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The Breitling Chronomat Automatic GMT 40 is a compelling everyday travel watch if you value Breitling’s distinctive design more than the fastest possible GMT adjustment. Its 40 mm case, rider-tab bezel, onion-style crown, Rouleaux bracelet, red 24-hour hand, sapphire crystal, and 200 m water resistance create a versatile package. But Caliber 32 is a caller GMT, not a flyer GMT: the red GMT hand jumps independently, while the local hour hand does not.
This review combines Breitling’s published specifications with contemporary specialist hands-on coverage. It does not claim personal wrist time or independent testing.
Short answer: The Breitling Chronomat Automatic GMT 40 is one of the more wearable versions of Breitling’s distinctive sports-watch design. Its 40 mm case, Rouleaux bracelet, rider-tab bezel, onion-style crown, 200 m water resistance, and discreet red GMT hand make it a convincing everyday travel watch. The important compromise is functional: this is a caller GMT, not a flyer GMT. The red 24-hour hand adjusts independently, while the conventional local-time hour hand does not jump independently for quick timezone changes.
That makes the Chronomat GMT 40 best for someone who wants Breitling’s unmistakable design and a way to monitor home time, rather than for a frequent traveler who prioritizes the fastest possible local-time adjustment or a power reserve longer than a typical weekend.
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- Breitling Chronomat B01 42 Chronograph Automatic Men's Watch AB0134101K1A1
Scope note: This review brings together Breitling’s published specifications and contemporary specialist hands-on coverage. It does not claim personal ownership, independent accuracy testing, water-resistance testing, bracelet testing, or measured movement performance.
What is the Breitling Chronomat Automatic GMT 40?
Introduced in 2022, the Chronomat Automatic GMT 40 is a non-chronograph member of Breitling’s Chronomat family. It adds a second-time-zone display and date window to the collection’s established design language without the pushers, sub-dials, and additional bulk of the larger Chronomat chronographs.
Breitling traces the Chronomat’s visual identity to a watch developed for Italy’s Frecce Tricolori aerobatic team. Its most recognizable details remain intact here: the raised rider tabs around the bezel, the rounded Rouleaux bracelet, and the fluted or onion-style crown. The result is not a generic three-hand GMT with a Breitling logo. It is immediately identifiable as a Chronomat, but the 40 mm format gives it a less imposing profile than the larger chronograph models.
| Specification | Chronomat Automatic GMT 40 |
|---|---|
| Case material | Stainless steel on the original steel-bracelet configurations; other configurations vary |
| Diameter | 40 mm |
| Thickness | 11.77 mm |
| Lug width | 20 mm |
| Reported lug-to-lug | 47.4 mm |
| Movement | Breitling Caliber 32, self-winding mechanical GMT movement |
| Power reserve | Approximately 42 hours |
| Beat rate | 28,800 vibrations per hour |
| Jewels | 21 |
| Certification | COSC-certified according to contemporary specialist coverage |
| Crystal | Cambered sapphire with glareproofing on both sides |
| Water resistance | 20 bar, equivalent to 200 m or 660 ft |
| Bracelet | Stainless-steel Rouleaux bracelet on the original steel configurations |
Design: a quieter Chronomat, not a generic GMT
The strongest reason to buy this watch is its design. The Chronomat’s rider tabs were originally intended to help protect the crystal and provide tactile control of the bezel. On the GMT 40, they give the watch a more purposeful and architectural appearance than a conventional smooth-bezel sports watch.
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The onion-style crown reinforces that identity. It is visually prominent and supplies a useful tactile detail, while the rounded Rouleaux bracelet continues the case’s curved, industrial language. These are the elements that distinguish the watch from a standard integrated-bracelet sports watch or a conventional pilot GMT.
Compared with a Chronomat chronograph, the GMT 40 is visually less busy. There are no chronograph sub-dials, elapsed-time markings, or pump pushers. The 40 mm case also avoids much of the physical and visual bulk associated with larger Chronomat chronograph references. That makes it the more restrained choice within the family, although the bracelet and bezel still give it a strong presence.
The dial and the tone-on-tone GMT scale
Rather than putting a bright 24-hour scale on an external red-and-blue or black-and-white GMT bezel, Breitling places a tone-on-tone 24-hour scale around the perimeter of the dial. This is a deliberate aesthetic choice. The dial remains relatively clean, and the red GMT hand becomes the main visual signal.
The trade-off is immediate readability. A high-contrast 24-hour bezel separates day and night at a glance and makes the second-time-zone function visually obvious. The Chronomat’s subdued scale is more elegant and less instrument-like, but it requires a closer look, especially in low light or when the wearer is unfamiliar with the watch. Contemporary reviewers generally found the arrangement legible, while also noting that it is limited to two time zones.
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Rank #2
- Cambered sapphire, glareproofed both sides
- Signature 'Rouleaux” bracelet
- Power reserve approx. 70 hrs
- Watch movement type: Breitling 01 (Manufacture) automatic-self-wind
- Band color: silver and gold
How the GMT function works
The most important thing to understand before buying the Chronomat GMT 40 is its GMT architecture.
The red hand is the independently adjustable GMT hand. It points to the 24-hour scale around the dial and can track a second time zone, including whether that reference time is day or night. The conventional hour and minute hands show the primary time, while the date is coordinated with the regular time display.
Caller GMT versus flyer GMT
| Operation | Chronomat Automatic GMT 40 | Flyer GMT |
|---|---|---|
| Independently adjustable hand | Red 24-hour GMT hand | Usually the conventional local-time hour hand |
| Best travel use | Keeping home or reference time visible while setting the main display | Quickly changing local time after landing |
| Local-time adjustment | The regular hour hand is not independently jumping | The local hour hand jumps in one-hour increments |
| Ideal owner | Someone who values a second-time-zone reference and the design | Someone who changes time zones frequently and wants maximum convenience |
In practical terms, a traveler can set the red hand to home time and use the conventional hands for the current local time. That is useful when monitoring business hours, family time, or a departure city’s timezone. But after landing, the local-time adjustment is not the quick one-hour jump associated with a flyer GMT. The main hands must be adjusted instead.
Neither layout is universally superior. A caller GMT can be perfectly sensible for a wearer who rarely changes time zones but wants a permanent home-time reference. A flyer GMT is more convenient for someone crossing several time zones in a month. The Chronomat’s caller configuration is a limitation only if the buyer expects the watch to behave like a travel-optimized pilot GMT.
Breitling identifies Caliber 32 as a self-winding mechanical movement with a second-time-zone function. Contemporary specialist coverage describes it as a caller GMT based on the ETA 2893-2 architecture. For exact crown positions and setting precautions, use the user guide for the specific reference rather than relying on a generic GMT-setting sequence.
Winding and power reserve
Caliber 32 beats at 28,800 vibrations per hour, uses 21 jewels, and provides approximately 42 hours of power reserve. Breitling’s user documentation specifies manual winding through clockwise crown turns when the movement needs to be started or topped up.
Forty-two hours is adequate for routine daily wear, but it is not especially generous by current automatic-movement standards. If the watch is removed late on Friday and left unworn through the weekend, it may have stopped by Monday. The owner may then need to wind it and reset the time and date. That is a specification-based inconvenience, not evidence of poor reliability.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThe movement is described as COSC-certified by contemporary specialist coverage. That certification should not be confused with a promise that every individual watch will perform identically in every position, temperature, or state of wind. The dossier’s reviewed official product information did not display COSC certification in its technical-data block, so the claim is best attributed to that specialist coverage.
Case, crystal, bezel, and water resistance
At 40 mm wide and 11.77 mm thick, the Chronomat GMT 40 sits in a broadly wearable modern sports-watch size. A reported 47.4 mm lug-to-lug measurement supports the impression that the case is compact enough for many wrists, although the prominent bezel and substantial bracelet give it more visual presence than those numbers alone suggest.
Rank #3
- Breitling Superocean 42mm Heritage B20 Automatic Blue Dial Watch UB2010161C1S1
The case uses a cambered sapphire crystal with glareproofing on both sides. Sapphire is a practical advantage for a travel watch because it is highly resistant to everyday scratching, while the anti-reflective treatment helps preserve dial visibility under changing light. No independent crystal or glareproofing test is claimed here.
The screw-locked crown has two gaskets, and the caseback is screwed down. Breitling rates the watch to 20 bar, or 200 m/660 ft. That is a notably versatile specification for a mechanical GMT intended to cover travel and daily wear. It gives the watch a stronger aquatic-use brief on paper than many dressier travel watches.
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Water resistance is not permanent, however. Gaskets age, impacts can affect sealing surfaces, and operating the crown while it is unsecured can compromise protection. The crown should be properly secured, and the watch should be inspected and pressure-tested at appropriate service intervals, particularly if it is regularly exposed to water. The rating should not be treated as a guarantee under every condition or as a substitute for dive-watch operating procedures.
What the bezel does—and does not do
The bezel is unidirectional and ratcheted. Because the 24-hour GMT scale is printed around the dial rather than on the bezel, rotating the bezel does not select a third time zone. It functions primarily as a timing or recreational-use bezel.
That distinction is easy to miss in photographs. Buyers expecting a conventional external GMT bezel for a fast third-time-zone calculation should look elsewhere. The Chronomat GMT 40’s bezel is part of the collection’s design and timing functionality; the red hand and fixed dial scale handle the second-time-zone display.
Bracelet and everyday wear
The Rouleaux bracelet is arguably as important to the watch’s identity as the rider tabs. Its rounded links flow into the case and make the watch look like a complete design rather than a standard case fitted with an interchangeable steel bracelet. Contemporary coverage highlighted its comfort and visual continuity, although those impressions are reviewer assessments rather than independent fit testing.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe main practical caveat is bracelet adjustment. Contemporary reports noted that the original bracelet clasp lacks micro-adjustment, which can make a precise fit harder to maintain when a wrist expands or contracts with temperature and activity. Buyers who are sensitive to bracelet fit should try the exact reference on the wrist and confirm how many removable links and clasp positions are available before purchase.
Breitling’s current Chronomat collection material describes newer Chronomat bracelets as having discreet micro-adjustments on both sides of a hidden butterfly clasp. That feature should not automatically be assumed to apply to every earlier Chronomat Automatic GMT 40. Confirm the exact reference, production version, and clasp before treating micro-adjustability as a purchase feature.
With its 20 mm lug width, owners considering a strap alternative can investigate a 20 mm watch strap, but lug width alone does not guarantee compatibility. End links, spring-bar dimensions, case geometry, clasp fit, and the desired finish all need checking. On a high-value watch, bracelet removal or fitting is best handled carefully by a qualified watchmaker if the owner is not experienced.
Rank #4
- Polished Stainless Steel Case and Bracelet, Case Diameter: 44mm
- Blue Dial with Index Hour Markers
- Breitling Caliber B20
- Self-winding Automatic Movement, COSC Chronometer Certified
- 200 Meters / 660 Feet Water-Resistant
Configurations, prices, and availability
Availability is currently reference-dependent. Breitling’s current Chronomat collection presentation, reviewed for the 2026-era lineup, prominently features the Chronomat B31 Automatic 40, Chronomat B01 Chronograph 42, and Chronomat Automatic 36. The original standard all-steel Chronomat Automatic GMT 40 references are not among the visible lead models on that collection page.
That does not establish that the GMT 40 has been discontinued worldwide. It may indicate a change in collection emphasis, regional availability, or a transition between configurations. Buyers should verify the exact reference with an authorized Breitling retailer or another reputable seller rather than relying on a general search result or an old product listing.
The price history also requires careful qualification:
| Configuration or reference group | Price context | Important qualification |
|---|---|---|
| Original steel Chronomat Automatic GMT 40 | Reported U.S. introductory price of $5,600 in 2022 | Historical launch pricing; not a current quote |
| Stainless steel and platinum with black rubber strap, reference P32398101C1S1 | $8,750 on the official U.S. page reviewed in August 2026 | Before sales tax; materially different from an all-steel bracelet model |
| NFL team editions | $6,900 on the official U.S. pages reviewed in August 2026 | Before sales tax; team-colored dials, engraved casebacks, steel cases, and steel bracelets |
The current $8,750 figure should not be presented as the price of every GMT 40. It applies to the steel-and-platinum/rubber configuration identified above. The NFL editions are also separate products, not evidence that the original standard-steel references remain universally available. Geography, tax, inventory, warranty status, and whether a watch is new or pre-owned can change the actual transaction price.
Buying a new or pre-owned Chronomat GMT 40
Because the standard steel references are not prominent in the current collection overview, the exact reference matters more than the family name. A listing that says “Chronomat GMT” may describe an original steel-bracelet watch, a team edition, a steel-and-platinum model on rubber, or a pre-owned example with a changed bracelet.
If you are looking for the exact reviewed model, treat Breitling Chronomat Automatic GMT 40 as a starting point, not as proof that a listing is correct. Before paying, confirm:
- Reference number: Match the reference on the watch, warranty documents, and seller’s listing.
- Configuration: Check whether the case is all steel or includes platinum, and whether the watch has the Rouleaux bracelet or a rubber strap.
- Movement and display: Confirm that the watch has Caliber 32 and the red 24-hour GMT hand, not a different Chronomat or another Breitling GMT.
- Authenticity: Use a reputable authorized dealer or authenticated specialist marketplace, especially when the price is materially below comparable examples.
- Service history: Ask when the movement was last serviced and whether water-resistance testing was documented.
- Warranty and documents: Verify what warranty remains, whether it is transferable, and whether the serial number and paperwork agree.
- Bracelet completeness: Confirm that the original bracelet, links, clasp, and end links are included if the listing claims to be a bracelet configuration.
- Condition: Inspect rider tabs, bezel action, crown threads, bracelet pins, clasp wear, crystal edges, and case polishing.
A marketplace photograph is not enough to establish authenticity or mechanical condition. No marketplace inspection or independent condition testing was performed for this review.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Strengths and weaknesses
What the Chronomat GMT 40 does well
- Distinctive design: The rider tabs, onion crown, and Rouleaux bracelet make it instantly recognizable.
- More manageable proportions: The 40 mm case retains Chronomat character without the extra bulk of a larger chronograph.
- Useful second-time-zone display: The red GMT hand is clear, and the 24-hour scale can distinguish day from night.
- Everyday versatility: Sapphire, a screw-locked crown, screwed caseback, and 200 m water resistance support a broad daily-wear brief.
- Less visual clutter than a chronograph: The absence of sub-dials makes this the cleaner Chronomat option.
- COSC certification: Contemporary specialist coverage identifies Caliber 32 as COSC-certified, adding a formal accuracy standard to the specification.
Where it falls short
- Caller-GMT operation: The local hour hand does not jump independently, which is less convenient for frequent timezone changes.
- Modest power reserve: Approximately 42 hours is adequate but less forgiving than many newer 60- to 80-hour movements.
- Discreet GMT scale: The tone-on-tone dial treatment is elegant but less immediately readable than a high-contrast external 24-hour bezel.
- Bracelet-fit limitation: The original clasp’s reported lack of micro-adjustment may make fine sizing difficult.
- Unclear standard-reference availability: The original steel versions are not prominent in the current collection presentation, and exact inventory must be confirmed.
- Only two time zones: The bezel is not a third-time-zone GMT bezel.
Who should buy it?
The Chronomat Automatic GMT 40 makes the most sense for a buyer who wants:
- Breitling’s bold 1980s-inspired design in a relatively compact case;
- a mechanical watch that can show home time or another reference time;
- a robust, water-resistant everyday watch rather than a delicate dress GMT;
- a distinctive bracelet and bezel instead of a generic pilot-watch appearance; and
- a two-time-zone display that does not dominate the dial.
It is a weaker fit for someone who:
- changes time zones constantly and expects a flyer GMT’s independent local-hour jump;
- wants a 60-hour-or-longer power reserve;
- needs an instantly legible day/night bezel or a third-time-zone capability;
- requires extensive clasp micro-adjustment; or
- is buying solely on current list price and has not confirmed which configuration is being offered.
Travel accessories and strap changes
The watch does not require specialized travel equipment, but an automatic watch travel case is a sensible optional accessory for owners carrying it in luggage. A protective case can keep the crystal and bracelet from contacting other items during transit; it should be viewed as convenience and protection, not as a requirement for operating the GMT.
Best Value
- Rubber watch strap soft and dust-resistant , comes with a quality stainless steel buckle, which is made of stainless steel.
- Please measure the width of your watch lug before ordering. It is important that your watch's lug width is the exact width of the band you select.
- Softness is moderate, wear very comfortable,Compression molding, sturdy and ,Wearable strap/wrist strap,suitable for original watch.
- Comfortable Fit: Soft, skin - friendly rubber conforms to wrist curves. Multiple adjustment holes ensure a perfect fit for all wrist sizes, offering stable, non - tight wear.
- Easy to insert and remove,very suitable for your watch.
Strap changes are possible in principle because Breitling lists a 20 mm lug width, but this is not a guarantee that every generic strap or replacement end link will fit correctly. Avoid treating a spring-bar tool as essential buying advice. On an expensive watch, a qualified watchmaker may be the safer choice for bracelet removal, strap fitting, and checks of the spring bars or case finish.
Verdict
The Breitling Chronomat Automatic GMT 40 succeeds because it does not abandon the Chronomat’s personality in pursuit of a conventional travel-watch formula. The 40 mm case makes the collection more approachable, while the Rouleaux bracelet, rider-tab bezel, onion crown, and red GMT hand preserve its unmistakable identity.
Its compromises are equally clear. The caller-GMT layout is less convenient than a flyer GMT after a flight, the 42-hour reserve is merely adequate, the discreet scale sacrifices some at-a-glance clarity, and the original bracelet may be difficult to fine-tune. Current availability and pricing also vary substantially by reference and configuration.
For the right buyer, those are acceptable trade-offs. Choose the Chronomat GMT 40 if design, compact Chronomat proportions, water resistance, and a discreet home-time display matter more than maximum travel efficiency. If the primary goal is rapid local-time adjustment across frequent flights, the movement architecture—not the styling—is the reason to keep looking.
Frequently Asked Questions
Is the Breitling Chronomat Automatic GMT 40 a flyer GMT?
No. The Chronomat Automatic GMT 40 is a caller GMT. Its red 24-hour hand adjusts independently, while the conventional local-time hour hand does not jump independently. It is better suited to keeping home time visible than to making rapid local-time changes after every flight.
Can you swim with the Chronomat Automatic GMT 40?
The official specification is 20 bar, equivalent to 200 m or 660 ft. That supports broad everyday water use when the crown is secured and the watch is properly maintained. Water resistance can decline with gasket age, impact, or improper crown operation, so the rating is not a guarantee under every condition.
Is the Chronomat Automatic GMT 40 discontinued?
The standard all-steel references are not prominently featured in Breitling’s current Chronomat collection presentation reviewed for the 2026-era lineup, but that does not prove worldwide discontinuation. Availability should be checked by exact reference with an authorized retailer or reputable authenticated seller.
How much does the Breitling Chronomat GMT 40 cost?
Pricing depends on the configuration and date. The reported U.S. introductory price for the steel model was $5,600 in 2022. An official U.S. page reviewed in August 2026 listed the stainless-steel-and-platinum model on black rubber at $8,750 before tax, while NFL team editions were listed at $6,900 before tax.
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Bottom line: The Chronomat Automatic GMT 40 is a stylish, compact, highly recognizable everyday GMT with strong water resistance and a useful red second-time-zone hand. Buy it for the design and home-time reference; do not buy it expecting a flyer GMT, a long power reserve, or a universally available standard-steel reference.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
