Tudor Black Bay GMT Pepsi Opaline 79830RB

The Tudor Black Bay GMT Ref. 79830RB “Pepsi” with Opaline Dial brings a brighter and more distinctive personality to Tudor’s full-size GMT platform. Introduced at Watches & Wonders in 2023, the model pairs a 41mm stainless steel case with a domed opaline dial created through a galvanic process, producing a matte white-grey finish with a subtle silvery character rather than a stark white appearance. Dark surrounds on the luminous Snowflake hands and hour markers provide strong contrast, while the red Snowflake GMT hand adds a bold splash of color. Surrounding the dial is Tudor’s bidirectional 24-hour bezel with a matte burgundy and deep-blue anodized aluminum insert—the combination commonly nicknamed “Pepsi.” A domed sapphire crystal, screw-down crown, date at 3 o’clock, and 200 meters of water resistance complete a watch that combines the vintage-inspired Black Bay aesthetic with the functionality of a modern travel watch.

Inside is Tudor’s Manufacture Calibre MT5652, a COSC-certified automatic movement developed specifically around an integrated GMT architecture. It operates at 28,800 vibrations per hour and offers approximately 70 hours of power reserve, along with a non-magnetic silicon balance spring and independently adjustable jumping local-hour hand. This “flyer” GMT functionality allows the wearer to move the local hour forward or backward without disturbing the minutes, seconds, or reference-time display, while the rotating 24-hour bezel makes it possible to track a third time zone as well. On the riveted stainless steel bracelet, the Opaline 79830RB combines Tudor’s historic Snowflake design language with one of the brand’s most practical modern complications, while its unusual light dial and classic Pepsi bezel make it one of the most visually distinctive versions of the original 41mm Black Bay GMT.

Reference: 79830RB

Dated: 2026

Bracelet: Stainless Steel Bracelet

Case: 41mm x 14.6mm thickness

Movement: MT5652 - Automatic

Functions: HMS, Date, Dual Time Zone

Box and Papers: Box and papers

Bracelet size: 7.5”

Case has little to no wear. Bracelet has minimal wear. Dial, hands, and crystal have no wear.

Tudor was established in 1926 by Hans Wilsdorf, the founder of Rolex, with a vision to create watches that offered the same reliability and precision as Rolex, but at a more accessible price point. Built with robust Swiss movements and housed in Rolex-quality cases, Tudor quickly earned a reputation for producing tool watches trusted by military units and professional divers around the world. In the 1950s and ‘60s, Tudor introduced iconic models like the Oyster Prince Submariner, worn by the French Navy, and carved out a legacy as a maker of rugged, no-nonsense timepieces built to perform under extreme conditions.

In recent years, Tudor has reemerged as one of the most exciting names in modern watchmaking. Collections like the Black Bay, Pelagos, and Ranger pay homage to the brand’s vintage roots while incorporating in-house calibers and contemporary design updates. The Black Bay Fifty-Eight, in particular, has become a collector favorite for its perfect blend of vintage proportions and modern engineering. With a design language all its own and a renewed focus on manufacturing independence, Tudor has established itself as far more than Rolex’s younger sibling—it’s a brand that balances heritage, innovation, and value with serious horological credibility.