Tudor Pelagos History in 7 References

The Tudor Pelagos is one of the more singular achievements in modern dive watch design. Where most brands refined existing blueprints—the Submariner, the Royal Navy diver, the COMEX spec—Tudor started with a clean brief in 2012 and asked what a genuinely technical diving instrument would look like in titanium, at a price that working divers could actually pay. The answer was a full-titanium case, a self-deploying strap extension, a helium escape valve, and a 500-metre rating, all for around $4,000. What followed over the next thirteen years was not a marketing-driven refresh cycle but a disciplined series of upgrades tracking Tudor’s growing manufacture capability and the specific demands of professional dive operations. This is the Pelagos story, told through the seven references that define it.

Contents

1. Ref 25500TN — The Original Diver (2012)
2. Ref 25600TN / 25600TB — The In-House Era (2015)
3. Ref 25610TNL — Left-Hand Drive (2016)
4. Ref 25707B — The FXD and the French Navy (2021)
5. Ref 25407N — The Pelagos 39 (2022)
6. Ref 25717N — The US Navy FXD (2023)
7. Ref M2543C1A7NU-0001 — The Pelagos Ultra (2025)

1. Ref 25500TN — The Original Diver, 2012

Tudor launched the first Pelagos at Baselworld in March 2012, the same show that introduced the first Black Bay. The two watches were intended as complementary pillars: heritage design for the Black Bay, technical diving for the Pelagos. Tudor priced both below CHF 3,000 and positioned them against the grey market rather than the authorised retail list of their competitors.

The Pelagos was the more ambitious of the two technically. Full Grade 2 titanium—not just a titanium bezel or caseback—was unusual at this price in 2012. The 42mm case measured 14.3mm thick with 500m water resistance and a helium escape valve at 9 o’clock for saturation diving operations. A unidirectional ceramic bezel completed the professional specification. What made the bracelet distinctive was the self-deploying extension: a patented mechanism in the clasp that adjusted automatically for wetsuit thickness, eliminating the problem of a loose bracelet underwater.

Under the closed caseback sat a movement that attracted scrutiny: the ETA 2824-2, modified by Tudor with Kif anti-shock balance pivots, proprietary finishing, and a customised rotor. Tudor was transparent about the ETA origin—a sensible decision given that its manufacture calibre programme was still years from completion—and the modification argument was real rather than cosmetic. Power reserve ran to 38 hours, and the original MSRP was approximately $4,000 USD. Production ran from 2012 to 2015. Pre-owned examples of the 25500TN currently trade between $2,800 and $3,800 depending on condition and whether the original bracelet is present.

2. Ref 25600TN / 25600TB — The In-House Era, 2015

Three years after launch, Tudor replaced the ETA movement with its first manufacture calibre for the Pelagos line. The MT5612—produced by Kenissi SA, the movement manufacturer co-owned by Tudor’s parent group—was a 25-jewel automatic beating at 28,800vph with a 70-hour power reserve. The extended reserve was exceptional at the price point, and COSC chronometer certification (warranting accuracy within -4/+6 seconds per day) was a first for any Tudor Pelagos.

The transition brought two new references: the black titanium 25600TN and the 25600TB, which introduced a blue dial and matching blue bezel. The blue version would become the more commercially significant of the two—a colour pairing now synonymous with the modern Pelagos aesthetic. Both dials gained a fifth line of text reading “CERTIFIED CHRONOMETER” beneath the model name, making the in-house generation easy to identify at a glance.

The 25600 series remains in active production in 2026, now at $6,025 for both variants. It is the reference most buyers encounter first when researching the Pelagos, and for the majority it remains the right answer: 500m water resistance, an in-house manufacture movement, full titanium construction, and the self-deploying bracelet extension that is still the most practical wristband engineering in its segment.

3. Ref 25610TNL — Left-Hand Drive, 2016

For left-handed divers and for right-handed divers who prefer to wear a watch on the right wrist, a standard crown at 3 o’clock creates a pressure point against the hand during finning. Tudor addressed this ergonomic problem in 2016 with the Pelagos LHD (Left-Hand Drive), reference 25610TNL. The crown and helium escape valve moved to the 9 o’clock position, and the unidirectional bezel was reconfigured to rotate counterclockwise—the correct direction for a wearer reading time markers from the left-hand side.

The movement was the MT5612-LHD, a mirror-adjusted version of the standard calibre with the crown stem rerouted to accommodate the new crown position. All other specifications remain identical to the 25600TN: 42mm titanium case, 500m water resistance, COSC certification, and 70-hour power reserve. The LHD is not a styling variant—it solves a specific ergonomic problem that matters underwater—and Tudor has kept it in production through the current generation. Current MSRP: $6,025.

4. Ref 25707B — The FXD and the French Navy, 2021

The Pelagos FXD broke with almost everything that had come before. Tudor developed the watch in direct partnership with the Commando Hubert—the French Navy’s elite combat diving unit—and the operational brief was unambiguous: build a diver that cannot be inadvertently dislodged during combat. The result was reference 25707B, a watch with no deployable clasp, no bracelet, and strap bars that are permanently brazed to the case. FXD stands for “fixed”—referring to those fixed strap lugs.

The bezel is a countdown configuration rather than an ISO 6425-compliant elapsed-time bezel. This was a deliberate operational decision: the Commando Hubert typically counts down to a surface window rather than counting elapsed bottom time, and the bezel reflects that. The case measures 42 x 12.75mm—thinner than the main Pelagos—with 200m water resistance and a matte finish that reduces visual signature. Movement is the MT5602, a time-only calibre without date, running to 70 hours reserve.

The original 25707B shipped in blue-on-blue with a NATO-style textile strap and became one of the more talked-about Tudor references of its generation. It demonstrated that military tool-watch credibility could be built through real procurement contracts rather than heritage marketing. A subsequent Red Bull Racing collaboration produced carbon-fibre versions (refs 25707KN and 25807KN) that extended the FXD platform into motorsport. Standard FXD price: $5,025.

5. Ref 25407N — The Pelagos 39, 2022

Tudor launched the Pelagos 39 in August 2022 at a time when market appetite for smaller dive watches had moved from niche preference to mainstream demand. Rather than simply scaling down the existing 42mm case, Tudor engineered the 39 with proportions designed for its size: a narrower bezel, more compact crown guards, and shorter lugs that bring the lug-to-lug distance to approximately 47mm. The result wears comfortably on wrists from around 15cm and suits a suit jacket cuff as readily as a dry suit sleeve.

The movement is the MT5400, a time-only Kenissi calibre without date, with a 70-hour power reserve and COSC certification. Water resistance is rated to 200m—reduced from the 42mm’s 500m but sufficient for recreational and professional recreational diving. The clean dateless dial that this combination produces is the Pelagos 39’s visual signature: more legible and proportionally balanced than the 42mm in formal settings.

Tudor launched the Pelagos 39 at $4,400 USD—a price point that positioned it below the larger Pelagos and attracted buyers who might otherwise have skipped the line entirely. By 2026 the retail price had risen to $5,625, but the Pelagos 39 retains a strong used market following for buyers seeking a compact in-house diver without paying sport-watch premiums.

6. Ref 25717N — The US Navy FXD, 2023

The second major FXD reference arrived in 2023 as a result of a procurement partnership with the United States Navy, following the same model of genuine military contract that produced the original French Navy FXD. Where the 25707B wore a countdown bezel in deference to the Commando Hubert’s operational preference, the US Navy specification required ISO 6425 compliance—meaning a unidirectional elapsed-time bezel. The 25717N delivers this, and the aesthetic consequence is the starkest Pelagos yet: an entirely matte black case, bezel, and dial, with no colour accent beyond the luminous fill on the hands and markers.

The MT5602 movement in the 25717N carries COSC chronometer certification, a step up from the standard FXD’s uncertified calibre. Case dimensions and water resistance (42 x 12.75mm, 200m) remain identical to the 25707B. The 25717N introduced a parallel timeline of FXD variants: the same period saw the FXD Chrono Cycling Edition (ref M25827KN-0001), which uses the MT5813 column-wheel chronograph movement developed in partnership with Breitling. The core 25717N remains the purist choice at $5,025, optimised for function over visual differentiation.

7. Ref M2543C1A7NU-0001 — The Pelagos Ultra, 2025

The Pelagos Ultra, launched in April 2025, is the most technically specified watch Tudor has produced. At 43mm and 14.5mm thick with 1,000m water resistance—double the standard Pelagos—it sits at the top of the range as a declaration of manufacturing capability rather than a commercial volume driver. The case is Grade 2 titanium throughout, with a Grade 5 caseback where structural demands are highest. The helium escape valve is integrated into the case architecture, not added as a separate component. The lug-to-lug distance runs approximately 52mm.

The movement, the MT5612-U, achieves both COSC chronometer and METAS Master Chronometer certification—the first Tudor to hold both simultaneously. METAS certification adds requirements that exceed the COSC standard: testing for magnetic resistance up to 15,000 gauss, verification of power reserve under varied conditions, and accuracy confirmation across multiple wrist positions. The MT5612-U carries a silicon hairspring for magnetic resistance, runs at 4Hz (28,800vph), and delivers 65 hours of power reserve. The slight reduction from the standard MT5612’s 70 hours reflects the engineering tradeoffs inherent in achieving the METAS specification.

Tudor launched the Ultra at EUR 5,960 / CHF 5,500 including tax at European retail, with the US price subsequently set at $6,900. The watch positions itself as a range complement rather than a standard Pelagos replacement: for buyers whose diving genuinely requires 1,000m depth rating and METAS-certified accuracy in high-magnetic environments, the Ultra is the answer. For everyone else, the 25600TN/TB at $6,025 remains the more practical proposition.

All Pelagos References Compared

Reference	Year	Size	Water Resistance	Movement	Power Reserve	2026 MSRP
25500TN	2012	42mm	500m	ETA 2824-2	38h	Discontinued (~$3,000 pre-owned)
25600TN / 25600TB	2015	42mm	500m	MT5612 (COSC)	70h	$6,025
25610TNL (LHD)	2016	42mm	500m	MT5612-LHD (COSC)	70h	$6,025
25707B (FXD)	2021	42mm	200m	MT5602	70h	$5,025
25407N (Pelagos 39)	2022	39mm	200m	MT5400 (COSC)	70h	$5,625
25717N (FXD US Navy)	2023	42mm	200m	MT5602 (COSC)	70h	$5,025
M2543C1A7NU-0001 (Ultra)	2025	43mm	1,000m	MT5612-U (COSC + METAS)	65h	$6,900

Where to Buy

Current Pelagos models are available new through Tudor’s authorised dealer network and directly at Tudor boutiques. For pre-owned, the original 25500TN trades on platforms including Chrono24 and WatchBox between approximately $2,800 and $3,800 depending on condition and bracelet completeness. Current in-house generation references (25600TN, 25600TB, 25610TNL, 25407N) regularly appear pre-owned at 10–20% below retail from established grey-market dealers, though demand for the LHD and Pelagos 39 is consistent and premiums occasionally appear for the most popular configurations. Tudor’s authorised pre-owned programme provides warranty coverage on certified used examples.

Final Verdict

The Pelagos history is a coherent narrative about a brand building manufacture capability incrementally, establishing military credibility through real operational contracts, and expanding a range without diluting the original technical brief. For most buyers, the 25600TN or 25600TB remains the most versatile starting point—the 42mm standard with 500m rating, in-house movement, and titanium construction covers nearly every conceivable use case. Those with smaller wrists or a preference for a cleaner dateless dial should look at the Pelagos 39. The FXD is the right answer only if the fixed-strap ergonomic or military specification genuinely matters. And the Ultra, for all its specification, earns its premium only if the 1,000m rating or METAS certification aligns with how you actually dive. No other single line in its price bracket offers this range of differentiated technical choices—and none of them are marketing variants. Each references a real engineering decision made for a real operational reason.

Related Articles

See also: Tudor Pelagos Wrist Size Guide · Tudor Pelagos vs Panerai Submersible · Tudor In-House Calibres Explained · Do Tudor Watches Hold Their Value?

Sources: World Watch Review, “Tudor Pelagos Diver Titanium 500M Automatic” (March 2012). SJX Watches, “Tudor Introduces the Pelagos 39” (August 2022). The 1916 Company, “The Tudor Pelagos: A Guide to Tudor’s Technical Diver and Its Variants” (August 2024). Monochrome Watches, “Tudor Pelagos Ultra 1,000m Titanium Dive Watch Review” (April 2025). Watchbase, “Tudor Pelagos 25500TN-0001” specifications database. Tudor official website, tudorwatch.com (November 2026).