Tudor Black Bay Fifty-Eight 925
- Case with satin finish (matt), 39 mm in diameter in 925 silver, with an incandescence and an open case back
- Domed dial, matt frosted taupe, with applied hour markers
- Manufacture Calibre MT5400, certified by the Swiss Official Chronometer Testing Institute (COSC) with a hairspring in silicon and a 70-hour power reserve
- “Snowflake” hands, one of the hallmarks of the TUDOR divers’ watches introduced in 1969, with grade A, Swiss Super-LumiNova® luminescent material
- A choice of two straps: taupe Jacquard fabric with silver band or brown grain leather
- Five-year transferable guarantee, without registration or mandatory maintenance checks.
Use of 925 silver
The use of 925 silver is a first for a TUDOR divers’ watch, and the composition of the chosen alloy is a secret that the brand keeps close to its chest. The properties of this alloy are such that use does not affect the appearance of the case of the Black Bay Fifty-Eight 925.
Entirely satin-finished for a matt effect, it possesses an unexpected incandescent brilliance, which can best be admired on the wrist. Its extraordinary texture lends a precious aura to this model, accentuated by its open case back, which enables an appreciation of its Manufacture MT5400 Calibre. These choices reinforce the dual aesthetic language of this model, midway between the legacy of a robust tool-watch that still defines TUDOR and a precious object.
Taupe and Silver
The silver case of the Black Bay Fifty-Eight 925 is also accentuated by its dial, which is taupe in colour, and its matching bezel insert. Numerous silver details add the finishing touches to this model’s delicate face, especially the famous “Snowflake” hands, one of TUDOR’s hallmarks since 1969, as do the graduations and text.
The same colour palette is found on the fabric strap offered with this model. The fabric strap is one of the hallmarks of TUDOR, which, in 2010, became one of the first watchmaking brands to offer it with its products. Woven in France on 19th century Jacquard looms by the Julien Faure company in the St-Etienne region, its manufacturing quality and comfort on the wrist are unique.
In 2020, TUDOR and Julien Faure, a 150-year old family company, celebrated10 years of a partnership that began with the Heritage Chrono – the first model to be fitted with a fabric strap created by the craftsman – that was launched at Baselworld 2010.
Manufacture Calibre MT5400
The Manufacture Calibre MT5400, which powers the Black Bay Fifty-Eight 925, displays hour, minute and second functions. It has the finish typical of TUDOR Manufacture Calibres. Its rotor in tungsten monobloc is openwork and satin-brushed with sand-blasted details, and its bridges and mainplate have alternate sand-blasted, polished surfaces and laser decorations.
Its build has been designed to ensure robustness, longevity, reliability and precision, as has a variable inertia balance, which is maintained by a sturdy traversing bridge with a two-point fixation. Together with its non-magnetic silicon hairspring, the Manufacture Calibre MT5400 is certified as a chronometer by the Swiss Official Chronometer Testing Institute (COSC), with its performance going beyond the standards set by this independent institute. In fact, where COSC allows an average variation in the daily running of a watch of between -4 and +6 seconds in relation to absolute time in a single movement, TUDOR insists on between -2 and +4 seconds’ variation in its running when it is completely assembled.
CASE: 39 mm case, satin finished, in 925 silver. Open case back with sapphire crystal
BEZEL: Unidirectional rotatable bezel in 925 silver with 60-minute graduated disc in matt taupe anodised aluminium and silver gilded markings and numerals
WINDING CROWN: 925 silver screw-down winding crown, with the TUDOR rose in relief with circular satin-brushed 925 silver winding crown tube
DIAL: Taupe, domed
CRYSTAL: Domed sapphire crystal
WATERPROOFNESS: Waterproof to 200 m (660 ft)
BRACELET: Brown grain leather strap or taupe fabric strap with silver band, with 925 silver buckle
MOVEMENT: Manufacture Calibre MT5400, Self-winding mechanical movement with bidirectional rotor system
PRECISION: Swiss chronometer officially certified by COSC (Swiss Official Chronometer Testing Institute)
POWER RESERVE: Approximately 70 hours
FUNCTIONS: Centre hour, minute and seconds hands, Stop-seconds for precise time setting
OSCILLATOR: Variable inertia balance, micro-adjustment by screw, Non-magnetic silicon balance spring, Frequency: 28 800 beats/hour (4 Hz)
TOTAL DIAMETER: 30.3 mm
THICKNESS: 5 mm
JEWELS: 27 jewels