Tudor Black Bay Fifty-Eight 18K
1. Case with satin finish (matt), 39 mm in diameter, in 18 ct yellow gold with an open case back
2. Dial matt “golden green” in tone, with applied hour markers in 18 ct yellow gold
3. Manufacture Calibre MT5400, certified by the Swiss Official Chronometer Testing Institute (COSC) with a hairspring in silicon and a 70-hour power reserve
4. “Snowflake” hands, one of the hallmarks of the TUDOR divers’ watches introduced in 1969, in 18 ct yellow gold, with grade A Swiss Super-LumiNova® luminescent material
5. Two straps are included: green Jacquard fabric with gold band and dark brown alligator
6. Five-year transferable guarantee, without registration or mandatory maintenance checks
Satin-finished for a matt effect
Entirely satin-finished for a matt effect that may seem counter-intuitive with the traditional, bright finish typical of a gold watch, the case of the Black Bay Fifty-Eight 18K in 18 ct yellow gold is another first for a TUDOR divers’ watch. An open case back, which reveals the new Manufacture MT5400 Calibre, has not been offered by the brand before for this type of product and reinforces the dual aesthetic language of this model. Midway between the legacy of a robust tool-watch that still defines TUDOR and a precious object, the Black Bay Fifty-Eight 18K remains as rare as it is exclusive.
"Golden Green" Tones
The matt 18 ct yellow gold of the Black Bay Fifty-Eight 18K is emphasised by the elegant combination of dial and bezel, which are a rich “golden green” in tone with matt gold details. The “Snowflake” hands are in 18 ct yellow gold, as are the appliqués of the hour markers. 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, celebrated ten years of partnership that began with the Heritage Chrono – the first model to be equipped with a fabric strap created by the craftsmen – that was launched at Baselworld 2010.
robustness, longevity, reliability and precision
The Manufacture Calibre MT5400, which powers the Black Bay Fifty-Eight 18K, 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 -2 +4 seconds’ variation in its running when it is completely assembled.
Another notable feature is that the power reserve of the Manufacture MT5400 Calibre is “weekend-proof”; that is to say about 70 hours, which enables the wearer to take the watch off on a Friday evening and put it back on again on Monday morning without having to reset it.
Tudor Black Bay Fifty-Eight 18K
CASE: 39 mm case, satin finished, in 18 ct yellow gold, Open case back with sapphire crystal BEZEL: Unidirectional rotatable bezel in 18 ct yellow gold with 60-minute graduated disc in matt green anodised aluminium and gold gilded markings and numerals WINDING CROWN: 18 ct yellow gold screw-down winding crown, with the TUDOR rose in relief with circular satin-brushed 18 ct yellow gold winding crown tube DIAL: Green, domed CRYSTAL: Domed sapphire crystal WATERPROOFNESS: Waterproof to 200 m (660 ft) BRACELET: Domed dark brown alligator strap with 18 ct yellow gold buckle, Additional green fabric strap with gold-coloured band and 18 ct yellow gold buckle, included in the box
MOVEMENT: Manufacture Calibre MT5400, Self-winding mechanical movement with bidirectional rotor system PRECISION: Swiss Chronometer officially certified by the 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; REFERENCE 79018V