The Tudor Northflag GMT is the most technically ambitious GMT Tudor has ever produced: a 40mm METAS Master Chronometer certified tool watch that revives one of the brand’s cult professional references — now with a proper dual-time complication — and sells exclusively through Tudor boutiques.
Prices and specifications verified November 2026. Always confirm current pricing with your nearest Tudor boutique or authorised retailer.
TL;DR — Tudor Northflag GMT at a Glance
- Reference: M9140G1A0U-0001 (black dial, steel bracelet)
- Price: USD $5,525 (boutique-exclusive)
- Movement: MT5652-U, METAS Master Chronometer certified, 65-hour power reserve
- Case: 40mm diameter · 12.7mm thick · 48.8mm lug-to-lug · 100m water resistance
- GMT display: Fixed polished bezel + 24-hour engraved rehaut; yellow GMT hand
- Buy from: Tudor boutiques and the official Tudor website only — no grey market
- Verdict: The right GMT if METAS precision and a slim profile matter more than a rotating bezel or a lower price.
Contents
- What Is the Tudor Northflag GMT?
- Case and Design
- Dial, Hands and Legibility
- Movement and METAS Certification
- On the Wrist
- Versus the Alternatives
- Price, Availability and Resale
- Verdict
- Full Specifications
- FAQ
What Is the Tudor Northflag GMT?
The original Tudor Northflag launched in 2015 as a square-cushion case field watch with a specific purpose: to demonstrate that Tudor could match Omega’s Master Chronometer anti-magnetic standard at a lower price. It succeeded, but it was a niche product — smaller case, unconventional shape, no complications beyond time. Tudor discontinued it around 2020, yet it developed a loyal following among collectors who prized its technical credentials over the more popular Black Bay dive line.
The 2026 revival, unveiled at Geneva Watch Days, does two things at once. First, it adds a GMT complication — a genuine second time zone with an independently adjustable hour hand, which makes the Northflag dramatically more useful as a travel watch. Second, it replaces the original cushion case with a round 40mm profile that slots the watch cleanly into the modern Tudor tool-watch family alongside the Black Bay GMT and Black Bay Pro, while remaining visually distinct.
If you want the full hands-on experience and a deeper dive into the design decisions, read our full Tudor Northflag GMT review and our Geneva Watch Days coverage where we handled production examples. This guide focuses on what you need to know before committing to a purchase.
Case and Design
At 40mm across and 12.7mm thick, the Northflag GMT is the slimmest modern Tudor tool watch. For context, the Black Bay GMT 41 is a millimetre wider and meaningfully chunkier; even the flat-bezel Black Bay Pro wears taller on the wrist. Tudor’s engineers shaved 0.7mm of thickness versus the original Northflag by reworking the caseback geometry — the exhibition sapphire caseback now seats flush with the caseback edge rather than protruding.
The case is stainless steel with a considered mix of surfaces: brushed flanks and lugs for a tool-watch character, polished chamfers for formal versatility. The fixed polished bezel carries no markings — its only job is to frame the dial cleanly. This is a deliberate departure from the Black Bay GMT’s bi-directional rotating 24-hour bezel, and it changes how you use the watch. GMT function migrates entirely to the engraved and lacquered 24-hour rehaut, which runs around the inner edge of the crystal. It’s a more integrated solution aesthetically, but it requires more deliberate reading than a bezel you can rotate with your thumb.
The screw-down crown at 3 o’clock handles crown-set operations including the GMT adjustment; water resistance is rated to 100 metres (10 ATM), adequate for swimming and water sports but not diving. The lug-to-lug span of 48.8mm suits wrists in the 6.5-to-7.5-inch range without overhang.
The integrated bracelet uses fully brushed H-shaped links and a T-Fit quick-adjust clasp — a micro-adjust mechanism built into the folding clasp that lets you shift by a half-link without tools. It is genuinely useful for day-to-day wrist changes between shirt cuff and jacket sleeve, and it keeps the watch from feeling sloppy on warmer days when the wrist expands.
Dial, Hands and Legibility
The black dial uses monobloc ceramic hour markers — each index is a single moulded ceramic piece, not a pad-printed line, so they catch light differently and give the dial subtle tactile depth that photographs rarely capture. The central hour and minute hands follow Tudor’s Northflag sword pattern: long, bevelled, and lacquered rather than polished, which reduces reflective glare under direct light without sacrificing legibility.
All applied indices and the sword hands carry Super-LumiNova for low-light reading — Tudor does not publish the specific grade, but on-wrist performance is comparable to the Black Bay line. The GMT hand is bright yellow, highly visible against the black dial and easy to track at a glance. The seconds hand also runs in yellow, which creates a deliberately energetic aesthetic; buyers with a preference for visual restraint may find two yellow hands busy.
One honest limitation: the GMT hand carries no lume. In a pitch-dark room you cannot read the home-time hour by feel alone — you need to orient by the lumed main hands and then locate the yellow hand visually. It is a minor frustration for anyone who uses the GMT function at night.
The date window sits at 3 o’clock — a white disc on black background, crisp and easy to read without magnification. The 24-hour rehaut is engraved and lacquered rather than pad-printed, which means it remains legible even after years of normal use. Legibility overall is excellent in daylight and good in low light, placing the Northflag ahead of most dress watches and on par with the Black Bay GMT.
Movement and METAS Certification
The MT5652-U is Tudor’s in-house GMT movement and the centrepiece of the Northflag’s value proposition. The “U” suffix designates METAS Master Chronometer certification — the same standard that Omega introduced with the Master Chronometer programme in 2014 and which subjects a movement to an independently verified battery of tests including magnetic resistance, rate accuracy, and power-reserve measurement.
In practical terms, METAS certification requires the movement to maintain rate accuracy between 0 and +5 seconds per day across six positions and in magnetic fields up to 15,000 gauss. Standard COSC chronometer certification (which the Black Bay GMT holds) requires ±4 seconds per day in laboratory conditions, tested on the movement alone before casing. METAS tests the cased watch — a more demanding standard — and the 0/+5 range is tighter than COSC’s ±4 in its upper bound. For context, everyday magnetic fields from phone speakers, bag clasps, and laptop covers rarely exceed 100 gauss; 15,000-gauss resistance offers substantial headroom. For a deeper look at Tudor’s calibre family, see our Tudor manufacture calibres explainer.
Power reserve sits at 65 hours — comfortably enough for a long weekend off the wrist. The movement is visible through the exhibition sapphire caseback, with an engraved and lacquered rotor. The GMT function uses an independently adjustable home-time hour hand, meaning you can change the local time in one-hour increments via the crown without interrupting the seconds display — a proper traveller’s implementation.
No other current Tudor GMT holds METAS certification. If movement credentials matter to you, the Northflag’s MT5652-U is the only way to get them in a Tudor.
On the Wrist
The 40mm diameter and 12.7mm profile make the Northflag GMT genuinely versatile: slim enough to disappear under a dress shirt cuff, substantial enough to read comfortably on a 7-inch wrist. The 48.8mm lug-to-lug measurement will feel at home on most adult wrists; the integrated bracelet hugs the wrist rather than bridging across it, distributing the weight well.
Using the GMT complication requires a moment of learning. With the Black Bay GMT’s rotating bezel, setting a second time zone is a one-finger operation — rotate the bezel, line up the 24-hour mark, read off. With the Northflag, you set the GMT hand via the crown and then read the home time off the rehaut. It takes a few days to become instinctive but is not a daily inconvenience once learned. The rehaut scale is well-engraved and positioned at a readable angle.
Day-to-day wearability is high. The brushed bracelet resists showing fine scratches better than a polished finish, the screw-down crown adds confidence for swimming, and the T-Fit clasp means the watch moves from desk to gym bag to evening without loose rattling. For a realistic picture of long-term ownership costs — including service intervals — our Tudor cost-to-own guide has the full breakdown.
Versus the Alternatives
The Northflag GMT’s closest rivals range from within the Tudor family to watches costing twice as much. Here’s how it compares on the key parameters buyers weigh:
| Watch | Case | Movement | GMT Type | Approx. Price |
|---|---|---|---|---|
| Tudor Northflag GMT | 40mm / 12.7mm | MT5652-U, METAS | Fixed bezel + rehaut | USD $5,525 |
| Tudor Black Bay GMT 41 | 41mm / ~14mm | MT5652, COSC | Rotating 24h bezel | ~USD $4,425 |
| Tudor Black Bay Pro | 39mm / ~14mm | MT5652, COSC | Rotating 24h bezel | ~USD $4,975 |
| Omega Aqua Terra GMT | 41mm | Cal. 8938, METAS | Jumping local hour | ~USD $8,100 |
| Rolex GMT-Master II | 40mm | Cal. 3285, COSC | Rotating 24h ceramic bezel | USD $12,350+ (waitlist) |
The Black Bay GMT 41 is the obvious starting point: it costs $1,100 less, offers the same in-house GMT movement family, and provides a rotating bezel that many users find more intuitive. The trade-off is COSC certification rather than METAS, a larger case, and a chunkier profile. If you prefer a rotating bezel or the $1,100 matters, the Black Bay GMT wins on value. The Black Bay Pro is an attractive alternative for buyers who want a pilot-watch aesthetic with the same movement family.
The Omega Aqua Terra GMT offers METAS certification at a higher price, with a jumping local-hour hand that displays local time in AM/PM rather than 24-hour format — a genuine usability difference depending on preference. The Rolex GMT-Master II is the benchmark against which most buyers measure any premium GMT, but availability at retail is effectively nil for most buyers, making grey-market pricing the practical reference. The Northflag GMT sits well below both and offers METAS credentials that the Rolex does not.
Price, Availability and Resale
At USD $5,525, the Tudor Northflag GMT commands a meaningful premium over the rest of the Tudor GMT lineup — it is the most expensive Tudor GMT currently in production. That price is set by Tudor at boutiques and the official Tudor website; unlike much of the Tudor catalogue, the Northflag does not appear at authorised dealers outside of Tudor’s own retail network.
Boutique-exclusivity has practical implications. You cannot walk into a multi-brand retailer and compare the Northflag against an Omega or Longines the same afternoon. You will need to visit a Tudor boutique or order through tudor.com — stock levels vary by city. In markets where Tudor boutique presence is thin, waiting times of several weeks are possible depending on the time of year. There is no authorised grey market for a boutique-exclusive model by definition, which also means the secondary market has limited supply.
On resale, Tudor’s modern in-house movement watches have shown stronger secondary-market retention than the older ETA-powered models, though they remain below Rolex levels. Our Tudor resale value analysis covers the full data picture, including how METAS certification affects secondary prices versus COSC-certified references. For the Northflag specifically, boutique exclusivity limits supply on the secondary market, which has tended to support — rather than suppress — resale prices for comparable Tudor references. The Black Bay 58 price history offers a useful parallel for how boutique-supply dynamics play out over time.
Verdict: Who Is the Northflag GMT For?
The Tudor Northflag GMT is a watch with a clear value proposition and an equally clear set of compromises. Buy it if: you want METAS Master Chronometer certification in a GMT watch without stretching to Omega pricing; you prefer a slimmer profile than the Black Bay GMT 41; you value the cleaner aesthetic of a fixed bezel over the toolbox utility of a rotating one; and you are comfortable buying exclusively through Tudor boutiques.
Look elsewhere if: the rotating bezel matters for quick time-zone switching; the $1,100 premium over the Black Bay GMT is hard to justify for a feature set that is similar in daily use; or you want the largest possible authorised dealer network for after-sales support.
The Northflag GMT occupies a genuine gap in the market: a METAS-certified, slim, tool-watch-aesthetic GMT at a price well below the Omega Aqua Terra GMT and planets away from the Rolex GMT-Master II. If those coordinates match what you are looking for, it is difficult to argue with the execution. Tudor’s reputation for value-led watchmaking is well-earned, and the Northflag GMT is the fullest expression of that philosophy applied to a complication watch.
Full Specifications
| Specification | Detail |
|---|---|
| Reference | M9140G1A0U-0001 |
| Case diameter | 40mm |
| Case thickness | 12.7mm |
| Lug-to-lug | 48.8mm |
| Case material | Stainless steel (brushed and polished) |
| Crystal | Sapphire (front and caseback) |
| Water resistance | 100m / 10 ATM |
| Movement | MT5652-U, in-house manufacture |
| Certification | METAS Master Chronometer |
| Accuracy | 0/+5 sec/day |
| Magnetic resistance | 15,000 gauss |
| Power reserve | 65 hours |
| GMT function | Independent home-time hour hand; 24-hour rehaut |
| Dial | Black; monobloc ceramic hour markers |
| Hands | Sword (Northflag pattern); Super-LumiNova; yellow GMT hand |
| Bracelet | Integrated 2-link brushed steel; T-Fit micro-adjust clasp |
| Retail price | USD $5,525 (boutique-exclusive) |
Frequently Asked Questions
For most buyers, it depends on two things: whether METAS certification matters to you, and whether you prefer a fixed-bezel GMT interface. The Northflag GMT costs approximately $1,100 more than the Black Bay GMT 41 and offers METAS Master Chronometer certification (0/+5 sec/day, 15,000-gauss magnetic resistance) versus the Black Bay GMT’s COSC standard. It is also slimmer at 12.7mm versus approximately 14mm. If those differences are priorities, the premium is justified. If you want a rotating bezel and a lower price, the Black Bay GMT wins on value.
The Tudor Northflag GMT is boutique-exclusive, meaning it is sold only through Tudor’s own boutiques and the official Tudor website (tudor.com). It is not available at multi-brand authorised dealers or grey-market retailers. Stock levels vary by city — contact your nearest Tudor boutique to check availability or place an order.
METAS (the Swiss Federal Institute of Metrology) independently tests movements to a standard above standard COSC chronometer certification. METAS requires the cased watch to maintain rate accuracy between 0 and +5 seconds per day and to demonstrate resistance to magnetic fields of up to 15,000 gauss. The Northflag GMT is the only current Tudor GMT with METAS certification — the Black Bay GMT and Black Bay Pro are COSC-certified. For everyday use, METAS means the watch will be accurate and unaffected by the magnetic fields you encounter in normal life.
The 40mm diameter and 48.8mm lug-to-lug measurement suits most adult wrists in the 6.5-to-7.5-inch range without overhang. The integrated bracelet with T-Fit micro-adjust clasp makes it easy to dial in the right fit. The 12.7mm thickness is slim by tool-watch standards and should fit comfortably under most dress and casual shirt cuffs.
No. The yellow GMT hand does not carry Super-LumiNova or any photoluminescent treatment. In low-light conditions, you identify the home time by locating the brightly yellow-coloured hand visually rather than by feel. All hour and minute hands, and the applied dial indices, do carry Super-LumiNova, so the main time display is fully legible in the dark.
The Northflag GMT uses an independently adjustable home-time hour hand combined with a 24-hour scale engraved into the inner rehaut (the ring between the dial edge and the crystal). To set a second time zone, you pull the crown to the GMT-hand position and advance or retract the home-time hour hand in one-hour increments. The main local time and date continue running without interruption. You then read the home time against the 24-hour rehaut scale. Unlike the Black Bay GMT’s rotating 24-hour bezel, the rehaut is fixed — which is visually cleaner but requires reading the graduated scale rather than rotating a bezel ring.
Tudor watches generally retain value better than many Swiss mid-range brands, and in-house movement models have shown stronger secondary-market retention than older ETA-powered Tudor references. The Northflag GMT’s boutique-exclusive distribution limits secondary supply, which has historically supported resale prices for comparable limited-distribution Tudor models. For detailed resale data across the Tudor range, see our Tudor resale value analysis.
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