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The Encyclopedia of Horology

Wristwatch · Dive watch

Tudor Pelagos M25600TB-0001

Partially verified

The Tudor Pelagos Blue, reference M25600TB-0001, is a dive watch featuring a 42mm titanium case with a helium escape valve. Rated to 500 meters of water resistance, it includes a unidirectional rotating bezel with a blue ceramic insert. The matte blue dial displays bold square markers and the Tudor 'snowflake' handset. Internally, the watch is powered by the in-house Calibre MT5612, an automatic movement holding COSC certification, a 70-hour power reserve, and a silicon balance spring. The watch is presented on a titanium bracelet equipped with a spring-loaded, self-adjusting clasp mechanism designed to compensate for changes in wrist size. This specific example is documented as a complete set including papers dated February 2023.

Front view of the Tudor Pelagos M25600TB-0001 featuring a matte blue dial and matching bezel.
Front view of the Tudor Pelagos M25600TB-0001 featuring a matte blue dial and matching bezel. — Analog:Shift. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
analogshift.com
Category
Wristwatch · Dive watch
Maker / attribution
Tudor
Reference
M25600TB-0001
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
February 2023
Source-reported place
Not established

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial Design

The case of the Pelagos is constructed from titanium and measures 42mm in diameter. It is equipped with a helium escape valve and is rated for a depth of 500 meters. The aesthetic is defined by a matte blue dial that incorporates high-legibility square markers, an outer minute track, and the brand’s characteristic 'snowflake' handset.

The dial is paired with a unidirectional rotating bezel featuring a ceramic insert. The design prioritizes visual clarity in low-light or underwater conditions, ensuring information can be read quickly without distraction.

Evidence for this section
  • “Executed entirely in titanium, the 42mm case is both lightweight and exceptionally robust, outfitted with a helium escape valve and rated to a formidable 500 meters of water resistance.”
  • “The matte blue dial — matched to a unidirectional ceramic bezel with a luminous insert — is purpose-built for legibility, with bold square markers, an outer minute track, and the brand’s signature ‘snowflake’ handset.”

Movement Specifications

The watch functions via the in-house Calibre MT5612 automatic movement. This movement is COSC-certified, confirming its precision standards. Technical features include a 70-hour power reserve and a silicon balance spring, which is utilized for its resistance to magnetic interference and mechanical shocks.

The movement is intended for consistent daily wear, serving as a functional component within the watch's tool-oriented design profile.

Evidence for this section
  • “Inside beats the in-house, COSC-certified Calibre MT5612 automatic movement, offering a 70-hour power reserve and a silicon balance spring for enhanced resistance to magnetism and shocks.”

Bracelet and Accessories

The watch is fitted with a titanium bracelet that utilizes a specialized spring-loaded, self-adjusting clasp. This component is engineered to automatically adjust to fluctuations in wrist size caused by factors such as ambient temperature changes or pressure-induced compression during diving activities.

This example is offered as a complete set. The included documentation consists of its original papers, which are dated February 2023.

Evidence for this section
  • “Fitted with Tudor’s spring-loaded, self-adjusting clasp, it automatically compensates for changes in wrist size — whether from temperature shifts or a wetsuit compressing at depth.”
  • “This example is offered as a complete set, with its full kit and papers dated February 2023”

Open research questions

  • What is the specific manufacturer-stated weight of the titanium case assembly?
  • Are there variations in the blue dial finish across different production batches of the M25600TB-0001?

Source evidence

Recorded claims and source quotations for Tudor Pelagos M25600TB-0001
FieldSource-reported valueSource quotation
MakerTudor“Vendor: Tudor”
ModelPelagos M25600TB-0001“The Tudor Pelagos M25600TB-0001 is firmly in the latter.”
Case MaterialTitanium“Executed entirely in titanium”
Water Resistance500 meters“rated to a formidable 500 meters of water resistance”
MovementCalibre MT5612“Inside beats the in-house, COSC-certified Calibre MT5612 automatic movement”
Power Reserve70 hours“offering a 70-hour power reserve”
Documentation DateFebruary 2023“papers dated February 2023”
Clasp typeSpring-loaded, self-adjusting“Fitted with Tudor’s spring-loaded, self-adjusting clasp”

Visible details

  • Helium escape valve on case side
  • Tudor shield logo on winding crown
  • Square hour markers on dial
  • Spring-loaded clasp mechanism indicated by bracelet construction

Research qualifications

  • Movement performance is not verified beyond the COSC certification mentioned
  • Long-term durability of the silicon balance spring in varied environmental conditions is not documented in the source

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Tudor Pelagos Blue

Reviewed 2026-11-02 · Record c30508a88e

Terms in this record

Glossary explanations for terms named in this object’s record.

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