TUDOR Heritage Black Bay Dark Watch M79230DK

£1,995.00

In stock

Box: Yes | Papers: Yes | Year: 2020
Specifications

  • REFERENCE: 79230DK-0007
  • CONDITION: Good condition with original box and papers
  • GUARANTEE: Feb 2020
  • MATERIAL: Black PVD & stainless steel
  • DIAL: Black
  • BRACELET: Aged black leather strap and additional canvas strap
  • DIAMETER: 41mm
  • BEZEL: Uni-directional with black ceramic disc
  • CROWN: Screw-down
  • CRYSTAL: Domed sapphire
  • WATER RESISTANCE: Waterproof to 200m
  • MOVEMENT: Calibre MT5602
  • ACCURACY: -4/+6 sec/day
  • POWER RESERVE: Approximately 70 hours
  • CLASP: Black PVD-treated steel folding clasp and safety catch

The TUDOR Heritage Black Bay Dark represents a bold, tactical interpretation of the brand’s iconic diving watch heritage. This distinctive timepiece combines sixty years of diving watch expertise with modern materials technology, featuring a black PVD coating derived from thin film technology originally developed by NASA for aerospace applications.

Featuring a 41mm steel case with comprehensive black PVD treatment and the in-house Calibre MT5602 movement, this Black Bay variant offers serious diving capabilities wrapped in stealthy aesthetics. The characteristic “Snowflake” hands, a design element borrowed from watches delivered to the French National Navy in the 1970s, ensure exceptional legibility alongside the domed dial and crystal inherited from TUDOR’s first generation diving watches.

Condition: Good pre-owned condition
Includes: Complete box set with papers and additional canvas strap
Warranty: Originally dated 2020
Shipping: Free UK delivery

TUDOR Heritage Black Bay Dark Key Features

Tactical Design Elements

  • 41mm stainless steel case with black PVD coating
  • NASA-derived thin film coating technology
  • Unidirectional rotating bezel with 60-minute graduation
  • Matt black dial with luminescent hour markers
  • Iconic “Snowflake” hands with luminous fill
  • Domed sapphire crystal
  • Reference: M79230DK

In-House Movement Excellence

  • Manufacture Calibre MT5602
  • COSC chronometer certification (-4/+6 seconds per day)
  • 70-hour power reserve
  • Silicon balance spring for magnetic resistance
  • Variable inertia balance wheel
  • Transversal bridge for shock resistance
  • Developed specifically for Black Bay models

Professional Diving Capability

  • 200-metre water resistance
  • Screw-down crown with TUDOR rose
  • Unidirectional bezel for dive timing
  • Superior luminescence for underwater visibility
  • Robust construction meeting professional standards
  • Heritage from French Navy diving watches
  • Tool watch functionality with luxury finishing

Superior Construction Details

  • Case diameter: 41 mm
  • Black aged leather strap
  • Black PVD-treated steel folding clasp
  • Comprehensive PVD treatment on all metal components
  • Domed dial and crystal design
  • Exhibition caseback showing decorated movement
  • Water-resistant to 200 metres

The Black Bay Legacy and Context

The Black Bay celebrates 60 years of TUDOR diving watches with extraordinary heritage, drawing design elements from the brand’s most significant historical models. The domed dial and crystal pay homage to the first generation of TUDOR diving watches from the 1950s, while the angular “Snowflake” hands were borrowed from references delivered in large quantities to the French National Navy in the 1970s, creating a design that bridges multiple eras of diving watch excellence.

The Dark variant takes this heritage in a contemporary direction through its comprehensive PVD treatment using technology originally developed by NASA. This isn’t merely aesthetic—the coating provides genuine functional benefits including enhanced durability and reduced reflectivity crucial for tactical applications. Combined with the in-house MT5602 movement offering COSC-certified precision and modern technical refinements, the Black Bay Dark represents TUDOR’s ability to honour tradition while embracing innovation.

Perfect For

  • Professional divers
  • TUDOR collectors
  • Military watch enthusiasts
  • Black watch specialists
  • Tool watch admirers
  • Heritage design appreciators
  • Tactical timepiece seekers
  • In-house movement advocates

Frequently Asked Questions

What Makes the PVD Coating Special?

The black PVD (Physical Vapour Deposition) coating on the Black Bay Dark utilises thin film technology originally developed by NASA for aerospace applications. This process deposits microscopic layers of titanium-based compounds onto the steel surface in a vacuum chamber, creating a coating harder than the underlying steel. The result is exceptional scratch resistance and durability that far exceeds traditional black coatings like paint or anodising.

Beyond durability, the PVD treatment provides practical benefits for professional use. The matt black finish eliminates reflections that could compromise tactical operations, while the coating’s chemical inertness ensures it won’t react with saltwater or chemicals. Unlike some PVD coatings that can wear unevenly, TUDOR’s comprehensive treatment covers all visible metal components, ensuring consistent appearance even with heavy use.

How Does the MT5602 Movement Improve on Previous Calibres?

The in-house MT5602 represents a significant advancement from the ETA movements previously used in Black Bay models. The 70-hour power reserve, nearly double the 38 hours of earlier movements, means the watch can sit unworn over a weekend and still be running Monday morning. The COSC chronometer certification guarantees precision between -4/+6 seconds daily, ensuring professional-grade accuracy.

Technical refinements include a silicon balance spring providing immunity to magnetic fields increasingly present in daily life, a variable inertia balance wheel improving long-term precision, and a transversal bridge over the balance wheel enhancing shock resistance. These improvements aren’t just specifications, they translate to real-world reliability, making the Black Bay Dark more resistant to the magnetic fields from phones and laptops while maintaining accuracy through active use.

What Is the Significance of the Snowflake Hands?

The distinctive angular “Snowflake” hands first appeared on TUDOR diving watches delivered to the French National Navy in the 1970s. These hands were developed specifically to maximise underwater legibility, with their unique square shape providing more surface area for luminous material than traditional Mercedes or sword hands. The design proved so effective it became TUDOR’s signature, instantly distinguishing their diving watches from competitors.

On the Black Bay Dark, these hands maintain their functional superiority while adding visual character. The generous luminous fill ensures visibility in murky water or low light, while the angular geometry creates a technical aesthetic that complements the watch’s tactical appearance. This design element connects the modern Black Bay to decades of professional diving use, proving that form following function can create enduring style.

How Does the Black Bay Dark Differ From Standard Black Bay Models?

The Dark variant distinguishes itself through comprehensive black PVD treatment covering the case, bezel, and crown, creating a monochromatic aesthetic absent from standard steel models. This isn’t simply a colour variation, the PVD coating adds functional benefits including enhanced scratch resistance and reduced reflectivity. The black aged leather strap with matching PVD buckle maintains the all-black theme while offering a more refined alternative to the fabric straps common on other Black Bay models.

While maintaining the same exceptional MT5602 movement and 200-metre water resistance as other Black Bay variants, the Dark edition appeals to those seeking a more tactical or discrete appearance. The NASA-derived coating technology adds a technical story that enhances the watch’s tool-watch credentials, making it particularly appealing to military watch enthusiasts and those who appreciate the intersection of aerospace technology and traditional watchmaking.

Is the Black Bay Dark Suitable for Daily Wear?

Despite its tactical appearance, the Black Bay Dark excels as a daily wearer through thoughtful design and robust construction. The 41mm case provides substantial presence without being oversized, while the curved lugs ensure comfortable fit on various wrist sizes. The 70-hour power reserve means occasional wear won’t require constant resetting, and the COSC-certified accuracy ensures reliable timekeeping for professional use.

The PVD coating’s durability makes it particularly suited to daily wear, resisting the scratches and scuffs that would mark a polished steel watch. The aged leather strap develops character with wear while remaining appropriate for both casual and business settings. Combined with 200-metre water resistance and magnetic resistance from the silicon balance spring, the Black Bay Dark handles everything from desk work to weekend adventures without compromise.

For any purchases online, we offer a 14 day refund as long as they are returned exactly as sold. Any purchases in person are final.

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