Breitling against TUDOR
Breitling A17375211B1S1 vs TUDOR M25407N-0001
13 published specifications differ between these two. 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 | Stainless steel, 42 mm | 39mm grade 2 titanium case with satin finish |
| Diameter | 42 mm | 39 mm |
| Water resistance | 30 bars (300 m / 990 ft) | Waterproof to 200m (660 ft) |
| Crystal | Cambered sapphire, glareproofed both sides | Sapphire crystal |
| Bezel | Unidirectional, ratcheted | Grade 2 titanium unidirectional rotating bezel with insert in sunray satin finish ceramic and luminous material |
| Dial | Black, as stated in the page description | Black sunray satin finish with sandblasted flange and monobloc luminescent ceramic composite hour markers |
| Crown | Screw-locked, two gaskets | Grade 2 titanium screw-down crown, adorned with the TUDOR shield in relief |
| Bracelet | Rubber strap, black, straight, 22/18 mm | Titanium bracelet |
| Clasp | Stainless steel folding clasp, 18 mm | TUDOR T-fit folding clasp, safety catch and diver's extension |
| Calibre | Breitling 17 | Manufacture Calibre MT5400 |
| Movement | Self-winding mechanical | Self-winding mechanical movement with bidirectional rotor system |
| Power reserve | Approximately 38 hours | Approximately 70 hours |
| Movement notes | No chronograph or calendar complication is listed for this reference. | 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.
| Thickness | 12.56 mm | not stated |
|---|---|---|
| Lug width | 22 mm | not stated |
| Case back | Screwed in | not stated |
| Frequency | 28,800 v.p.h | not stated |
| Jewels | 26 | not stated |
| Certification | not stated | COSC |
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 A17375211B1S1 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
300 metres on the A17375211B1S1 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.
One survives the weekend and one does not
70 hours on the M25407N-0001 against 38 on the A17375211B1S1. Below about sixty hours a watch left off the wrist from Friday is stopped by Monday. Wind both fully at intake and confirm they reach the stated figure — a short reserve leaves a tired barrel nowhere to hide, and it is the kind of fault a buyer reports in week two.
Different case materials, different handling
The A17375211B1S1 is steel and the M25407N-0001 is titanium. Different case materials mark, polish and refinish differently, so the condition language that fits one will mislead on the other. Photograph and describe each on its own terms.
One needs sizing, the other needs stock
The M25407N-0001 comes on a bracelet and the A17375211B1S1 on a strap. They are different jobs at resale: a bracelet has to be sized and its removed links kept with the watch, because a buyer who receives it short of links has received an incomplete watch. A strap is a consumable — check whether the one on the wrist is the one that should be in the photographs.
What to check on each
A17375211B1S1
- Count the bezel clicks through a full turn and confirm it will not move clockwise at all. A dive bezel that can run backwards can understate elapsed time, which is the one failure mode the unidirectional design exists to prevent.
- Seat and unseat the screw-locked crown several times, feeling for the thread catching cleanly. At 300 metres the crown is a primary seal and a cross-threaded one is an expensive tube repair.
- Expect this to stop overnight if it is left off the wrist. Thirty-eight hours sits at the bottom of the range covered on this site, and a buyer used to a 70-hour movement will think the watch is faulty.
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.
Sources
- Breitling official product page for reference A17375211B1S1 (Superocean Automatic 42) - Caliber: Breitling 17; Movement: self-winding mechanical; Power reserve: approx. 38 hrs; Vibration: 28,800 v.p.h; Jewel: 26 jewels; Case material: stainless steel; Caseback: screwed in; Water resistance: 30 bars (300 m / 990 ft); Bezel: unidirectional, ratcheted; Crown: screw-locked, two gaskets; Crystal: cambered sapphire, glareproofed both sides; Diameter: 42 mm; Thickness: 12.56 mm; Lug width (in-between lug): 22 mm; Strap material: rubber; Strap color: black; Strap type: straight; Lug: 22/18 mm; Buckle material: stainless steel; Buckle type: folding clasp; Buckle size: 18 mm; page meta description states a black dial — retrieved 2026-09-22
- 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
Not affiliated with Breitling or TUDOR. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.