Tudor · Pelagos

Strap for Pelagos FXD Marine Nationale 2021

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter42 mm
Reference25707B/21-0001 (aka: M25707B/21-0001)
FamilyPelagos
MovementTudor caliber MT5602 hours, minutes, seconds | chronometer
Year2021 - 2021
CaseTitanium, Ceramic, Stainless Steel

Recommended spring bar

Modern Tudor 22mm spring bars — factory specification

Technical match for lug width and diameter · lug 22 mm · Ø 1.8 mm

All Tudor spring barsOpen →

Straps for the Pelagos 25707B/21-0001 (aka: M25707B/21-0001)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Pelagos 25707B/21-0001 (aka: M25707B/21-0001), seen from the bench

The Tudor Pelagos 25707B/21-0001 is a professional diving instrument with a 42mm Grade 2 titanium case and high-resistance ceramic bezel, rated to 500 meters. It features the MT5602 chronometer-certified movement and a 22mm lug width. Designed for deep-water operations, it combines lightweight construction with corrosion resistance, prioritizing functional reliability over aesthetics.

Frequently asked questions

What is the exact lug width of the Tudor Pelagos 25707B/21-0001?

The lug width of the Tudor Pelagos 25707B/21-0001 is 22mm. This dimension is measured from the inner distance between the two lug attachments on the case. It is essential to verify this measurement before ordering a compatible strap to ensure correct fitting on the titanium and ceramic case.

What is the best strap material for the Tudor Pelagos 25707B/21-0001?

The choice depends on intended use. For frequent professional diving, rubber or silicone straps are superior for water resistance and quick drying. For daily wear alternated with occasional diving, a vegetable-tanned leather strap offers a balance between structural durability and artisanal aesthetics. NATO-style synthetic fabric straps represent a tactical intermediate option.

How do I change the strap on my Tudor Pelagos 25707B/21-0001?

Strap replacement on the Pelagos is accomplished by removing the lug pins. Using a small dedicated tool (spring bar tool), you laterally compress the elastic pins that anchor the strap to the case lugs. Once the pins are released, the old strap slides out easily and the new one is inserted, aligning the holes and ensuring the pins snap securely into position.

Can I use an aftermarket compatible strap on my Tudor Pelagos?

Yes, provided the strap is constructed with precise 22mm lug width and adequate thickness to withstand the stresses of a 500-metre dive watch. Quality artisanal straps, such as those available on milanostraps.it, are fully compatible and often offer superior aesthetics and craftsmanship compared to original bracelets.

How long does a leather strap last on a Tudor Pelagos subjected to diving?

A high-quality leather strap (vegetable-tanned or alligator) typically lasts 2–4 years if used occasionally for diving. Chronic exposure to salt water, prolonged humidity, and repetitive movements significantly reduce durability. For primarily underwater use, rubber and silicone straps guarantee durability exceeding 5–7 years without structural deterioration.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only