Tudor - TUDOR  BLACK BAY GMT S&G 79833MN
Tudor - TUDOR  BLACK BAY GMT S&G 79833MN

TUDOR BLACK BAY GMT S&G 79833MN

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TUDOR BLACK BAY GMT S&G 79833MN

BLACK BAY GMT S&G

 
The iconic Black Bay GMT model with integrated Manufacture Calibre GMT is now also available in a S&G (Steel & Gold) version, featuring warm colours and a nostalgic touch.
 
Black Bay GMT S&G is a model with multiple time zones, a highly functional complication that establishes local time without losing sight of the time in two other time zones. Recognisable by its 24-hour graduated rotating bezel with two colours, representing day and night, the Black Bay GMT S&G also gives a subtle aesthetic nod to the history of this watchmaking function.
 
 

KEY POINTS

1. Satin-brushed and polished case in 316L stainless steel and yellow gold, 41 mm in diameter, with a bidirectional rotating bezel in yellow gold and insert in black and brown anodised aluminium as a hallmark of the GMT function
2. Domed grained matt black dial
3. “Snowflake” hands, a hallmark of TUDOR divers’ watches introduced in 1969, with Grade A Swiss Super-LumiNova® luminescent material
4. Manufacture Calibre MT5652, COSC-certified with a silicon balance spring, 70-hour power reserve
5. A choice of three bracelet designs: black Jacquard fabric, aged brown leather or riveted 316L steel and yellow gold
6. Five-year transferable guarantee with no requirement for registration or periodic maintenance checks
 

THREE TIME ZONES

On the Black Bay GMT S&G model, the reference time is indicated by an angular "Snowflake" hand, an aesthetic hallmark of TUDOR, which completes a lap of the dial every 24 hours.  Local time is indicated by another, shorter "Snowflake" hand set by a jumping hour, which can be moved either backwards or forwards.  The date, displayed through an aperture positioned at 3 o'clock, is connected to the local time hand so that when setting the time and passing midnight in retrograde, it instantly jumps to the previous day.  A very practical and technical detail for the user.  The 24-hour graduated bidirectional rotating bezel and "24-hour" hand mean you can also keep track of a third time zone.  On the anodised aluminium disc of the bezel, the graduations for the twelve daylight hours are gold-coloured on the brown section with the night-time hours on the black section.
 
 

THE MANUFACTURE CALIBRE MT5652

The Manufacture Calibre MT5652 with built-in GMT function was developed by TUDOR for the Black Bay GMT S&G model. It illustrates the technical development process which is unique to TUDOR, drawing on adaptable architecture capable of including new functions into its manufactured movements rather than resorting to additional modules. A minor detail for some, but a must for watchmaking purists.
It has been designed to ensure robustness, longevity, reliability and precision, as has its variable inertia balance, which is maintained by a sturdy traversing bridge with a two-point fixation. Together with its non-magnetic silicon balance spring, the Manufacture Calibre MT5652 is certified as a chronometer by the Official Swiss 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.
 
Another notable feature is that the power reserve of the Manufacture Calibre MT5652 is "weekend-proof", 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.
 
STEEL AND GOLD BRACELET OR JACQUARD-WOVEN OR LEATHER STRAP
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 using a traditional method 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 celebrated ten years of collaboration with the hundred-and-fifty-year-old Julien Faure company. The partnership began with the launch of Heritage Chrono, the first model fitted with a fabric strap created by the craftsmen, at Baselworld 2010.
 
For the Black Bay GMT S&G, TUDOR has selected a black strap with a beige band woven by these traditional craftsmen. The model is also available fitted with a stainless steel and yellow gold bracelet inspired by the folding riveted bracelets made by TUDOR in the 1950s and 1960s. These were famous for having visible rivet heads on the side of the bracelet that held the links together. The links also had a distinct stepped construction. These two aesthetic details are found on the current bracelet, which also integrates modern manufacturing methods with solid links and laser-finished rivet-style heads. Finally, the Black Bay GMT offers another choice of brown leather strap with light top-stitching and a folding clasp.

Technical specifications

REFERENCE 79833MN
 
CASE
41 mm steel case with polished and satin finish
 
BEZEL
48-notch bidirectional rotating bezel in yellow gold with 24-minute graduated matt brown/black anodised aluminium disc
 
WINDING CROWN
Yellow gold screw-down crown, with the TUDOR rose in relief, with circular satin-brushed steel winding crown tube
 
DIAL
Black, domed
 
CRYSTAL
Domed sapphire crystal
 
WATERPROOFNESS
Waterproof to 200 m (660 ft)
 
BRACELET
Riveted steel and yellow gold bracelet with polished and satin finish, or brown leather strap with steel folding clasp and safety catch, or black fabric strap with beige band and buckle
 
MOVEMENT
Manufacture Calibre MT5652 (COSC)
Self-winding mechanical movement with bidirectional rotor system
Integrated construction
 
PRECISION
Swiss Chronometer officially certified by the COSC (Swiss Official Chronometer Testing Institute)
 
FUNCTIONS
Jumping hours (second time zone), 24 hours, minutes and seconds at the centre
Instantaneous date at 3 o'clock without non-correction range synchronised on the jumping hours hand
Stop-seconds for precise time setting
 
OSCILLATOR
Variable inertia balance, micro-adjustment screw
Non-magnetic silicon balance spring
Frequency: 28,800 beats/hour (4 Hz)
 
TOTAL DIAMETER
31.8 mm
 
THICKNESS
7.52 mm
 
JEWELS
28 jewels
 
POWER RESERVE
Power reserve of approximately 70 hours

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