Name: Tudor Pelagos FXD M25707B-0001
Brand: Tudor
SKU: M25707B-0001

The Pelagos FXD (ref. M25707B-0001) is the fixed-bar-lug Pelagos, 42mm titanium, the in-house MT5602 (no-date variant of the MT5612), and a case design developed with the Marine Nationale French combat-swimmer unit. The 'FXD' refers to the fixed strap-bars: no quick-release, no spring bars, just permanently-attached bars sized for the issued Marine Nationale strap. It is the most-tool-watch dive watch in Tudor's modern catalog.

What it is

Tudor announced the Pelagos FXD in 2021 as a Marine Nationale collaboration, a navy-blue-dialed titanium dive watch with fixed strap-bars (a design inherited from the 1970s Tudor 7016 'Marine Nationale' issued to the same unit). The MT5602 caliber is the chronometer-certified in-house Tudor movement without the date complication, a 70-hour reserve, free-sprung balance, silicon hairspring. The bezel is bidirectional (a navigation tool, not a dive-time bezel, significant because the FXD is designed for amphibious-navigation work, not recreational diving).

A black-dialed 'Pelagos FXD Chrono' followed; a 2023 'Pelagos FXD Alinghi' edition added a red bezel.

Buying notes

Common things to check: titanium case finishing (Tudor's titanium is unforgiving of polishing, most professional refinishing services will not touch a titanium FXD case, so original-finish examples are the canonical buy and scratched cases should be priced as condition-relevant rather than restorable); fixed strap-bars (the FXD ships with a Marine Nationale fabric strap and a rubber strap, verify both are included; aftermarket bracelets do not fit the FXD without modification, and the watch's design intent is the fabric or rubber strap); bidirectional bezel (correct on the FXD, it's a navigation bezel, not a dive-time bezel; if the bezel is unidirectional, it has been service-replaced incorrectly); MT5602 (in-house Tudor caliber, robust, no date complication); the watch is 42mm and 12.75mm thick, wears smaller than the original 42mm Pelagos because of the fixed-bar lug design.

Market read

Pelagos FXD examples trade in the $3,800-$4,300 range through 2024-2026, against a retail of approximately $4,400. The FXD has been one of the better-priced modern dive watches at the in-house caliber level; secondary-market supply has been consistent and pricing is steady. The 'Alinghi' and 'Chrono' variants trade at proportionally higher prices.

The fixed-bar lug design polarizes buyers, collectors who want strap-versatility prefer the standard 39mm Pelagos; collectors who want the tool-watch credentials of the Marine Nationale collaboration prefer the FXD.

Service expectations

The MT5602 is Tudor's in-house caliber and is serviced by Tudor's network and by experienced Rolex/Tudor independents, the same service story as the BB58 and the Pelagos 39. Service interval is 7-10 years; cost is moderate (low-four-figures via Tudor). Titanium case refinishing is not a routine service item; buyers should expect to live with the watch's accumulated wear rather than restoring it.

Editorial copy is AI-drafted from primary sources and reviewed by Grail Atlas before publication. Where the text is uncertain about a fact, it says so. Email corrections@grailatlas.com if something reads wrong. Signals on this page (community, OSINT) are clearly separated from the editorial sections.

GPHG 2022WinnerPrix de la Montre de Plongée

Entry to the Grand Prix d'Horlogerie de Genève is voluntary and made by the brand. An entry is a watch registered for that year's competition, not a jury verdict, and several large houses including Rolex, Patek Philippe and Omega do not take part at all.

Mass-produced#2 in familyOfficial press photos

What it was up against

Plongée, GPHG 2022

The Plongée category at GPHG 2022 held 8 entries. These are the other 7.

Filter the full GPHG field for Plongée, 2022

Condition affects price

Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.

New Old Stock

Unworn example retaining original packaging, tags, and warranty documentation.

+30–50% vs median

Unpolished

Worn but the case has never been polished; original brushed and polished surfaces are intact.

+15–25% vs median

Polished

Case has been professionally or amateur polished at some point; edge definition is softened.

-15 to -5% vs median

Recently Serviced

Movement has been recently serviced with documented service records; case condition varies.

At median

Project

Needs service, has dial or hand issues, non-original parts, or other remediation before daily wear.

-50 to -25% vs median

Full condition grading guide →

Market price

$4,000–$5,500

steel·2026 Q2

Price trend chart coming soon

The FXD-strap Pelagos launched with TUDOR's new generation and holds value well; titanium case and certified COSC movement justify the premium over earlier Pelagos references.

Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.

Movement tier: unclassified · caliber Tudor MT5602: in-house automatic, 28,800bph, 70h PR, 26j; COSC-certified, bidirectional winding; used in Pelagos FXD · 70h power reserve (2.9 days)

Medium-large: suits wrists 6.5 in+ (16.5 cm+)

42 mm case. Wears confidently on average to larger wrists. May overhang on slender builds.

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Authentication

The fixed fabric strap attachment points are the defining physical feature; any Pelagos FXD with removable lugs or a bracelet has been modified.

Known issues in the market

Fixed lug modification is occasionally attempted; inspect the 6 and 12 o'clock lug areas for signs of welding or fill.
METAS certification on Cal. MT5602 requires verification; service at non-Tudor facilities may void METAS status.
The GMT hand must move independently in one-hour increments; a GMT hand linked to the main hour hand indicates a damaged movement.

Area	What to check	What is correct	Red flag
case	Fixed lug attachment architecture	Fabric strap integrated into fixed lug points at 6 and 12; no spring bar slots or quick-release mechanism	Spring bar slots present or a standard bracelet fitted indicating lug modification
dial	GMT hand independent movement	Red arrow GMT hand advances in one-hour increments independently of the main hour hand via crown position	GMT hand that advances with the main hour hand simultaneously, indicating GMT complication failure
caseback	Cal. MT5602 in-house movement	Tudor in-house Cal. MT5602 visible through caseback; movement signed Tudor and METAS-certified	Non-Tudor movement visible through caseback indicating a movement swap

Common legitimate replacements

Cal. MT5602 service must go through Tudor or an authorized center to maintain METAS certification.
The fixed strap attachment cannot be converted to a standard lug without destructive modification; this modification is irreversible.

Expert resources: Tudor Pelagos FXD documentation at tudorwatch.com. WatchUSeek Tudor subforum for fixed-lug modification detection and METAS service history.

Authentication guide

Last reviewed June 2026

The Pelagos FXD is Tudor's military-specification dive watch, designed for combat divers who cannot risk a spring-bar failure during a dive. The fixed strap system with no spring bars is the defining feature. The titanium case and bezel keep the watch light on the wrist. Authentication priorities are the fixed strap attachment system, the titanium case construction, and the MT5602 movement.

Known reproduction risks

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HIGH RISK

The Pelagos FXD is difficult to replicate convincingly because the fixed strap system requires specialized case machining. Most replicas use a conventional spring-bar lug system.

Spring bar holes in the lugs -- the single most immediate tell; the genuine FXD has no spring bar holes
Case with a polished surface anywhere -- the FXD is all brushed matte
Case that attracts a magnet -- titanium is non-magnetic
Standard rubber strap that removes with a spring bar tool

Dial variants by era

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Era	Description	Identifiers
2021 to present (blue)	Blue matte dial with applied snowflake hands and mixed Arabic and dot indices. The dial has a military-specification layout designed for legibility under water.	Blue matte dial -- not a glossy or sunburst finish Snowflake hands in Tudor's house style, with rectangular lume plots Fixed strap attachment points at the lugs -- no spring bar holes visible from the side or front Titanium case with a brushed matte surface; no polished zones Unidirectional rotating bezel with a titanium frame and ceramic insert
2021 to present (black)	Black dial variant. Same titanium case and fixed strap system.	Black matte dial with identical index and hand layout to the blue variant Fixed strap attachment consistent across all Pelagos FXD configurations

Service part flags

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Fixed strap system (no spring bars)

Original: The Pelagos FXD uses a proprietary fixed strap attachment that integrates directly with the case. There are no spring bar holes in the lugs. The strap cannot be removed with a standard spring bar tool -- it requires a specific tool or the strap end must be manipulated through its own release mechanism. This design prevents accidental spring bar failure during combat diving.

Replacement tells

Spring bar holes visible in the lugs from the front or side -- the genuine FXD has solid lugs with no spring bar tubes
Strap that can be removed with a standard spring bar tool -- if it pops out easily, it is not the fixed system
Standard rubber strap with conventional quick-release fitted to a stated FXD case
Lug profile inconsistent with the FXD's integrated strap attachment geometry

Titanium case and bezel

Original: Full titanium construction: case, bezel frame, and crown. The titanium is brushed matte throughout with no polished zones. Titanium is lighter than steel and has a slightly darker, more matte appearance. The bezel insert is ceramic.

Replacement tells

Case that feels heavier than expected -- titanium is perceptibly lighter than steel; a steel case substitution is detectable by weight
Polished zones on the case where only brushed matte should appear
Bezel insert that scratches with a steel tool (ceramic does not; an aluminum replacement would)
Magnetic attraction -- genuine titanium is non-magnetic; if a magnet attracts the case, the material is wrong

MT5602 movement

Original: Tudor MT5602 is an in-house automatic, 28,800bph, 70-hour power reserve, 26 jewels. METAS-certified. The caseback has Tudor hallmarks and "MANUFACTURE MOVEMENT" designation.

Replacement tells

Power reserve depleting in under 48 hours from full wind
Caseback without the expected Tudor manufacture designation
Movement that does not match the 28,800bph beat rate on a timegrapher

Case back markings

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2021 to present

Solid titanium caseback with Tudor shield at center
"TUDOR PELAGOS FXD" on the outer ring
"MANUFACTURE MOVEMENT" and METAS certification reference
"200M / 660FT" water resistance rating
Reference and serial number on the case

Movement tells

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MT5602, 28,800bph, 70-hour power reserve. Same caliber family as the Black Bay GMT but without the independent GMT function.
METAS certification: rate accuracy across multiple positions should be tightly controlled. A timegrapher check dial-up and crown-up should show low variation between positions.
Silicon hairspring: not affected by magnetic fields. If rate changes dramatically near a magnet, suspect a non-MT5602 movement.

Sources: Fratello -- Tudor Pelagos FXD review; Tudor -- Pelagos FXD specification.