TUDOR
BLACK BAY GMT
THE SPIRIT OF A TRAVELLER’S WATCH
An extension of the Black Bay, the Black Bay GMT line sports an incredibly useful multiple time-zone complication, also known as a GMT function, which establishes local time without losing sight of the time in two other time zones. Recognisable by its 24-hour rotating bezel, which borrows its deep blue and burgundy colour scheme from other models in the Black Bay line, but in a matte version, the Black Bay GMT is also a nod to the early days of this high-flying aesthetic.
HIGH-FLYING FUNCTIONALITY
Additional time zones are indicated by a red “Snowflake” GMT hand, TUDOR's aesthetic hallmark, which rotates around the dial in 24 hours, as well as a bidirectional rotatable bezel that is also calibrated for 24 hours. The twelve daylight hours are printed on the burgundy section and the night-time hours on the blue.
With a steel case, 41mm in diameter, the Black Bay GMT model is waterproof to 200 metres (660 ft) and designed to withstand the elements. Its winding crown tube is in satin-brushed steel, new for the Black Bay line and aesthetically in keeping with the case and winding crown. Its contrasting opaline dial means that it is legible in all conditions, including night-time, thanks to its luminescent hour markers.
METAL BRACELET, BROWN LEATHER STRAP, OR FABRIC STRAP
The Black Bay GMT comes with a choice of a riveted steel or steel and gold bracelet, depending on the model, with polished and satin finish. It is also available with a “Terra di Siena” brown leather strap with folding clasp and safety catch, or a black fabric strap with a burgundy or beige band, complimenting the model’s bezel. Made using the Jacquard technique, a traditional method achieved by a hundred-year-old family business from the St-Etienne region of France, the fabric strap is one of TUDOR’s signature features.
MANUFACTURE CALIBRE MT5652
The Manufacture Calibre MT5652 with integrated GMT function, jumping hour hand and retrograde date setting was developed by TUDOR for the Black Bay GMT models. An apt demonstration of TUDOR's approach to technical development, the integration of new functions is allowed by a flexible architecture, rather than by stacking additional modules. A defining detail and a must for purist watch enthusiasts.
The Calibre MT5652 has the appearance and finish typical of TUDOR Manufacture calibres. Its openwork rotor is satin-brushed with sand-blasted details and its bridges and mainplate have alternate polished sand-blasted surfaces and laser decorations.
Its build is designed to ensure robustness and precision. To do this, the variable inertia balance wheel is maintained by a sturdy traversing bridge with a two-point anchoring. This system, together with its non-magnetic silicon hairspring, enables the Manufacture Calibre MT5652 to function within a tolerance range of 6 seconds (-2/+4) tested on a fully assembled watch.
BLACK BAY GMT
Opaline Dial
TUDOR has added the option of an all-new opaline dial that perfectly complements the iconic colour scheme of the Black Bay GMT. Not quite white but rather with a slightly silvery hue, the opaline dial is treated with a galvanic process in order to apply a matte white-grey while the marker surrounds are darkened to enhance the colour contrasts. The high legibility of the whimsical opaline dial is reminiscent of mid-century commercial aviation boom.
Key Features of the new GMT
- Satin-brushed case in 316L stainless steel, 41mm in diameter, with a bidirectional rotating bezel featuring an anodised aluminium insert in burgundy and deep blue, as a hallmark of the GMT function.
- Domed “opaline” dial with a galvanic finish.
- “Snowflake” hands, a hallmark of TUDOR divers’ watches introduced in 1969, with Grade A Swiss Super-LumiNova® luminescent material.
- Manufacture Calibre MT5652, COSC-certified with a silicon balance spring, 70-hour power reserve.
- Five-year transferable guarantee, with no registration or periodic maintenance checks required.
BLACK BAY GMT
Steel & Gold
The iconic Black Bay GMT model is also available in a S&G (Steel & Gold) version, featuring warm colours and a nostalgic touch. 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.
The Black Bay GMT S&G is available in steel and gold bracelet as well as with a “Terra di Siena” brown leather strap with folding clasp and safety catch.
The Black Bay GMT features a 41 mm satin-brushed steel case, waterproof to 200 metres (660 ft). Luminescent hour markers set against the black dial ensure legibility at night-time — and in all conditions. The dial features a GMT mention at 6 o’clock.
HOW TO: Set Up Your TUDOR Black Bay GMT
Date Window - Displays the current date.
Winding crown - The winding crown is used to set the time and date and to wind the watch if it has not been worn. The winding crown is screwed down onto the case to ensure water resistance. It must be fully tightened after each manipulation.
24-hour hand -This hand corresponds to the reference time. 24-hour hand moves around the dial once every 24 hours. According to the position of the bezel, this hand displays a second or a third time zone.
Seconds hand - The seconds hand can be adjusted via the winding crown or left unchanged when setting the time to different time zones.
Hour hand - This hand corresponds to local time. This hand moves around the dial once every 12 hours.
Minute hand - The minute hand can be adjusted via the winding crown or left unchanged when setting the time to different time zones.
Reference time - The reference time is your “home” or “main” time zone. During a journey, the reference time is indicated by the trianguler tipped 24 hour hand. Setting the reference time also moves the conventional hour hand (local time). For this reason, the reference time must be set before setting the local time.
Put the bezel in the neutral position (align the triangle on the bezel with the 12 o’clock marker on the dial).
2. Screw-down crown
Your TUDOR watch is equipped with a screw-down crown. Once this is fully screwed down against the case, your watch is guaranteed waterproof. With your finger unscrew the crown to position B. Your watch isn’t waterproof anymore.
3. Unscrewing the crown
To set the reference time, unscrew the crown and then pull it out to the second notch (position D). The seconds hand is stopped, allowing you to set the time to the precise second.
4. Turing the crown
Set the reference time using the 24-hour hand (against the graduations on the bezel) and the minute hand (against the graduations on the dial) by turning the crown in either direction. Rotate crown to set reference time to 15:36.
5. Setting the time
Push in and then screw down the crown. Your reference time is now set.
The time zone you are travelling to or currently in is considered local time. It is indicated by the conventional hour, minute and seconds hands.
2. Neutral position
Put the bezel in the neutral position (align the triangle on the bezel with the 12 o’clock marker on the dial).
3. Guaranteed waterproof
Your TUDOR watch is equipped with a screw-down crown. Once this is fully screwed down against the case, your watch is guaranteed waterproof. Unscrew the crown to position B. Your watch isn’t waterproof anymore.
4. Crown to position C
To set the date and the local time, pull the crown out to the first notch (position C). 5. Setting the date
Set the date by turning the crown in either direction. The hour hand moves in increments of one hour. The date changes when the hour hand passes midnight, in either direction, after two complete turns around the dial. Rotate crown to set the date to 29.
6. Turning the crown
Set the local time by turning the crown in either direction. The hour hand moves in increments of one hour. Be aware of the difference between noon and midnight (the date changes as the hour hand passes midnight).Rotate crown to set local time to 09:10.
7. Setting local time
Push in and then screw down the crown. Your local time is now set.
A third time zone can be displayed by using the rotatable bezel and the 24-hour hand. It is based on the reference time.
2. Reference time
Reference time is indicated by the 24-hour hand and the minute hand.
3. Local time
The local time is identical to the reference time (24-hour hand) if the wearer is currently located in his reference zone. It can be easily adjusted when travelling.
4. Reference time: Geneva
Imagine you are in Geneva, your reference time is set to 10:10 a.m.
5. Local time: New York
You are travelling from Geneva to New York. Local time in New York is 6 hours behind Geneva. The crown in position 2 allows adjusting the local time.
6. Additional time: Tokyo
Now you would like to know what time it is in Tokyo, which is 8 hours ahead of Geneva. Adjust to this time difference with the graduated 24-hour bezel. To display the third time zone, turn the bezel clockwise (for a negative time difference) or anticlockwise (for a positive time difference) according to the time difference between the reference time (24-hour hand) and the time in the desired time zone.
7. Third time zone
The 24-hour hand read against the bezel indicates the time in the third time zone. The minutes are shown on the dial by the minute hand.
