50.00 makes a compelling case across several dimensions simultaneously. As a watch to be worn, it is highly practical: the 39mm case sits comfortably on a wide range of wrist sizes, the automatic movement requires no daily winding, the Hesalite crystal can be polished if scratched, and the ETA 2892-A2 base is one of the most thoroughly supported movements in the Swiss service network. It is a watch that can genuinely be worn every day without anxiety.

As a collector piece, it offers a direct link to one of the most storied watch families in history at a price point that the Moonwatch has long since left behind. Early tritium examples with developed patina are becoming more difficult to find in honest, unrestored condition, and the trajectory of collector appreciation for this reference appears to be upward.

For anyone drawn to the Speedmaster story but seeking something more wearable, more accessible, or simply different from the ubiquitous Professional, the 3510.50.00 is the answer Omega built for exactly that purpose. It is not a compromise. It is a distinct and considered interpretation of the Speedmaster brief, and it rewards the attention of buyers who look past the Moonwatch's shadow.

Frequently Asked Questions: Omega Speedmaster Reduced 3510.50.00

What is the Omega Speedmaster Reduced 3510.50.00?

The 3510.50.00 is a 39mm automatic chronograph from Omega's Speedmaster family, produced from 1988 until approximately 2009. It was designed to offer the Speedmaster aesthetic and functionality in a more compact, self-winding format than the manually-wound Speedmaster Professional Moonwatch.

What movement does the Omega Speedmaster Reduced 3510.50.00 use?

The 3510.50.00 uses an ETA 2892-A2 base movement fitted with a Dubois-Depraz 2020 chronograph module. Omega designated this assembly as Calibre 1140 (from 1988), Calibre 1141 (from 1996), Calibre 1143 (from 1997), and Calibre 3220 (from approximately 2000). The architecture remained consistent across all four designations.

How does the Speedmaster Reduced 3510.50.00 differ from the Speedmaster Professional Moonwatch?

The Reduced is smaller (39mm vs 42mm), uses a self-winding automatic movement rather than a manual-wind calibre, has a snap-on caseback rather than a screw-down, and is water resistant to 30 metres versus 50 metres on the Professional. Both watches use Hesalite crystal in standard form, have no date complication, and share the same fundamental black dial and tachymeter bezel design language.

What crystal does the Omega Speedmaster Reduced 3510.50.00 have?

The 3510.50.00 uses a Hesalite (plexiglass) crystal throughout its production run. This is consistent with the Speedmaster Professional and is part of the watch's authentic Speedmaster character. The subsequent reference 3539.50.00, introduced in 2006, switched to sapphire crystal.

Does the Omega Speedmaster Reduced 3510.50.00 have a date complication?

No. The 3510.50.00 has no date complication, giving it a clean, uninterrupted dial layout. The date-equipped Speedmaster Reduced variants used a different movement architecture based on the Valjoux 7750 and carry different reference numbers.

What is the tritium dial patina on the Speedmaster Reduced 3510.50.00?

Earlier examples produced from 1988 into the mid-1990s use tritium luminous material on the hands and hour markers. Over time, tritium develops a warm ivory-to-amber patina that is now considered a desirable ageing characteristic. The most heavily patinated examples are sometimes described as pumpkin dials. This patina is unique to each individual watch and is one of the strongest arguments for seeking out an early production 3510.50.00 specifically.

What should I look for when buying an Omega Speedmaster Reduced 3510.50.00?

Prioritise unpolished cases with sharp lug edges, original bezel inserts without replacement or heavy damage, dials in original condition with no cleaning or lume replacement, and bracelets or straps with age-appropriate wear. For early examples, check that the luminous material shows genuine tritium patina consistent with the production period. Original box and papers add value and assist with dating the example accurately.

• Case in good condition 
• Light hairlines visible
• Bracelet in great condition

• Dial and hands in excellent condition.
• Crystal is in very good condition with small hairline scratches visible.