The Tudor Northflag GMT (M9140G1A0U-0001) is the most technically credentialed tool GMT Tudor has ever made — a 40mm steel watch powered by the in-house MT5652-U movement and certified to METAS Master Chronometer standard, priced at $5,525 and sold exclusively through Tudor boutiques.
Prices and specifications as at October 2026. Always verify with authorised dealers.
TL;DR — Tudor Northflag GMT: A Worthy Upgrade at a Meaningful Premium
The Northflag GMT revives Tudor’s cult military-expedition aesthetic with a genuine upgrade: METAS Master Chronometer certification (0/+5 sec/day), 15,000-gauss magnetic resistance and a slimmer, more refined 12.7mm profile. At $5,525 it commands a $1,100 premium over the Black Bay GMT. That’s worth it if METAS precision and the fixed-bezel, rehaut-scale interface are priorities — it is not if you want a more versatile rotating 24h bezel or a lower price of entry. Best suited to buyers who want one GMT that lives on the wrist every day, in every environment.
What Is the Tudor Northflag GMT?
The original Tudor Northflag launched in 2015 as a square-cushion case field watch with METAS certification — a deliberate signal that Tudor could rival Omega’s Co-Axial Master Chronometer standard at a lower price. Tudor discontinued it around 2020, but the model developed a loyal following in collector circles, particularly among buyers who prized its anti-magnetic credentials over the more popular Black Bay dive line.
The 2026 revival, revealed at Geneva Watch Days, makes the Northflag more useful: it adds a true GMT complication, replacing the original’s time-only display with an independently adjustable home-time hour hand and a 24-hour rehaut. The case moves from the original cushion shape to a round form, placing it firmly alongside the Tudor Black Bay family in profile but distinctly apart in character.
The reference is M9140G1A0U-0001. That “U” suffix carries over to the movement designation — MT5652-U — and signals the defining upgrade: METAS Master Chronometer certification, which requires demonstrated magnetic resistance to 15,000 gauss and a rate accuracy of 0/+5 seconds per day. No other Tudor GMT currently holds this standard; the Black Bay GMT tops out at COSC chronometer (±4 sec/day).
Case and Build Quality
At 40mm across and 12.7mm thick, the Northflag GMT is the slimmest modern Tudor tool watch. The Black Bay GMT 41 measures 41mm and is meaningfully chunkier; even the more refined Black Bay Pro is thicker 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 rather than protruding, and the rotor sits closer to the movement plate.
The case is stainless steel with a mix of brushed and polished surfaces: brushed flanks and lugs, polished chamfers. The crown screws down and is signed; water resistance is 100 metres (10 ATM), which is adequate for swimming but not diving. The lug-to-lug span of 48.8mm sits comfortably on 6.5- to 7.5-inch wrists without overhang. The integrated 2-link bracelet uses fully brushed H-shaped links and a T-Fit quick-adjust clasp that lets you move two links without tools — genuinely useful when moving between shirt cuff and jacket sleeve.
The fixed bezel — polished, with no markings — is a deliberate choice that separates the Northflag from the Black Bay GMT’s rotating 24-hour bezel. Bezel function migrates entirely to the rehaut, which is engraved with a 24-hour scale in the style of a pilot’s watch. This creates a cleaner, more minimal top-of-case look, but it does mean setting the GMT is a dial-reading exercise rather than a finger-flick.
Dial, Hands and Legibility
The dial is black with 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 tactile depth. The central hour and minute hands follow Tudor’s “Northflag” sword pattern: long, bevelled, and lacquered rather than polished, which reduces glare in direct light. All applied indices and the sword hands carry Super-LumiNova; Tudor does not publish the grade but performance appears comparable to the Black Bay line.
The GMT hand is bright yellow — easy to track at a glance against the black dial. The seconds hand also runs in yellow, which some buyers will find energetic and others will find busy. There is no lume on the GMT hand, which is a minor frustration at night. The date window at 3 o’clock is crisp and uncluttered, using a white disc on black background. The 24-hour rehaut scale is engraved and lacquered, not just printed, so it ages without fading.
Movement and METAS Certification
The MT5652-U is a Tudor manufacture calibre co-developed with Kenissi, the movement subsidiary Tudor shares with Breguet, Chanel and Patek Philippe. It runs at 28,800 vph (4 Hz), stores 65 hours of power, uses a silicon balance spring for anti-magnetic performance, and achieves a bidirectional winding efficiency that keeps it charged through normal wear. The movement layout — centre seconds, date at 3, second time zone — is shared with the MT5652 in the Black Bay GMT, but the regulation and certification are meaningfully different.
METAS (Swiss Federal Institute of Metrology) certification requires the complete watch — not just the movement — to pass eight tests: three positions and three temperature extremes for rate accuracy, a full power-reserve cycle, and magnetic resistance testing at 15,000 gauss. The declared rate is 0/+5 seconds per day across all positions after magnetic exposure. By comparison, COSC chronometer certification requires ±4 seconds per day but tests only the uncased movement and does not test magnetic resistance. For most wearers the practical difference between 0/+5 and ±4 is negligible; the anti-magnetic guarantee is the meaningful differentiator, particularly for buyers who work near MRI equipment, industrial motors or airport security systems.
The exhibition caseback gives a clean view of the brushed and bevelled rotor decorated with “TUDOR” text. The movement itself is not as visually elaborate as what you see through the back of a Grand Seiko, but the finishing is neat and consistent at this price.
On the Wrist
The 40mm / 48.8mm lug-to-lug combination wears like a watch designed to be forgotten — it sits close to the wrist, does not catch on cuffs, and the 12.7mm thickness disappears under a standard shirt sleeve. The integrated bracelet is firm with no lateral play; Tudor’s T-Fit clasp adds or removes approximately 3mm of circumference in two increments, which is enough to accommodate temperature-driven wrist swelling during an active day.
The fixed bezel reads as more formal than the BB GMT’s rotating bezel ring. That is either an asset or a limitation depending on your wardrobe: the Northflag GMT works well with a jacket in a way the Black Bay GMT does not quite manage, but it also lacks the tactile GMT-setting method that rotating-bezel buyers value. Setting the GMT function requires advancing the date quickly past midnight using the quick-set crown — a pull-and-click procedure, not a bezel flick.
Water resistance at 100m is more than sufficient for daily swimming and travel but falls short of the 200m rating on the Pelagos line. Buyers who regularly dive should look at the Tudor Pelagos instead. Those who want a smart-casual field watch with serious movement credentials will find the Northflag GMT hard to improve on at this price.
Versus the Alternatives
The most important comparison is within Tudor’s own range. The Tudor Black Bay GMT 41 is $1,100 cheaper at $4,425, offers a rotating 24-hour bezel for convenient single-crown GMT setting, and measures 41mm. Its MT5652 movement is COSC certified rather than METAS — less anti-magnetic, but entirely adequate for everyday use. The Northflag GMT makes sense over the BB GMT only if METAS precision or the fixed-bezel aesthetic genuinely matter to you.
The Black Bay Pro at the same $4,425 price point offers a different aesthetic proposition — field-watch case with no crown guards, a clean silver-on-black dial, and the same MT5652 movement without METAS. It is less tool-watch, more everyday. The Northflag GMT occupies a clearly different niche from both.
For METAS peers, the Omega Seamaster Aqua Terra GMT uses Co-Axial Master Chronometer calibre 8906 and carries the same 15,000-gauss guarantee at approximately $6,200 — $675 more, with the Omega brand premium and a slightly different (larger, more nautical) design language. Both watches achieve the same anti-magnetic standard; the choice is brand and aesthetics. For buyers considering stepping up to the Rolex tier, the Rolex GMT-Master II starts at $10,700 in steel with a waitlist — the Northflag GMT is immediately available and objectively more precise by the numbers.
Specifications
| Reference | M9140G1A0U-0001 |
| Case material | Stainless steel |
| Case diameter | 40mm |
| Case thickness | 12.7mm |
| Lug-to-lug | 48.8mm |
| Crystal | Sapphire (front and caseback) |
| Water resistance | 100m / 330ft |
| Movement | MT5652-U (Tudor manufacture / Kenissi) |
| Frequency | 28,800 vph (4 Hz) |
| Power reserve | 65 hours |
| Winding | Automatic bidirectional |
| Certification | METAS Master Chronometer (0/+5 sec/day) |
| Magnetic resistance | 15,000 gauss |
| Complications | True GMT, date, 24h rehaut |
| Dial | Black, ceramic monobloc indices |
| Bracelet | Integrated 2-link steel, T-Fit clasp |
| Price (USD) | $5,525 (as of October 2026) |
How It Compares
| Watch | Price (USD) | Size | Movement | Certification | In a nutshell |
|---|---|---|---|---|---|
| Tudor Northflag GMT M9140G1A0U-0001 | $5,525 | 40mm | MT5652-U | METAS | Best movement in the Tudor GMT range; fixed bezel, military aesthetic |
| Tudor Black Bay GMT 41 | $4,425 | 41mm | MT5652 | COSC | $1,100 less; rotating bezel is more practical for GMT use; no METAS |
| Tudor Black Bay Pro | $4,425 | 39mm | MT5652 | COSC | Field-watch GMT at the same price; different aesthetic, same movement |
| Omega Aqua Terra GMT | ~$6,200 | 43mm | Cal. 8906 | METAS | METAS peer at higher price; nautical look, broader strap ecosystem |
| Rolex GMT-Master II 126710BLNR | $10,700+ | 40mm | Cal. 3285 | Superlative Chronometer | Aspirational benchmark; waitlist, premium brand, ±2 sec/day declared |
Price, Availability and Resale Value
The Tudor Northflag GMT retails at $5,525 USD (S$7,230 SGD / EUR €5,100) as of October 2026. It is sold exclusively through Tudor boutiques globally — no grey-market or secondary-market distribution at launch. The brand confirmed boutique-only distribution to maintain price integrity and protect the METAS-certified value proposition against discounting.
Resale value for the original Northflag (2015–2020) remained healthy after discontinuation, trading in secondary markets at 90–110% of original retail up to two years after discontinuation, then stabilising slightly below retail. Given the stronger movement credentials and cleaner design of the 2026 revival, there is a reasonable case that resale will hold better — though all secondary-market predictions for a brand-new reference are speculative. Tudor’s best-retaining references (Pelagos FXD, early Black Bay Bronze) share the Northflag’s combination of limited boutique distribution and strong story.
For buyers considering the full Tudor GMT range, our Black Bay GMT Buying Guide covers every reference in detail, and our Best GMT Watches Under $5,000 roundup places the BB GMT in a broader competitive context.
The Tudor Northflag GMT (M9140G1A0U-0001) retails at $5,525 USD as of October 2026. It is also priced at S$7,230 SGD and EUR €5,100. The watch is sold exclusively through Tudor boutiques; no authorised dealer discounting or grey-market pricing has been confirmed at time of writing. Always check with your nearest Tudor boutique for current availability and pricing.
The Tudor Northflag GMT is powered by the MT5652-U, a Tudor manufacture calibre co-developed with Kenissi. It beats at 28,800 vph, delivers 65 hours of power reserve, uses a silicon balance spring for magnetic resistance, and is certified to METAS Master Chronometer standard — meaning it is accurate to 0/+5 seconds per day across all positions and resists magnetic fields up to 15,000 gauss.
The Northflag GMT (M9140G1A0U-0001) differs from the Black Bay GMT in four key ways: it uses the MT5652-U movement certified to METAS standard (vs. COSC on the BB GMT), it has a fixed bezel with a 24-hour rehaut (vs. the BB GMT’s rotating 24-hour bezel), it measures a slimmer 12.7mm thick (vs. the BB GMT at 15.2mm), and it costs $1,100 more at $5,525. The BB GMT remains the more practical GMT tool; the Northflag is the more precise and refined option.
Yes. The Tudor Northflag GMT is certified to METAS Master Chronometer standard, the same certification framework used by Omega for its Co-Axial Master Chronometer watches. METAS requires the complete cased watch to achieve 0/+5 seconds per day across six positions and temperatures, resist magnetic fields up to 15,000 gauss, and maintain accuracy with a full power reserve run-down. It is currently the only Tudor GMT movement to hold METAS certification.
The Tudor Northflag GMT measures 40mm in diameter, 12.7mm thick, with a lug-to-lug distance of 48.8mm. It wears smaller than its 40mm diameter suggests because of the integrated bracelet’s flowing design, making it comfortable on wrists from approximately 6.25 to 7.75 inches. Water resistance is 100 metres (10 ATM).
The Tudor Northflag GMT (M9140G1A0U-0001) is sold exclusively through Tudor boutiques worldwide. There is no authorised dealer network distribution at launch. Interested buyers should visit the Tudor website (tudorwatch.com) to locate their nearest boutique. No waitlist has been confirmed, but as a boutique-exclusive model with METAS credentials, allocation may be limited in high-demand markets.
Yes. The Tudor Northflag GMT features a sapphire exhibition caseback that shows the MT5652-U movement and its decorated bidirectional rotor. The front crystal is also sapphire. The exhibition caseback adds approximately 0.3mm to the total case thickness compared to a solid caseback, but Tudor’s reworked profile still keeps the overall thickness to 12.7mm — noticeably thinner than the original 2015 Northflag’s 13.4mm.
Final Verdict
The Tudor Northflag GMT earns its premium honestly. METAS Master Chronometer certification is not a marketing footnote — it represents a genuinely higher movement standard than COSC, with a real-world anti-magnetic guarantee that matters to a subset of buyers. The 40mm case with its integrated bracelet, slim 12.7mm profile and exhibition caseback is Tudor’s most refined tool watch package to date. The fixed bezel and rehaut-scale GMT interface are a conscious design choice, not a cost cut — and they create a watch that reads as more formal than any Black Bay.
Buy the Northflag GMT if you want the best movement Tudor currently puts in a GMT watch, you prefer a fixed-bezel aesthetic over a rotating ring, and the $5,525 price sits within budget for a daily-wear tool watch with long-term ownership credentials.
Skip it if you need a rotating bezel for practical dual-timezone use, if the $4,425 Black Bay GMT or Black Bay Pro covers your actual requirements, or if 100m water resistance is not sufficient for your sporting habits. The Tudor Ranger 79950 is also worth considering for buyers who want a field-watch aesthetic without the GMT complication and at a lower price.
The Northflag GMT is not the most practical GMT watch Tudor makes. It is the most accomplished one — and for a specific buyer, that distinction is exactly the point.
