TUDOR BLACK BAY GMT S&G

The TUDOR Black Bay GMT model with integrated Manufacture Calibre MT5652 is now also available in an S&G (Steel & Gold) version.

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.

With the 24-hour graduated bidirectional rotating bezel and “24-hour” hand, this timepiece 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 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.

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. The power reserve of the Manufacture Calibre MT5652 is about 70 hours.

For the Black Bay GMT S&G Reference 79833MN, TUDOR has selected a black Jacquard fabric strap with a beige band woven by the 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.

The Black Bay line features dials inspired by the TUDOR divers’ watches produced during the 1950s. It borrows the characteristic angular hands known to collectors as “Snowflake” from models that appeared in the brand’s 1969 catalogue. Its unprotected crown and the characteristics of its case are reminiscent of the first generations of TUDOR divers’ watches.

Technical details

Model: TUDOR BLACK BAY GMT S&G
Reference 79833MN

Case
41 mm steel case with polished and satin finish
48-notch bidirectional rotating bezel in yellow gold with 24-minute graduated matt brown/black anodised aluminium disc
Yellow gold screw-down crown, with the TUDOR rose in relief, with circular satin-brushed steel winding crown tube
Domed sapphire crystal
Waterproof to 200 m (660 ft)

Movement
Manufacture Calibre MT5652 (COSC)
Self-winding mechanical movement with bidirectional rotor system
Integrated construction
Swiss Chronometer officially certified by the COSC (Swiss Official Chronometer Testing Institute)
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 of approximately 70 hours

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

Dial
Black, domed

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