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The Tudor Pelagos Blue 25600TB is a serious, large-format dive watch whose strongest reasons to buy are its 500 m rating, approximately 70-hour COSC-certified movement and unusually complete factory strap package. Its 42 mm case, 14.3 mm thickness and bright blue color create the main compromises: substantial wrist presence and less visual discretion than the black Pelagos. The legacy reference is commonly written as 25600TB; Tudor’s current official product page identifies the watch as M25600TB-0001.
The specifications below come from Tudor, while the comments about the blue color and expanded dial printing are clearly identified as observations from two 2015 published reviews. They are not a substitute for a current physical test or a guarantee that the watch suits every wrist.
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What exactly is the Tudor Pelagos 25600TB?
The blue Pelagos was launched under the reference 25600TB. Tudor’s current product page uses the full SKU M25600TB-0001, so a listing using either designation may be describing the same blue 42 mm Pelagos generation. When buying, match the complete current SKU, case and bracelet details rather than relying on a seller’s shortened title.
The watch is a professional-style mechanical diver in a satin-finished titanium-and-steel case. It combines a blue dial, blue ceramic bezel insert, date display and helium escape valve with Tudor’s manufacture Calibre MT5612. The package is unusually broad for a factory diver: a titanium bracelet is supplied, and Tudor also includes a blue rubber strap, buckle and an additional extension piece.
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| Specification | Published detail | Source and qualification |
|---|---|---|
| Current reference | M25600TB-0001 | Tudor current product page, accessed 8 October 2026 |
| Historical reference | 25600TB | Tudor 2015 press materials |
| Case | 42 mm, titanium and steel, satin finished | Tudor current product page |
| Thickness | 14.3 mm | Tudor current product page |
| Lug width | 22 mm | Tudor current product page |
| Water resistance | 500 m / 1,640 ft | Tudor current product page and 2015 press materials |
| Movement | Manufacture Calibre MT5612, COSC-certified, self-winding | Tudor current product page |
| Power reserve | Approximately 70 hours | Tudor current product page and 2015 press materials |
| Crystal | Sapphire | Tudor current product page |
| Bezel | Unidirectional titanium bezel with matte blue ceramic insert | Tudor current product page |
| Dial | Blue, white indices, date at 3 o’clock | Tudor current product page |
| Bracelet and strap | Titanium bracelet; blue rubber strap with buckle and extra extension piece | Tudor current product page |
These are manufacturer specifications, not measurements made by this publication.
How do the 42 mm dimensions translate to wrist fit?
At 42 mm wide and 14.3 mm thick, the blue Pelagos has an assertive profile. The 22 mm lug width keeps the bracelet and strap visually proportional, while the satin finish reduces the mirror-like glare associated with highly polished cases. Diameter alone cannot predict comfort: lug shape, wrist circumference, wrist flatness and personal tolerance for thickness all matter.
Who is likely to enjoy the size?
Readers who prefer modern tool watches, broad dive bezels or a watch that remains legible at a distance will probably appreciate the scale. The case gives the blue dial and minute markings room to breathe, and the titanium construction is intended as the lightweight metal element in the mixed case design. Tudor does not publish a universal wrist-size recommendation, so a 42 mm case should not be treated as automatically suitable or unsuitable for a particular measurement.
How should a smaller wrist assess it?
Try the watch with the bracelet adjusted and with the rubber strap installed if possible. Check whether the lugs extend beyond the wrist’s edges, whether the 14.3 mm case catches on sleeves and whether the clasp sits centrally underneath. A mirror, side photograph or a paper 42 mm template can reveal overhang, but an in-person fitting remains the most reliable way to judge the combination of diameter and thickness.
What does the mixed titanium-and-steel construction mean?
Tudor specifies a titanium-and-steel case and a titanium bracelet with a steel folding clasp. The satin treatment reinforces the instrument-watch character and is less formal than a fully polished finish. No published weight figure is supplied here, so claims about the exact weight advantage over a steel diver would be speculation.
What movement powers the blue Pelagos?
Calibre MT5612 is Tudor’s COSC-certified, self-winding manufacture movement. Tudor states an approximate 70-hour power reserve, and the 2015 Fratello review also records a silicon hairspring and the replacement of the earlier ETA movement by MT5612. The reserve is close to three days, which is useful if the watch is removed for a weekend and restarted before the reserve is exhausted.
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COSC certification describes the movement’s testing standard; it is not a promise that every cased watch will show identical daily accuracy in every position or temperature. No independent accuracy measurement is available for this article. The practical buying question is whether the long reserve, manufacture calibre and certification justify choosing the Pelagos over a simpler movement in another diver.
What are the blue dial, bezel and display details?
The dial is blue with white indices and a date window at 3 o’clock. A sapphire crystal covers it, while the unidirectional titanium bezel carries a matte blue ceramic insert. The helium escape valve is positioned at 9 o’clock, preserving the familiar left-side profile of the Pelagos case.
Felix Scholz at Time+Tide described the blue as bright or azure and more conspicuous than the black model, a useful warning for buyers seeking a discreet everyday watch. Robert-Jan Broer at Fratello likewise wrote that the blue version stands out more than black. Both pieces are dated 2015 opinions, not a current survey of owners.
The updated model added more dial wording, including Pelagos and COSC references. Broer noted that enthusiasts disagreed about whether the extra text improved the watch or made the dial feel busier. That is a genuine preference issue: buyers who favor a sparse dial should inspect photographs at full size, while those who like explicit specification text may see the lettering as part of the technical identity.
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What is included in the box?
Tudor’s current configuration includes both a titanium bracelet and a blue rubber strap. The official specification says: Complimentary blue rubber strap with buckle and extra extension piece supplied with watch.
That means the rubber option is not an aftermarket substitute; it is part of the stated factory package for M25600TB-0001.
How does the bracelet adjust for diving?
The bracelet has an extension system, and Tudor’s 2015 press materials describe a steel folding clasp with a unique auto-adjustable spring mechanism developed and patented by Tudor. The mechanism is intended to accommodate changes in fit over a wetsuit or during normal wrist swelling, but the available data does not provide a quantified adjustment range. Confirm that the clasp and extension components are present when inspecting a pre-owned example.
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Is the supplied rubber strap a better everyday choice?
Rubber reduces the formality of the titanium bracelet and can be preferable around water or in hot weather. It also changes the visual balance: the same blue that makes the watch distinctive becomes more prominent when the bracelet’s neutral metal is removed. The supplied buckle and extra extension piece make the factory strap a more complete option than a bare replacement strap.
How capable is the Pelagos as a dive watch?
Tudor rates the watch to 500 m (1,640 ft), with a unidirectional bezel, sapphire crystal, bracelet extension and helium escape valve. Those are substantial manufacturer specifications for a recreational or professional-style diver. The depth rating is a design specification, not evidence that this particular watch was independently pressure-tested by this publication or that any dive profile is automatically appropriate.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallA unidirectional bezel is designed so an accidental movement can indicate less remaining time rather than more, but correct use still depends on aligning the marker before descent and monitoring the bezel during the dive. The helium valve is relevant to saturation-diving decompression; it is not a feature most recreational divers will need to operate. Follow Tudor’s instructions and the rules of the dive operator rather than treating the rating as a substitute for equipment training or inspection.
How does the blue Pelagos compare with the black Pelagos?
The documented difference is primarily visual. The 2015 Time+Tide and Fratello reviews both characterized blue as more eye-catching, while black was treated as the quieter, more discreet choice. The current Tudor site lists black Pelagos variants, but the cited material does not establish that every black reference shares every dimension, movement or bracelet detail of M25600TB-0001.
| Decision point | Blue 25600TB / M25600TB-0001 | Black Pelagos |
|---|---|---|
| Color | Blue dial and blue ceramic bezel insert | Black versions are listed by Tudor; exact reference-dependent configuration should be checked |
| Visual presence | 2015 reviewers described it as bright, conspicuous and more noticeable | 2015 reviewers described black as more discreet |
| Dial printing | Expanded wording drew mixed enthusiast reactions in the 2015 reviews | Do not assume identical text without checking the exact reference |
| Technical specification | Use the M25600TB-0001 specification table above | Compare the specific black SKU; dimensions and equipment are not established here |
| Best fit for a wardrobe | Works when a strong color accent is welcome | Usually easier to keep visually neutral, according to the dated reviewer impressions |
Color is therefore the deciding factor more than a documented mechanical difference. If the watch must disappear under a cuff or work with formal clothing, black is the safer visual choice. If the purpose is to make the diver’s identity obvious, blue has the stronger personality.
How does it relate to Pelagos 39, Pelagos Ultra and other Tudor divers?
Tudor’s current catalog shows the Pelagos 39, Pelagos Ultra and other Pelagos variants alongside the blue M25600TB-0001. They are separate products, not smaller or larger cases that automatically share the blue model’s movement, water resistance, bezel, bracelet or strap package.
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| Model choice | What can be established from the cited material | What must be verified before buying |
|---|---|---|
| Pelagos Blue M25600TB-0001 | 42 mm case, 14.3 mm thick, 500 m rating, MT5612 and supplied blue rubber strap | Local price, stock and exact warranty terms |
| Pelagos 39 | Current Tudor page lists it as a Pelagos model | Case dimensions, movement, water resistance, materials and package for the exact SKU |
| Pelagos Ultra | Current Tudor page lists it as a Pelagos model | All technical specifications and price for the exact SKU |
| Black Pelagos | Current Tudor page lists black variants; 2015 reviewers treated black as the discreet color alternative | Reference-specific dimensions, movement, bracelet and current price |
Launch-era articles also discussed the blue Pelagos alongside the Rolex Submariner and Tudor Black Bay. Those were editorial comparisons from 2015, not controlled head-to-head tests and not a basis for current price or value claims. A buyer should compare the exact contemporary references, warranty terms and fit rather than assuming a family resemblance means equivalent specifications.
What does the Tudor Pelagos Blue cost?
The European Tudor page accessed on 8 October 2026 displayed a suggested retail price of €5,560 for M25600TB-0001. That is a market-specific, time-sensitive manufacturer price; Tudor reserves the right to change prices and models, and the euro figure should not be generalized to other countries.
Tudor’s 2015 press materials listed CHF 4,200 including VAT for the 25600TB in Switzerland. That is a historical launch-era price, not a current secondary-market value or a conversion of the 2026 European price. The Time+Tide review also reported CHF 4,200 and July availability in its 2015 launch context.
No current transaction data, verified Amazon listing, stock report or dealer discount is established here. For a new watch, use Tudor’s official retailer locator and compare the written invoice, country of sale and warranty documentation. For a pre-owned example, condition and completeness can change the value more than a seller’s use of the reference number alone.
What guarantee does Tudor state?
Tudor’s current product page states a five-year transferable guarantee with no registration or periodic maintenance checks required. The wording is Tudor’s current manufacturer policy; the applicable exclusions, regional consumer rights and service process can vary by market, so obtain the terms that accompany the watch in the country of purchase.
Transferability is particularly relevant to a pre-owned buyer. Ask for the original warranty documentation and ensure the serial number, seller paperwork and watch correspond. A seller’s statement that a guarantee is transferable is not enough if the documents or regional conditions cannot be verified.
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What should you check before buying a 25600TB?
- Confirm the identity. Match the caseback, warranty card and listing to the current SKU M25600TB-0001 or the historical 25600TB designation. Be cautious when a listing uses only “Pelagos blue” without a reference.
- Check the configuration. A complete factory set should account for the titanium bracelet, bracelet extension, blue rubber strap, buckle and extra extension piece described by Tudor.
- Inspect condition. Look for photographs of the bezel insert, sapphire crystal, clasp, bracelet links, crown and helium valve. Ask whether any component has been replaced and whether replacement parts are Tudor components.
- Verify the seller. For a new watch, use an official Tudor retailer or a reputable specialist. For pre-owned stock, verify the business identity, return policy, authenticity process and jurisdiction before sending payment.
- Confirm the market and price. Compare prices in the same currency and tax treatment. Do not use the historical Swiss launch price as a current bargain benchmark.
- Assess fit. Try the 42 mm case on a wrist, check lug overhang and test both bracelet and rubber configurations if possible.
- Read the guarantee terms. Confirm the guarantee start date, transfer documentation and any market-specific conditions directly with Tudor or the authorized retailer.
Can you fit any 22 mm replacement strap?
The 22 mm lug width makes replacement searching easier, but it does not prove that every generic 22 mm strap will fit the case or clasp correctly. End-link shape, spring-bar clearance, strap thickness, buckle dimensions and the interaction with Tudor’s extension system all matter.
Before buying an aftermarket strap, obtain the manufacturer’s compatibility statement or measure the end and spring-bar area against the watch. A strap that measures 22 mm at the lugs may still leave gaps, foul the case or require a different buckle. The supplied Tudor rubber strap is the only strap explicitly documented as part of this configuration.
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Advantages
- High stated water resistance and a purpose-built diver layout.
- Manufacture MT5612 movement with COSC certification and a long stated reserve.
- Both titanium bracelet and blue rubber strap supplied from the factory.
- Distinctive blue color and ceramic bezel for buyers who want a visible technical watch.
- Current Tudor policy states a transferable five-year guarantee.
Compromises
- The 42 mm by 14.3 mm format may dominate a smaller or flatter wrist.
- Blue is less discreet than black, according to the dated published reviewer impressions.
- The expanded dial text is a matter of taste and may look busy to minimalist buyers.
- Exact comparisons with Pelagos 39, Pelagos Ultra and black references require checking each SKU rather than assuming shared specifications.
- There is no established current secondary-market price or verified third-party strap fit in the available evidence.
Is the Tudor Pelagos Blue 25600TB worth buying?
The blue Pelagos makes the most sense for someone who wants a technically specified, large dive watch and values the flexibility of receiving both bracelet and rubber strap. The long power reserve, COSC-certified manufacture movement and 500 m rating give it a strong functional brief, while the bright blue execution makes it more expressive than the black alternative.
It is a weaker choice for a buyer seeking a discreet office watch, a compact diver or a watch whose fit can be predicted from diameter alone. The right decision depends on trying the case, accepting the visual prominence and verifying the exact reference and package. Treat the 2015 color commentary as useful historical context, and treat Tudor’s current page as the authority for the SKU, specifications, price shown in your market and guarantee terms.
Frequently Asked Questions
Is the 25600TB discontinued or merely renamed?
The older 25600TB designation appears in Tudor’s 2015 launch material, while the current official page identifies the blue watch as M25600TB-0001. That change in reference format does not, by itself, establish a discontinuation date; verify the exact SKU with Tudor or an authorized retailer.
Can I swim with a watch rated to 500 metres?
The 500 m figure is Tudor’s water-resistance specification, not a personal dive plan or a substitute for pressure checks. Follow the crown, bezel and strap instructions and the procedures of the dive operator, and have the watch inspected according to Tudor’s guidance before relying on it for serious diving.
How often does the MT5612 need servicing?
The cited product information does not provide a service interval or service-price estimate. Ask Tudor or an authorized service center for the interval and conditions that apply in your country rather than relying on a generic mechanical-watch schedule.
Will the Tudor rubber strap fit a black Pelagos?
Compatibility depends on the exact black reference, case geometry, end shape and clasp arrangement. The blue strap is documented for M25600TB-0001, but that evidence does not guarantee fit on every other Pelagos model.
