TUDOR · Black Bay Ceramic
TUDOR Black Bay Ceramic M7941A1ACNU-0001: specifications and what to check
Case and bracelet both in matt black ceramic, on the same MT5602-U as the steel 41. Ceramic inverts every inspection habit built on steel: it will not scratch, and it cannot be refinished.
Reference M7941A1ACNU-0001 · specifications read from the manufacturer on 2026-09-22 · listed as current
Specifications
As published by TUDOR. A field the manufacturer does not state is left out rather than filled in.
- Case
- 41mm matt black ceramic case with micro-blasted finish
- Diameter
- 41 mm
- Thickness
- 13.6 mm
- Lug width
- 21 mm
- Water resistance
- Waterproof to 200m (660 ft)
- Crystal
- Domed sapphire crystal
- Bezel
- Unidirectional rotatable bezel in black-PVD-treated steel with 60-minute graduated disc in black ceramic, sunray satin finish, engraved markings and numerals
- Dial
- Charcoal, sunray finish, domed
- Crown
- Screw-down winding crown in black-PVD-treated steel with the TUDOR rose in relief and circular satin-brushed steel winding crown tube
- Bracelet
- Full ceramic bracelet in matching black
- Clasp
- Proprietary dual folding clasp design
Movement
- Calibre
- Manufacture Calibre MT5602-U
- Type
- Self-winding mechanical movement with bidirectional rotor system
- Power reserve
- 70-hour power reserve
- Certification
- COSC and METAS certified
What to check before you buy
- Inspect every ceramic edge and corner for chips rather than looking for scratches. Ceramic does not abrade, it fractures, and a chipped link or lug is not repairable — the part is replaced or it is not.
- Check the bracelet links individually. A full ceramic bracelet means many separate ceramic components, each of which can be chipped at the pin holes where stress concentrates.
- Compare the PVD-treated steel bezel and crown against the ceramic around them. PVD wears through at high points over time, and a worn edge next to unmarked ceramic is conspicuous.
- Confirm the proprietary dual folding clasp operates and locks. It is specific to this reference rather than shared with the steel models, so a damaged one is not a common spare.
- Ask directly whether the watch has been dropped. Ceramic tolerates a lifetime of desk diving and fails catastrophically on a hard floor, so history matters more here than surface condition suggests.
Same watch, opposite material rules
Underneath, this is the 41mm Black Bay: MT5602-U, 70 hours, 200 metres, 13.6mm deep, 21mm lugs. The steel reference shares all of it.
What changes is everything about how you assess a used one, because the case and bracelet are matt black ceramic with a micro-blasted finish rather than steel.
Stop looking for scratches
Every instinct a dealer builds on steel is wrong here.
Steel scratches and can be refinished. Ceramic essentially does not scratch — and when it does fail it chips, taking a small conchoidal flake out of an edge. That damage is permanent. There is no polishing it out, no blending it, no skilled refinish that hides it. The component is replaced or the watch stays damaged.
So the inspection is an edge inspection. Run your eye along every corner: the lug tips, the case flank, the ends of each bracelet link, and particularly the pin holes where stress concentrates when links are sized.
A full ceramic bracelet multiplies the risk
This is not a ceramic bezel insert on a steel watch. The entire bracelet is ceramic, in matching black, with a proprietary dual folding clasp.
That means dozens of individual ceramic parts, each independently chippable, each needing replacement rather than repair, on a clasp design specific to this reference rather than shared across the range. A damaged link is a harder problem to solve than on any steel bracelet TUDOR makes.
Count the links, look at each one, and price the watch as a set rather than as a case with an accessory attached.
Where the steel hides
Two components are black-PVD-treated steel rather than ceramic: the bezel ring and the winding crown, the latter with a satin-brushed steel tube.
PVD is a coating, and coatings wear at high points — the crown's knurling and the bezel's grip edge are where it goes first. On a watch whose ceramic surfaces will look untouched indefinitely, a worn PVD edge is unusually obvious, because nothing around it has aged at all.
The question worth asking
Ceramic survives ordinary wear better than steel ever will and survives a single sharp impact considerably worse. Surface condition therefore tells you much less about this watch's history than it would about a steel one.
Ask whether it has been dropped. On this reference that question matters more than how it looks.
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Sources
Not affiliated with TUDOR. Specifications are read from the manufacturer's own published documentation on the date shown and may change; the manufacturer's current documentation governs.