Tap the image to enlarge
Tudor Pelagos FXD Marine Nationale 42mm Titanium
Ref. 25707B/26-0001
See more premium optionsHide
Stepping up in Tudor's range
The Pelagos FXD began as Tudor's acknowledgement of a debt. From the 1950s onwards, the French Navy's combat divers wore Tudor Submariners as service-issued equipment, and the Marine Nationale relationship has continued ever since. This watch — the FXD designation referring to the fixed strap bars machined directly into the case block, which prevent a spring bar from failing at depth — is a direct descendant of those military-issue pieces. The bidirectional bezel counts down rather than tracking elapsed time, which is how mission diving is actually timed, and the dial carries no date, keeping the display as clean as the original service watches ever were. At 12.75mm thick in titanium, it sits closer to the wrist than most 42mm divers have any business doing, and the lug-to-lug of 52mm wears shorter than it measures. The blue lume emission is immediately legible in low light, a brighter output than the average diver. The navy fabric strap adjusts through a hook-and-loop titanium loop rather than a buckle in the conventional sense, which means the fit changes in seconds, over or under a wetsuit sleeve, with no tool and no pin to find. The MT5602 inside is built by Kenissi, Tudor's manufacture, and COSC-certified with a 70-hour reserve — enough to last a long weekend without the kind of anxiety that attends a shorter-running movement.
- Reference
- 25707B/26-0001
- Brand
- Tudor
- Collection
- Pelagos
- Case size
- 42mm
- Case thickness
- 12.75mm
- Lug width
- 22mm
- Case material
- Titanium
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Bezel
- Bidirectional rotating
- Movement
- Automatic
- Calibre
- MT5602
- Functions
- GMT, Date
- Water resistance
- 200m
- Bracelet / strap
- Fabric strap
- Strap colour
- Blue
- Clasp
- Buckle
- Lume
- Luminous
- Condition
- Pre-owned
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 52mm
- Power reserve
- 70 hours
Learn more about Tudor
Tudor exists because Hans Wilsdorf wanted to sell a Rolex to people who could not afford one. He registered the name in 1926 and relaunched it properly in 1946 as a separate company: Rolex cases, Rolex bracelets, Rolex crowns, but bought-in movements — usually ETA — at a fraction of the price.
For decades this made Tudor the practical choice for organisations buying in bulk. The French Marine Nationale issued Submariners to its divers. The US Navy tested them. Tudor's military history is arguably richer than Rolex's, because navies bought Tudors.
The watches developed their own identity regardless. The snowflake hands fitted to Submariners from 1969, specified by the French navy for legibility, became a signature the brand still uses. The Monte Carlo chronographs of the early 1970s, with their orange and blue dials, look nothing like anything Rolex made.
The brand withdrew from the US market in 1996 and spent a decade in relative obscurity before returning in 2013 with the Heritage Black Bay, which mined the archive rather than chasing modernity. It worked. Tudor now develops its own movements through a partnership with Kenissi, supplies calibres to Breitling, and holds METAS Master Chronometer certification — a technical position it never had when it was simply the affordable Rolex.
- 1926
- Hans Wilsdorf registers the Tudor name.
- 1946
- Montres Tudor SA is established as a separate company.
- 1969
- Snowflake hands appear on Submariners for the French navy.
- 2012
- The Black Bay revives the brand internationally.
- 2015
- The first in-house Tudor calibre is released.
Also in 7 collections
This watch appears in the Tudor Pelagos range (6), Back in Stock (4,191), Automatic Watches (1,701), Blue Dial Watches (763), Sports Watches (756), Dive Watches (535) and Pre-Owned, Ex-Display & Vintage Watches (355).
Temporarily out of stock
Mappin & Webb is not currently taking orders for this reference. Last listed as available on 17 September 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
A mechanical watch built to be worn hard and got wet.
Strengths
- 200m water resistance, rated for actual diving
- Sapphire crystal, which resists scratching
- 70-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
- Second time zone for travelling
Tudor Pelagos FXD Marine Nationale alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 25707B/26-0001 | A25310241K1X1 | L28364529 |
|---|---|---|---|
| Price | £2,550 | £2,760 | £2,550 |
| Case size | 42mm | 42mm | 43mm |
| Water resistance | 200m | 100m | 300m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Fabric strap | Leather strap | Stainless steel bracelet |
| Power reserve | 70 hours | 42 hours | 52 hours |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 200m it is rated for swimming, snorkelling and recreational diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 70 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
22mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 52mm, which suits wrists from roughly 17.5cm (7 inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's.
More Tudor watches like the Pelagos FXD Marine Nationale
In stock, and close on style and price
