Tudor Black Bay Fifty-Eight 925

The name of the radiant Black Bay Fifty-Eight 925 model is, of course, a reference to the precious metal of its case, but also to 1958, the year in which the first TUDOR divers' watch waterproof to 200 metres (660 ft), reference 7924 or "Big Crown", was introduced. Among other aesthetic nods to this historic watch, this model offers a case 39 mm in diameter in keeping with the characteristic proportions of the 1950s. Ideal for slim wrists, vintage enthusiasts and those who like objects with a difference, the Black Bay Fifty-Eight 925 is also the first TUDOR divers' watch to be made in silver and to offer an open case back.

Highlights of the new models:

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.

A well-kept secret:

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.

Dial

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.

Hour, minute and seconds functions:

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