TUDOR · Pelagos and Pelagos
TUDOR M25407N-0001 vs TUDOR M25610TNL-0001
8 published specifications differ between these two, and 6 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.
What differs
| Specification | TUDOR Pelagos 39, grade 2 titaniumM25407N-0001 | |
|---|---|---|
| Case | 39mm grade 2 titanium case with satin finish | 42mm titanium and steel case with satin finish, numbered steel case back |
| Diameter | 39 mm | 42 mm |
| Water resistance | Waterproof to 200m (660 ft) | Waterproof to 500m (1,640 ft) |
| Bezel | Grade 2 titanium unidirectional rotating bezel with insert in sunray satin finish ceramic and luminous material | Titanium unidirectional rotatable 60-minute graduated bezel with ceramic matt black disc and graduations with beige luminescent coating |
| Dial | Black sunray satin finish with sandblasted flange and monobloc luminescent ceramic composite hour markers | Black, date at 3 o'clock with even numbered days displayed in red and odd numbered days in black |
| Crown | Grade 2 titanium screw-down crown, adorned with the TUDOR shield in relief | Titanium screw-down winding crown at 9 o'clock with the TUDOR logo in relief; automatic helium escape valve at 3 o'clock |
| Clasp | TUDOR T-fit folding clasp, safety catch and diver's extension | Folding clasp and safety catch in steel, with a bracelet extension system developed and patented by TUDOR |
| Calibre | Manufacture Calibre MT5400 | Manufacture Calibre MT5612-LHD |
What is identical
Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.
- Crystal
- Sapphire crystal
- Bracelet
- Titanium bracelet
- Movement
- Self-winding mechanical movement with bidirectional rotor system
- Power reserve
- Approximately 70 hours
- Certification
- COSC
- Movement notes
- TUDOR states a five-year transferable guarantee with no registration or periodic maintenance checks required.
Stated for one, not the other
These rows cannot be compared, because one maker publishes the figure and the other does not. An empty cell is a gap in the manufacturer's documentation, not a gap in the watch — and not a licence to fill it in from the other column.
| Case back | not stated | Numbered steel case back |
|---|
What the differences cost you
Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.
These reach different buyers
42 mm on the M25610TNL-0001 against 39 mm on the M25407N-0001. Diameter is a poor predictor of how a watch actually sits, but it is the field buyers filter on, so the two land in front of different people. Do not let one listing's photographs or copy stand in for the other.
Do not describe these the same way
500 metres on the M25610TNL-0001 against 200 on the M25407N-0001. Both are more than daily life asks for, so the number is a listing-accuracy question rather than a practical one: quote each watch its own figure, and remember that neither rating survives an unserviced case by itself.
Different movements to verify and to service
The M25407N-0001 runs the Manufacture Calibre MT5400 and the M25610TNL-0001 the Manufacture Calibre MT5612-LHD. Two consequences at intake: the service history that is normal for one calibre is not evidence about the other, and the calibre is the check that catches a movement swapped into the wrong case. Confirm the movement matches the reference rather than assuming it from the dial.
What to check on each
M25407N-0001
- Grade the titanium against titanium rather than steel. It scuffs greyer and broader, so a well-kept titanium case reads worse under a raking light than steel in the same condition.
- Check the crown is titanium as specified rather than a steel replacement, since TUDOR names the material for the crown separately on this reference.
- Run the T-fit clasp through every position and confirm each one locks. It is a toolless rapid adjustment and it is the mechanism most used on the bracelet.
M25610TNL-0001
- Confirm the crown is at 9 o'clock and the helium escape valve at 3. On this reference the two are reversed relative to the standard Pelagos, and a watch with them the usual way round is a different reference.
- Photograph the number engraved on the steel case back and record it, because a numbered back is part of what a buyer is acquiring.
- Check the date alternates red for even days and black for odd ones across a full change, which is specified behaviour rather than a fault.
Sources
- TUDOR official product page for reference M25407N-0001 (Pelagos 39; 39mm grade 2 titanium) - Case: 39mm grade 2 titanium case with satin finish; Waterproofness: Waterproof to 200m (660 ft); Bezel: Grade 2 titanium unidirectional rotating bezel with insert in sunray satin finish ceramic and luminous material; Dial: Black sunray satin finish with sandblasted flange and monobloc luminescent ceramic composite hour markers; Crystal: Sapphire crystal; Movement: Manufacture Calibre MT5400 (COSC); self-winding mechanical movement with bidirectional rotor system; Power Reserve: Power reserve of approximately 70 hours; Winding Crown: Grade 2 titanium screw-down crown, adorned with the TUDOR shield in relief; Bracelet: Titanium bracelet with TUDOR T-fit folding clasp, safety catch and diver's extension; Guarantee: Five-year transferable guarantee with no registration or periodic maintenance checks required — retrieved 2026-09-23
- TUDOR official product page for reference M25610TNL-0001 (Pelagos LHD; titanium and steel; crown at 9 o'clock) - Case: 42mm titanium and steel case with satin finish; numbered steel case back; Waterproofness: Waterproof to 500m (1,640 ft); Bezel: Titanium unidirectional rotatable 60-minute graduated bezel with ceramic matt black disc and graduations with beige luminescent coating; Dial: Black; date at 3 o'clock with even numbered days displayed in red and odd numbered days in black; Crystal: Sapphire crystal; Movement: Manufacture Calibre MT5612-LHD (COSC); self-winding mechanical movement with bidirectional rotor system; Power Reserve: Power reserve of approximately 70 hours; Winding Crown: Titanium screw-down winding crown at 9 o'clock with the TUDOR logo in relief; automatic helium escape valve at 3 o'clock; Bracelet: Titanium bracelet with folding clasp and safety catch in steel with bracelet extension system developed and patented by TUDOR; Guarantee: Five-year transferable guarantee with no registration or periodic maintenance checks required — retrieved 2026-09-23
Not affiliated with TUDOR. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.