Tudor Black Bay Watches Black Bay GMT

The Tudor Black Bay GMT is a 41 mm dual-time-zone sport watch built on Tudor's in-house MT5652 movement, offered in full stainless steel and two-tone steel-and-yellow-gold configurations with a vivid bidirectional 24-hour bezel that lets the wearer track a second time zone at a glance. The collection spans the iconic blue-and-red "Pepsi" bezel references alongside blacked-out bezel variants, and is available with a choice of black dial, opaline dial, fabric strap, leather strap, or riveted bracelet to suit virtually every wrist preference. References M79830RB and M79833MN represent the two core families within this line, with the S&G models pairing steel cases and crowns with yellow gold accents for a sportier take on two-tone luxury. Bizak and Co. carries authenticated Tudor Black Bay GMT watches across all major configurations, ready to ship.

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About the Tudor Black Bay GMT

Tudor introduced the Black Bay GMT as part of its broader Black Bay family, drawing on the brand's heritage of producing robust, legible dive and tool watches while adding genuine GMT complication utility for travelers and frequent flyers. The 41 mm case shares the Black Bay's signature snowflake hands, domed crystal, and cushion-influenced case shape, grounding it firmly in mid-century Tudor aesthetics. The "Pepsi" colorway, featuring a blue-and-red 24-hour graduated bezel insert, is arguably the most recognizable reference in the line and pays homage to classic GMT bezels that have captivated collectors for decades. The S&G designation denotes the steel-and-yellow-gold models, references M79833MN, which add warmth and versatility that crosses the line between sport and dress wear.

What to Look For

Buyers choosing between Black Bay GMT references should focus on three variables: bezel color, case material combination, and strap or bracelet configuration, since these drive both aesthetics and secondary-market value. The "Pepsi" blue-and-red bezel references on the M79830RB tend to command strong collector interest, while the S&G M79833MN models appeal to those seeking a step up in perceived luxury without moving to a full precious-metal case. Strap choice, whether riveted steel bracelet, fabric, or leather, affects wearability and price, and all options are officially supported by Tudor's interchangeable strap system.

Frequently Asked Questions

What is the case size of the Tudor Black Bay GMT?

Every Tudor Black Bay GMT in this collection measures 41 mm in diameter, making it a versatile size that sits comfortably on a wide range of wrist sizes. The 41 mm case is consistent across both the all-steel M79830RB and the steel-and-yellow-gold M79833MN families.

What is the difference between the Black Bay GMT and the Black Bay GMT S&G?

The standard Black Bay GMT references, M79830RB, are built entirely in stainless steel, while the S&G models, M79833MN, combine a stainless steel case and bracelet with yellow gold accents for a two-tone look. Both share the same 41 mm case, GMT complication, and dial options, so the choice comes down to personal preference for all-steel sporting style versus the warmer two-tone aesthetic.

What does the "Pepsi" bezel mean on the Tudor Black Bay GMT?

The "Pepsi" nickname refers to the bicolor blue-and-red 24-hour graduated bezel insert found on select Black Bay GMT references such as M79830RB-0010 and M79830RB-0001, colors that evoke the classic livery of iconic GMT watches. The 24-hour scale allows the wearer to distinguish AM from PM in the second time zone at a glance, with blue conventionally indicating night hours and red indicating daytime hours.

Browse also: GMT watches.

Buy, trade, or sell. Contact Bizak & Co. for pricing and availability on any reference in this collection.