Tudor Black Bay GMT Pepsi, ref. 79830RB, 2021 — view 1 of 6 — View 1 of 6 · Image: Vintage Watch Specialist · original image source (opens another website in a new tab)

View 1 of 6 · Image: Vintage Watch Specialist · original image source (opens another website in a new tab)

Wristwatches · Wristwatch

Tudor Black Bay GMT Pepsi, ref. 79830RB, 2021

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.

Maker / attribution: Tudor (maker)
Date: 2021
Historical period: Contemporary Horology (2010 – Present)
Country of origin: Switzerland
Object type: Wristwatch
Dimensions: Case 41 mm
Dealer: Vintage Watch Specialist (dealer), United Kingdom
Stock no.: vws3701cs
Credit line: Dealer listing, Vintage Watch Specialist (vws3701cs)
Catalogue title (original): Tudor Black Bay GMT Pepsi - Model Ref: 79830RB - Box and Papers - 2021 (English)

View the source record (dealer listing) ↗ (opens another website in a new tab)Suggest a correction

Record summary

Catalogued by Vintage Watch Specialist (dealer), United Kingdom (stock number vws3701cs), this is a wristwatch by Tudor, made in Switzerland, dated 2021. The Atlas places it in the Contemporary Horology period (2010 – Present) of its Wristwatches collection. Recorded dimensions: Case 41 mm. The record is illustrated with 6 photographs.

Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.

Catalogue description

Dealer description — Vintage Watch Specialist

A Superb Preowned 2021 Tudor Black Bay with a Pepsi Bezel, Model Ref: 79830RB, Sold with Box and Papers What's on Offer Celebrated for its robust design and practical functionality, this watch stands out with a striking red and blue "Pepsi" bezel—a nod to classic GMT styles. The 41mm stainless steel case ensures durability, while the vintage-inspired domed sapphire crystal adds a touch of elegance. The watch benefits from an original Tudor service and Tudor replacement dual-colour bezel in 'Pepsi' colours which gives the watch a real sporting aesthetic. At its heart lies the Caliber MT5652, a COSC-certified movement that offers superior accuracy and a power reserve of approximately 70 hours. This movement also supports the GMT function, allowing for dual-time zone tracking, a key feature for avid travellers. The black dial, furnished with the synonymous luminous "snowflake" hands and indices, enhances readability in low lighting and there is a subtle date wheel at 3 o'clock. This 2021 watch is sold paired with its original box and papers and is in superb preowned condition with barely any signs of previous wear. Any collection worth its salt should definitely boast a Tudor Black Bay GMT and this is a great buy!

Historical context

Contemporary Horology (2010 – Present)

Silicon components, connected watches, optical-lattice research clocks and a thriving independent scene.

Smartwatches became the world's best-selling watches, while mechanical watchmaking focuses on craft, innovation (silicon components, new escapements) and independent makers.

Read the period in the timeline More wristwatches from this period Earlier: Mechanical Renaissance

Atlas type guide

Military, pilot and travel watches

The wristwatch owes much of its adoption by men to warfare and aviation. Wristlets — small pocket watches soldered with lugs and worn on a strap — were used in colonial campaigns and became standard equipment in the First World War, with protective grilles over the crystal ('shrapnel guards'). Louis Cartier's Santos (1904), designed for the aviator Alberto Santos-Dumont, is often cited as an early purpose-made pilot's watch.

In the Second World War governments specified watches in detail: the German B-Uhr observation watches, the American A-11, and the British 'W.W.W.' (the 'Dirty Dozen' set of 1945). After the war, jet travel brought GMT and world-time watches, which show two or more time zones at once — Louis Cottier's world-time mechanism and the Rolex GMT-Master (1955) are examples.

What to look for

Military markings on the case back: broad arrow, issue numbers, 'W.W.W.', 'A.T.P.'
High-legibility black dials with luminous Arabic numerals; oversized crowns for gloved hands.
24-hour hands and rotating 24-hour bezels or city rings on GMT/world-time watches.
Wire lugs on early wristlets converted from pocket watches.

Dating clues

Wire-lug wristlets: c. 1900–1925.
Military specifications of the Second World War: 1939–1945.
GMT and world-time wristwatches: mainly after 1950.

General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.

Mechanisms mentioned

GMT / dual time — Complication
Power reserve indicator — Complication

Record completeness

Maker or attributionRecorded
DateRecorded
Place or countryRecorded
MaterialsNot in source
DimensionsRecorded
Narrative descriptionRecorded
Inscriptions / marksNot in source
ProvenanceNot in source
Several photographsRecorded

Editorial status: Documented — facts as published by the source; not independently verified by Atlas editors.

Explore further

Sources & image rights

Record source: Vintage Watch Specialist (dealer), United Kingdom (opens another website in a new tab).

Image rights: © Vintage Watch Specialist — dealer photographs; permission required (opens another website in a new tab).

Images are hosted by the Atlas for study and credited to their owner. Rights holders may request correction, credit changes or removal, or grant permission, via the editorial office.

Cite this record

"Tudor Black Bay GMT Pepsi, ref. 79830RB, 2021." Vintage Watch Specialist (dealer), United Kingdom, vws3701cs. Catalogue record in The Horology Atlas, WatchMuseum.org, https://atlas.watchmuseum.org/museum/tudor-black-bay-gmt-pepsi-ref-79830rb-2021-9cd4bc.