The Tudor Black Bay GMT S&G (reference M79833MN) sits at the top of Tudor’s GMT lineup — a bi-material watch that pairs stainless steel with 18k yellow gold accents to deliver something neither the all-steel Black Bay GMT nor a fully gold dress watch achieves on its own. Introduced at Watches & Wonders 2022, the S&G (Steel and Gold) arrived alongside the standard Black Bay GMT but at a notably different price point and with a character entirely its own.
Today, the collection spans at least four sub-references, ranging from a classic steel-and-gold jubilee bracelet to leather straps and a “Root Beer” colorway with a brown-toned bezel insert. Prices across the line run from $5,825 to $8,125 at authorized dealers — a range wide enough that choosing the right reference genuinely matters. This guide walks through every current sub-reference, explains exactly what sets them apart, and tells you which one deserves space on your wrist.
For coverage of the standard all-steel model, see our Tudor Black Bay GMT buying guide. For the broader Tudor story, our Tudor brand hub is the place to start.
What Is the Black Bay GMT S&G?
The “S&G” designation is Tudor’s shorthand for Steel and Gold — a bi-material construction that uses 18k yellow gold for select case elements while keeping the maincase, caseback, and bracelet links in 316L stainless steel. On the Black Bay GMT S&G, the gold shows up on the outer rim of the bidirectional bezel, the crown, and the crown tube protruding from the case flank. The effect is restrained: from a distance the watch reads as steel; closer inspection reveals the warm gold tones.
The case dimensions are identical to the standard Black Bay GMT: 41mm across, 14.6mm thick, with a 22mm lug width and 200 metres of water resistance. The sapphire crystal, folded steel case back, and Tudor’s characteristic snowflake hands all carry over unchanged. What changes is the presence of that gold — and the price tag that comes with it.
The watch uses Tudor’s own manufacture movement, the MT5652, which is COSC-certified and delivers 70 hours of power reserve. Unlike a traditional GMT, the MT5652 uses a jumping local-hours mechanism: the local (second) time zone advances in one-hour increments, independent of the minute hand. This makes crossing time zones as simple as a press of the crown — no need to cycle the full 12 hours forward or backward. We cover the movement in more detail below.
Sub-Reference Breakdown: Which Model Is Right for You?
The M79833MN reference number covers the Black Bay GMT S&G family. As of October 2026, four sub-references have been identified, distinguished primarily by dial, bezel insert color, and strap or bracelet configuration.
| Sub-Reference | Dial | Bezel Insert | Bracelet/Strap | USD Retail (Oct 2026) |
|---|---|---|---|---|
| M79833MN-0001 | Black | Black/red 24-hr aluminium, gold rim | Steel and yellow gold jubilee bracelet (gold center links at 6 and 12 o’clock) | $8,125 |
| M79833MN-0002 | TBC | TBC | TBC | TBC |
| M79833MN-0003 | Black | Black/red 24-hr aluminium, gold rim | Brown and black leather strap, deployment clasp | $5,825 |
| M79833MN-0004 | Black | Brown/black “Root Beer” 24-hr aluminium, gold rim | Brown hybrid fabric/leather strap | ~$6,000–$6,500 (est.) |
M79833MN-0001 (Bracelet) — This is the flagship configuration. The integrated steel-and-gold jubilee bracelet features alternating steel and yellow gold center links arranged at the 6 and 12 o’clock positions, creating a subtle two-tone pattern when viewed from above. At $8,125, it’s the most expensive sub-reference, but it’s also the one that most fully expresses the S&G concept: the bracelet ties the gold bezel accents together visually and turns the watch into something that works with tailoring as easily as it works with a shirt and jeans.
M79833MN-0003 (Leather Strap) — The most affordable entry into the S&G family at $5,825. The brown-and-black striped leather strap with deployment clasp softens the watch’s profile considerably — it reads as a GMT explorer rather than a bi-color dress piece, despite sharing the same gold-rimmed bezel. The leather removes most of the price premium relative to the all-steel BB GMT, making it the value pick if you want the gold accents without the bracelet price.
M79833MN-0004 (Root Beer / Fabric) — Introduced alongside the original references, this variant swaps the standard black/red bezel insert for a brown and black 24-hour disc that echoes the “Root Beer” color scheme of vintage GMT watches. It ships on a brown fabric strap with leather underside. If you want something that stands apart from the standard colorway, this is it — the brown tones complement the yellow gold more naturally than the high-contrast black/red insert.
M79833MN-0002 — A fourth sub-reference appears in trade databases and loupe.watch listings, but its dial color, strap configuration, and pricing have not been publicly documented as of the time of writing. It likely debuted as a limited or regional variant. Confirm specifications with your authorized dealer before purchasing.
Full Specifications
| Specification | Detail |
|---|---|
| Reference | M79833MN |
| Case diameter | 41mm |
| Case thickness | 14.6mm |
| Case material | 316L stainless steel with 18k yellow gold accents (bezel rim, crown, crown tube) |
| Crystal | Sapphire with anti-reflective coating |
| Water resistance | 200m (20 ATM) |
| Lug width | 22mm |
| Bezel | Bidirectional rotating, 24-hour graduated aluminium insert, 18k yellow gold outer rim |
| Movement | Tudor Manufacture Calibre MT5652 |
| Chronometry | COSC-certified |
| Power reserve | Approximately 70 hours |
| Winding | Automatic, bidirectional rotor |
| GMT function | Jumping local hours (independent second time zone, hour-only advance) |
| Case back | Screw-down, engraved steel |
The Manufacture Movement: Tudor MT5652
Tudor’s calibre MT5652 is the heart of every Black Bay GMT S&G, and it earns its keep. COSC certification means the movement has been independently tested to run between -4 and +6 seconds per day — a standard that rules out most budget movements and puts it on par with certified Omega and Rolex calibres.
The 70-hour power reserve is the practical headline: fill it on a Friday evening and it’ll still be running Monday morning. That’s a significant advantage over movements with 42 or 48 hours of reserve, particularly for weekend travelers who rotate their watches.
The most useful feature for GMT purposes is the jumping local hours hand. Unlike “quick-set” GMT mechanisms that require you to advance the local hour through a full 12-hour cycle, the MT5652 lets you set the local time independently of the home time and minute hands. You push the crown to position 1, click left or right to advance or retard the local hour in single-hour increments, and push the crown back in. Crossing a time zone takes about ten seconds. The date doesn’t change with the local time — it’s tied to the home time — which is a minor inconvenience but standard on jumping-hour GMT designs.
If you want a deeper look at the movement’s architecture and how it performs against alternatives, our Tudor Black Bay GMT review covers the MT5652 in detail, including long-term accuracy data.
Pricing and Current Market Rates
The Black Bay GMT S&G launched in April 2022 at Watches & Wonders Geneva with a starting price of $4,300 for the fabric strap model and $5,550 for the jubilee bracelet. Those prices have risen substantially since launch — the bracelet reference now retails at $8,125 and the leather strap at $5,825 at US authorized dealers as of October 2026.
Secondary market pricing has followed a similar trajectory, though with more volatility. WatchCharts data from October 2026 shows the M79833MN-0001 (bracelet) trading on the secondary market broadly in line with or just below retail, which is unusual for Tudor watches historically and reflects both the bi-metal premium and current grey-market conditions.
For context, the discontinued M79733N — Tudor’s steel-and-gold diver (not a GMT) from the prior generation — is now trading at approximately $3,220 on the secondary market despite having retailed as high as $7,675 before discontinuation. This demonstrates that discontinued S&G models can decline significantly once the authorized-dealer pipeline dries up and demand normalizes. It’s relevant if you’re considering buying a pre-owned M79733N instead of the current GMT model.
For those specifically comparing the Black Bay GMT S&G to the standard Black Bay GMT, our Rolex GMT-Master II vs Tudor Black Bay GMT comparison gives useful context for where Tudor’s GMT lineup sits relative to its parent brand’s flagship.
Which Reference Should You Buy?
The decision between sub-references comes down to three factors: how you plan to wear the watch, how much of the bi-color aesthetic you want to express, and your budget ceiling.
Buy the M79833MN-0001 if: You want the full S&G experience and the bracelet is non-negotiable. The jubilee bracelet is the best bracelet Tudor has produced to date — comfortable, solid, and the right proportion for the 41mm case. The two-tone gold-and-steel links make this the most formal option in the lineup and the one most likely to draw questions from other watch people. It’s also the one most worth buying from an authorized dealer rather than grey market, as warranty matters more on a bracelet watch where clasp and link issues are possible.
Buy the M79833MN-0003 if: You want the S&G gold accents but plan to dress the watch down more often than up. The leather strap version at $5,825 saves you $2,300 over the bracelet model and wears like a different watch — more understated, more versatile across smart casual contexts. If you’re coming from the all-steel Black Bay GMT and want to step up without a dramatic price jump, the leather S&G makes the most sense. You can always add an aftermarket strap to change the look further.
Buy the M79833MN-0004 if: The standard black/red bezel doesn’t speak to you. The Root Beer colorway is a legitimate alternative aesthetic: the brown-to-black 24-hour disc and warm fabric strap lean into the vintage GMT look in a way the other references don’t. It occupies the middle of the price range and is the most differentiated option on the wrist.
If you’re less certain about committing to the GMT complication, our Tudor Black Bay buying guide covers the core diver lineup, while the Tudor history in 10 references gives a broader sense of where these watches sit in the brand’s story.
How the S&G GMT Compares to Its Competitors
At $5,825–$8,125, the Black Bay GMT S&G occupies a specific price band. The natural comparisons are the Rolex GMT-Master II in two-tone configurations (starting above $15,000 on the secondary market for the steel-and-yellow-gold “Root Beer” or “Batman” variants) and the Breitling Navitimer or similar bi-color sports watches.
Against Rolex, the Tudor wins on accessibility — its S&G variants are available at authorized dealers without wait lists, while the Rolex two-tone GMT models remain allocation-controlled and difficult to source. The movement argument also favors Tudor: the MT5652’s jumping local hours mechanism is more practical than the Rolex 3285’s traditional quick-set GMT for frequent travelers, and 70 hours of power reserve exceeds the 3285’s 70-hour reserve at the same specification level. The Rolex, however, carries more secondary market retention and a cachet the Tudor cannot entirely replicate.
Within the Tudor lineup, the S&G sits above the standard Black Bay GMT (Black Bay review for more context) and serves a distinct purpose: the gold accents make it appropriate in environments where a pure sports watch would feel under-dressed. That’s the gap it fills, and for buyers who split their time between business casual and weekend wear, it fills that gap well.
Yes, if you want a manufacture-movement GMT with bi-color aesthetics at a price point well below comparable Rolex two-tone models. The MT5652 is COSC-certified, has 70 hours of power reserve, and features a practical jumping local-hours mechanism. Authorized dealer availability is good, with no meaningful wait list as of late 2026.
Both share the same 41mm case, bidirectional gold-rimmed bezel, and MT5652 movement. The M79833MN-0001 comes on a steel-and-yellow-gold jubilee bracelet and retails at $8,125. The M79833MN-0003 comes on a brown-and-black leather strap with deployment clasp and retails at $5,825 — a $2,300 saving for the same watch on a different carrier.
Tudor’s bi-metal models hold value better than the all-steel line but are not immune to secondary market softening. The discontinued M79733N (S&G diver, not GMT) has declined to around $3,220 on the secondary market from a retail of $7,675 — a cautionary data point. Current M79833MN models are trading near retail on the secondary market, but that can change with demand and allocation conditions.
The Tudor S&G undercuts two-tone Rolex GMT-Master II models significantly on price. Rolex two-tone GMTs are allocation-controlled and sell well above retail on the secondary market. Tudor offers authorized-dealer availability, an arguably more practical jumping-hour GMT mechanism, and 70 hours of power reserve — but Rolex carries more secondary market strength and brand recognition.
The Tudor Black Bay GMT S&G has a 22mm lug width. This is a wider than average lug, which limits aftermarket strap options to 22mm-compatible straps. Tudor and third-party suppliers including Forstner and similar makers offer compatible options.
The Bottom Line
The Tudor Black Bay GMT S&G is the most complete answer to a specific question: what do you wear when you travel frequently, want a manufacture GMT movement, and want something with enough visual presence to work across smart casual and business casual contexts without owning two watches?
The bracelet reference (M79833MN-0001) at $8,125 is the full expression of the concept and the one to choose if budget allows. The leather strap (M79833MN-0003) at $5,825 is the better value proposition and the smarter daily-driver option. The Root Beer fabric strap (M79833MN-0004) is for buyers who want something distinctive and don’t need the watch to read formal.
All three share the same manufacture movement, case construction, and bi-color aesthetic — the differences are stylistic and budgetary rather than mechanical. Any of them represents a serious watch at a serious price, and Tudor’s authorized dealer network means you can buy one today, under warranty, without the secondary market premium that plagues comparable Rolex two-tone configurations.
