The Tudor Black Bay 41 M79540-0004 is a 41mm stainless steel watch with a blue dial, a fixed polished bezel, and Tudor’s signature snowflake hands. Unlike the dive-style Black Bay models, it skips the rotating bezel entirely. As a result, the case slims down to just 11mm thick, and the watch wears more like a refined everyday piece than a tool diver. Inside, an ETA-based automatic movement delivers a 38-hour power reserve, while the case stays water resistant to 150 meters. We spent time with this pre-owned example in our showroom, listed at a $3,322 wire price at the time of review. Here is how it holds up.
Quick Facts | Tudor Black Bay 41 M79540-0004
- Case: 41mm stainless steel, 11mm thick
- Bezel: Fixed, polished stainless steel
- Dial: Blue with applied indices and snowflake hands
- Movement: Automatic, 38-hour power reserve
- Crystal: Sapphire
- Water Resistance: 150 meters
- Bracelet: Stainless steel
- Condition: Pre-Owned, with box
- Price: $3,322 wire price at the time of review
First Impressions | The Quiet Black Bay
Most people picture a dive bezel when they hear “Black Bay.” This watch challenges that. The polished steel bezel frames the blue dial without interruption, and the whole face feels open and calm. Meanwhile, the snowflake hands and applied indices keep it unmistakably Tudor. The effect lands somewhere between a sports watch and a dress watch. In person, that versatility is the first thing you notice.
The Case | Slim, Balanced, Wearable
At 41mm across and just 11mm thick, the case is noticeably slimmer than its dive-watch siblings. Removing the rotating bezel did more than clean up the look. It cut real height off the wrist. The brushed top surfaces contrast nicely with polished case sides, and the oversized screw-down crown carries the Tudor rose in relief. In addition, the case is rated to 150 meters of water resistance. That is more than enough for swimming, even if this was never meant to be a diver.
The Dial | Blue Done Right
The blue dial is the reason to pick this reference. It shifts character with the light, reading deep navy indoors and brighter blue in the sun. Applied indices catch the light cleanly, while the snowflake handset adds just enough character to keep things interesting. There is no date window. Consequently, the dial stays perfectly symmetrical, which purists will appreciate.
Movement | Proven and Practical
Tudor built this generation of the Black Bay 41 around a reliable ETA-based automatic caliber. It beats at 28,800 vph and holds a power reserve of roughly 38 hours. That reserve means the watch will run through a weekend off the wrist, but not much longer. However, this is one of the most serviceable movements in Swiss watchmaking. Parts are plentiful, and any competent watchmaker knows it inside out. For long-term ownership, that matters. If you plan to rotate it with other pieces, our guide on whether it is bad to leave a watch unwound covers what to expect.
On the Wrist | Easy Company
This is where the Black Bay 41 makes its case. The slim profile slides under a shirt cuff without a fight. Meanwhile, the 41mm diameter gives it real presence on the wrist. The three-link steel bracelet is comfortable, secure, and balances the head of the watch well. If you are unsure whether 41mm suits you, our guide on how a watch should fit walks through the measurements that actually matter.
Which Black Bay 41 Is This? | M79540 vs. the Current Model
One important note for buyers. Tudor’s current catalog includes a dive-style Black Bay 41 with a rotating bezel and a METAS-certified in-house movement. The M79540 reviewed here is a different watch. It comes from the fixed-bezel generation introduced in 2017, built as a cleaner, slimmer take on the Black Bay design. Tudor has since updated this line, so the M79540 is now a pre-owned find rather than a retail purchase. For a look at where Tudor has taken the family since, our coverage of the Tudor Watches and Wonders 2026 releases breaks down the current lineup. And if you prefer the compact dive-watch formula, our Tudor Black Bay 58 guide covers the 39mm alternative in depth.
Our Takeaway | The Understated Everyday Tudor
The Black Bay 41 M79540-0004 is one of the most affordable ways into a modern Tudor. At $3,322 pre-owned, it costs meaningfully less than the brand’s dive models while sharing the same case quality and design language. This example comes with its box, though without papers. Fortunately, dating and verifying a Tudor is straightforward. Our Tudor serial numbers guide shows exactly how to do it. For first-time luxury buyers weighing their budget, our article on how much to spend on a first luxury watch puts this price point in context. In short, this is a smart, understated buy.
Are you thinking about adding this watch to your collection? Visit Precision Watches in Lower Gwynedd to try it on, or browse our full selection of pre-owned Tudor watches online.
Frequently Asked Questions About the Tudor Black Bay 41
Is the Tudor Black Bay 41 a dive watch?
Not this version. The M79540 has a fixed polished bezel and 150 meters of water resistance. It handles swimming easily, but it was designed as an everyday sports watch, not a diver.
What movement is inside the Black Bay 41 M79540?
It uses a proven ETA-based automatic caliber with a 38-hour power reserve. It is robust, accurate, and easy to service anywhere in the world.
Does the Tudor Black Bay 41 hold value?
Tudor watches hold value well for their price segment. Pre-owned examples of this reference trade well below original retail, which makes buying pre-owned the strong value move.
Is 41mm too big for smaller wrists?
Usually not with this watch. The slim 11mm case and downturned lugs help it wear comfortably on a wide range of wrists. Trying it on in person is the best way to know for sure.
Does the Tudor Black Bay 41 hold value?
Tudor watches generally hold value well for their price segment. Pre-owned examples of this reference trade below original retail, which can make buying pre-owned an appealing option for value-minded buyers.
