⚡ TL;DR — Tudor Black Bay 41 Quick Take
- Best all-rounder: M7941A1A0NU-0001 (black dial, steel bracelet) — the watch that does everything at $5,325
- Best value: Pre-owned M79230N-0009 — same 41mm case, COSC in-house, from ~$2,800 used
- Skip if: You want a thin dress-diver; the 12.9 mm profile is solidly tool-watch territory
- Buy instead: BB58 buying guide if 39 mm wears better on your wrist
Tudor’s Black Bay line is one of the most crowded in modern watchmaking — BB58, BB68, Pelagos 39, GMT — and right in the middle sits the model most buyers overlook: the Black Bay 41. Bigger than the BB58, more traditional than the Pelagos, and cheaper than anything Rolex offers with comparable specs, the BB41 lands in a strange pocket where it is simultaneously the most versatile Black Bay and the least talked-about one. This guide covers every current reference, real 2026 street prices, exactly how the movement stacks up, and what to watch for when buying pre-owned. For our deep-dive into wearability and design, see the full Tudor Black Bay 41 review.
At a Glance: Key Specs
| Spec | Current (M7941A) | Classic (M79230N) |
|---|---|---|
| Case diameter | 41 mm | 41 mm |
| Case thickness | ~13 mm | 12.9 mm |
| Lug-to-lug | ~47.5 mm | 47.8 mm |
| Lug width | 22 mm | 22 mm |
| Movement | MT5400 series | MT5402 (COSC) |
| Power reserve | 70 h | 70 h |
| Water resistance | 200 m / 660 ft | 200 m / 660 ft |
| Crystal | Domed sapphire, AR | Domed sapphire, AR |
| Bracelet weight | ~148 g (steel) | ~148 g (steel) |
| MSRP from (2026) | ~$5,325 | Discontinued / pre-owned |
Prices are indicative as of October 2026. Always confirm with an authorised Tudor retailer — street prices, promotions, and reference availability vary by market.
The Case for the BB41 in 2026
The Black Bay 41 occupies a genuinely awkward position in Tudor’s catalogue — and that awkwardness is actually its strongest selling point. At 41 mm it is one millimetre larger than the BB58’s 39 mm but three millimetres smaller than the original Black Bay’s 41 mm case, which makes it the middle-ground option that suits the widest range of wrists. It wears closer to a 39 mm watch than the lug-to-lug suggests, because the broad satin-brushed flanks visually compress the case on the wrist. What you get for the extra size is a properly legible dial, a meatier presence on larger wrists, and — critically — a watch that reads as purposeful tool rather than dress-diver hybrid. For buyers on the fence between the compact BB58 and the heftier Pelagos 39, the BB41 is frequently the answer they did not know existed.
Reference Numbers: Which BB41 Should You Buy?
Tudor revised its reference numbering system across the Black Bay line in recent production runs. Understanding both systems helps whether you are shopping new or pre-owned. The current production series carries the M7941A prefix, while the earlier and still-plentiful pre-owned generation uses M79230. Both are genuine in-house movements, COSC-certified, and functionally nearly identical — the differences are incremental refinements, not generational leaps.
Current Production (M7941A Series)
The M7941A1A0NU-0001 is the reference you will find at authorised dealers today. It pairs a black dial with Tudor’s signature snowflake hands and the steel Oyster-style bracelet. The lacquered black dial is highly legible under the domed, double AR-coated sapphire crystal, and the applied indices create depth without fussiness. A second configuration (M7941A1A0NU-0003) offers an aged-effect brown leather strap option for buyers who prefer a more classical presentation. Prices start at approximately $5,325 on a bracelet in Singapore and comparable markets as of late 2026 — confirm with your local AD as price lists are updated periodically.
Pre-Owned Generation (M79230N Series)
The earlier M79230N family — M79230N-0009 (black dial), M79230N-0010 (oxblood/burgundy dial), and the dark blue variant — remains widely available on the secondary market and represents some of the best value in Tudor’s lineup. These references run the MT5402 calibre with COSC chronometer certification and the same 70-hour power reserve. With pre-owned examples now trading from around $2,800 to $3,400 in good condition, they undercut new retail by a significant margin while offering identical functional specs. The burgundy M79230N-0010 in particular attracts collectors drawn to its Heritage Chrono colour echoes. See our full Tudor brand guide for the complete model history.
Movement: What You Are Actually Getting
Both BB41 generations run calibres from Tudor’s MT5400 series — the in-house manufacture family the brand developed to move away from ETA and Breitling-sourced ebauches. The MT5402 in the M79230N generation runs at 28,800 vph (4 Hz), carries a silicon hairspring (paramagnetic, non-magnetic, no lubricant needed at the escapement), and is COSC-certified to ±4 seconds per day. Power reserve is 70 hours — more than enough for a long weekend off the wrist.
Service intervals should be planned every 5–7 years. A full Tudor service in Singapore typically runs SGD 750–900 depending on the service centre and whether parts are needed. Unlike Omega’s METAS certification, COSC certification does not include magnetic resistance testing above 15,000 A/m, but the silicon balance spring means the BB41 performs well in everyday magnetic environments such as tablet covers and bag closures. For buyers requiring ISO 764 anti-magnetic performance, the movement is not rated to that standard — the Pelagos LHD is a better choice in that case.
Sizing: Who the BB41 Actually Fits
The 47.8 mm lug-to-lug measurement is the critical figure. On a 6.5-inch (165 mm) wrist, the BB41 will overhang the lugs noticeably but remains wearable — most owners with this wrist size report comfortable daily wear. On a 7-inch (178 mm) wrist it sits perfectly. Below 6.25 inches, seriously consider the Black Bay 58 instead: the BB58’s 40.9 mm lug-to-lug is a genuinely different experience at that wrist size. The 22 mm lug width is wide enough that NATO and rubber strap options are plentiful — Tudor supplies a fabric strap in most markets, and aftermarket options in canvas, NATO, and rubber add versatility. At 12.9 mm thick the BB41 will not disappear under a dress shirt cuff, but it wears comfortably under a jacket sleeve.
How the BB41 Compares: Sizing Up the Competition
| Watch | Case (mm) | L2L (mm) | Movement | Price (new) |
|---|---|---|---|---|
| Tudor BB41 | 41 | 47.8 | MT5402 / COSC | ~$5,325 |
| Tudor BB58 | 39 | 40.9 | MT5402 / COSC | ~$3,775 |
| Tudor BB68 | 39 | 47.7 | MT5400 | ~$3,675 |
| Rolex Submariner | 41 | 48.0 | Cal 3235 / COSC | ~$10,250 |
| Omega Planet Ocean 39.5 | 39.5 | 46.8 | Cal 8800 / METAS | ~$6,800 |
The most natural comparison is with the Rolex Submariner — both are 41 mm steel divers, both carry COSC chronometer certification, both use oyster-style bracelets. The Submariner’s Cal 3235 is a more refined movement with a 70-hour power reserve and Rolex’s Superlative Chronometer rating (±2 s/day actual regulation, more demanding than COSC). But the premium — roughly $5,000 at new retail — buys you the Rolex name, fractionally better precision, and resale value that Tudor cannot match. If resale value matters, buy the Submariner. If wearing value matters, the BB41 wins. The Omega Planet Ocean 39.5 is the other major competitor: METAS-certified Master Chronometer movement, 600 m water resistance, and ISO 764 magnetic resistance, but at $6,800+ it costs more than the BB41 for a slightly smaller case.
Buying Pre-Owned: What to Check
The M79230N generation is a strong pre-owned buy, but a few checks protect you. First, verify the bracelet end links: authentic Tudor end links are solid, not hollow, and the push-button diver extension should click positively through five micro-adjustment positions. Second, check the crown: it should screw down smoothly with no cross-threading or wobble. Third, examine the bezel: the aluminium insert should be crisp with no lifting at the edges — bezel replacement on a BB41 runs approximately SGD 350–450 at a Tudor service centre, so a worn insert is a negotiating point. Fourth, request the Tudor warranty card and original box if available — full set examples command a 10–15% premium but sell faster if you ever choose to resell. Finally, confirm that the caseback shows the correct reference engraving and that it has not been opened improperly — look for scratches around the caseback grooves. See our pre-owned Tudor Black Bay guide for a full authentication checklist.
Where to Buy the Tudor Black Bay 41
For new purchases, buy only from authorised Tudor retailers — Tudor’s warranty (five years, extendable to eight years with online registration) is non-transferable from grey market dealers, and service coverage can be refused on grey-market purchases. In Singapore, authorised retailers include The Hour Glass, Cortina Watch, and The Sedap Watches. Internationally, Watches of Switzerland and Tourneau / Bucherer carry the full current range. For pre-owned, Chrono24 and WatchBox offer buyer protection on authenticated examples. Avoid unverified private listings without provenance documents for M79230N watches unless you can inspect in person. Tudor watches are not sold through the Amazon Marketplace — any listing there is grey market or counterfeit.
Frequently Asked Questions
Yes, for buyers who want a serious 41 mm steel diver with an in-house, COSC-certified movement and 200 m water resistance without the Rolex price premium. At roughly $5,325 new — or under $3,000 pre-owned (M79230N generation) — it offers more calibre value per dollar than almost any competitor at this size. The caveat: Rolex outperforms it on resale value, and the Omega Planet Ocean edges it on movement precision and magnetic resistance.
The BB58 measures 39 mm in diameter with a 40.9 mm lug-to-lug — significantly more compact on the wrist. Both use the MT5402 movement and the same 200 m water resistance. The BB41 suits wrists above 6.5 inches; the BB58 is the correct choice for wrists below that threshold or buyers who want a slimmer under-cuff profile. The BB41 also offers slightly more dial real estate, which improves legibility at a glance.
Yes. The MT5402 calibre in the M79230N generation and the MT5400 series calibres in the current M7941A generation both carry COSC chronometer certification, meaning they are independently tested to ±4 seconds per day. In practice, most examples regulate to better than ±2 seconds per day out of the box. The movement also features a silicon hairspring, which resists magnetism and temperature variation without requiring lubrication at the escapement.
Both are 41 mm steel divers with COSC credentials, but the Rolex Submariner costs approximately $10,250 new — nearly double the BB41’s retail price. The Submariner’s Cal 3235 is a more refined movement regulated to ±2 s/day (Rolex’s internal Superlative Chronometer standard), and it holds resale value significantly better. Choose the Submariner if long-term value retention matters. Choose the BB41 if you want maximum specification for your budget and prioritise wearing the watch over selling it.
A full service at an authorised Tudor service centre in Singapore typically runs SGD 750–900, including movement service, pressure testing, and bracelet polishing. Parts such as a bezel insert replacement (SGD 350–450) or crystal replacement (SGD 280–380) are charged separately. Tudor recommends servicing every 5–7 years under normal use conditions. The silicon hairspring eliminates escapement lubrication as a service item, which modestly extends the interval compared to traditional lever escapements.
The BB41 uses a 22 mm lug width, which is wide but well-served by the aftermarket. NATO straps, rubber dive straps, fabric straps (Tudor supplies one in many market configurations), and leather options are all available at 22 mm. The genuine Tudor rubber strap (also included in some configurations) fits the drilled lugs without adapters. Third-party options from Rubber B, Hirsch, and various NATO suppliers are widely available online. The push-button folding clasp on the steel bracelet also has a five-position micro-adjustment and a 5 mm diver extension.
The main risks are undisclosed service history, replaced parts, and — on M79230N watches — worn bezel inserts or stretched bracelets. Request documented service history where possible. Check the caseback for evidence of non-authorised opening (scratch patterns around the grooves). Verify the crown screws down firmly. On steel bracelets, check all links for excessive lateral play, which suggests stretching. Buying through a reputable pre-owned dealer with authentication and return policy (Chrono24, WatchBox, Crown & Caliber) reduces risk significantly versus private sale.
The Verdict
The Tudor Black Bay 41 is the sensible choice in a lineup full of compelling alternatives — which, paradoxically, makes it easy to overlook. The BB58 gets more press because it is more compact and more accessible. The Pelagos 39 gets more attention because it is technically more capable. But the BB41 occupies the exact centre of Tudor’s diver proposition: 41 mm of properly sized, properly specified steel dive watch at a price that is genuinely hard to argue against. Whether you choose the current M7941A generation from an AD or hunt down a M79230N in burgundy on the secondary market, you are getting one of the best in-house mechanical divers available under $5,500 new. Just measure your wrist first — below 6.5 inches, go BB58; above 7.5 inches, consider the original Black Bay 54. Everyone else: the BB41 is almost certainly your watch. Read the full Tudor Black Bay 41 review to see it up close, and browse the full Tudor catalogue to compare every current reference.
