Model Reference
When the TUDOR Black Bay GMT 79833MN appeared in 2022, TUDOR already had a GMT in the Black Bay range. The steel 79830RB had been available since 2018, so there was little reason to simply reproduce the same watch in another colour. The 79833MN took a different route, using the established GMT format as the basis for TUDOR's Steel & Gold treatment.
The change gave the watch a very different presence. Burgundy and blue made way for a brown and black 24 hour bezel, while yellow gold details were introduced around the case and, depending on the configuration, through the bracelet. The black dial was also given warmer accents to suit the new combination of materials.
TUDOR did not restrict the 79833MN to one way of wearing it. The 2022 collection included a steel and yellow gold bracelet, brown leather and a black fabric strap with a beige band. For anyone looking at these watches second hand today, those original configurations help explain why two watches carrying the same main reference can look noticeably different.
Brown, black, steel and yellow gold are what give the 79833MN its identity. The bezel is divided into two colours around a 24 hour scale, making the distinction between the two halves of the day immediately visible. Its muted brown is particularly well suited to the warmer metal details and avoids making the watch look like a simple two tone version of the earlier Black Bay GMT.
TUDOR's use of gold is more complicated than it first appears. On the bracelet model, the first centre links at 6 and 12 o'clock are solid yellow gold. Other centre links use steel or steel covered with a 0.2mm yellow gold cap. The bezel and winding crown also incorporate steel components covered by a 0.3mm yellow gold cap. Understanding that construction is useful on a pre owned watch because these surfaces should not be described as though every gold coloured component were solid gold.
The black dial is kept relatively restrained. Large luminous markers surround the familiar Snowflake hour hand, while a separate GMT hand reaches towards the 24 hour scale. A date window occupies 3 o'clock. There is plenty happening mechanically, but the watch does not require multiple subdials or an additional scale printed around the dial to show it.
Its 41mm steel case retains the substantial proportions associated with the original Black Bay GMT. A domed sapphire crystal covers the dial, and the screw down construction supports a water resistance rating of 200 metres.
The real purpose of the 79833MN becomes clearer once the wearer crosses a time zone.
Imagine leaving London with the GMT hand set to UK time and arriving somewhere several hours ahead. Instead of resetting the whole watch, the conventional hour hand can be moved forwards in individual one hour jumps until it reaches local time. The GMT hand has not moved with it, so home time remains available whenever you look at the watch.
The date is tied to the local hour hand, which makes the system particularly useful when a journey crosses midnight. Move the local hand far enough forwards and the date advances. Travel in the opposite direction and the date can move backwards as the hour hand crosses midnight. Minutes and seconds do not need to be disturbed during the adjustment.
A third location can be brought into the calculation through the bidirectional bezel.
Turning its 24 hour scale changes the time being indicated by the GMT hand against the bezel. This gives the watch a practical way of dealing with three locations without adding another hand to an already busy display.
All of this is handled by the Manufacture Calibre MT5652. TUDOR designed the GMT function as part of the movement rather than attaching a separate module to a conventional calibre. The movement is COSC certified, uses a silicon balance spring and provides approximately 70 hours of power reserve.
That combination explains the appeal of the 79833MN better than describing it simply as a two tone Black Bay. The gold treatment changes its appearance, but underneath it remains a mechanical travel watch designed around quickly changing local time.
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The pre-owned TUDOR Black Bay GMT ref. 79833MN brings a more luxurious feel to TUDOR’s practical travel watch, combining a 41mm stainless steel case with yellow-gold detailing and a distinctive brown and black 24-hour bezel. Its GMT function allows you to keep track of a second time zone, while the COSC-certified Manufacture Calibre MT5652 provides approximately 70 hours of power reserve and 200 metres of water resistance.
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A pre-owned 79833MN deserves to be viewed with some knowledge of how TUDOR actually constructed it. The yellow gold capped components, solid gold first centre links and exposed steel surfaces should not all be assessed in exactly the same way. Previous polishing, scratches and bracelet wear can affect different areas differently.
That makes the individual watch more important than a generic description of reference 79833MN. BQ Watches can help you buy with a clearer understanding of what you are looking at, including whether the watch retains the correct configuration and how its condition compares with its age.
Owners may have a different question. Perhaps the watch has been worn for several years and you want to understand where it currently sits in the pre owned market. A valuation can consider the watch itself, its original configuration, condition, documentation and accompanying items.
BQ Watches also works with collectors whose tastes change over time. The 79833MN can form part of an exchange if you are moving towards another reference, while those ready to sell can have the watch considered individually rather than relying on a general figure attached to the model number.
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