Case #375 — Tudor Black Bay GMT “Pepsi Opaline” Ref. 79830RB

Case #375 — Tudor Black Bay GMT “Pepsi Opaline” Ref. 79830RB

Status: Active Investigation
Condition: Very Good Pre-Owned
Scope: Box, Papers, and Cards
Year: 2024

🔎 Case Notes

The Tudor Black Bay GMT “Pepsi Opaline” Ref. 79830RB is one of the most striking modern versions of the Black Bay GMT line. It keeps the familiar burgundy-and-blue bezel, 41mm case, and true GMT functionality of the standard model, but the opaline dial changes the entire feel of the watch. The contrast is sharper, the overall look is brighter, and the watch feels more distinctive on the wrist than the original black-dial version. The bracelet reference for this configuration is M79830RB-0010.

What makes this reference especially appealing is that it retains all the strengths of the Black Bay GMT platform while adding a dial execution that collectors notice immediately. The opaline surface gives the watch a slightly more contemporary and more expressive presence, but it still stays firmly within Tudor’s core design language. You still get the familiar case shape, snowflake hands, bidirectional 24-hour bezel, and manufacture GMT movement with approximately 70 hours of power reserve.

This example dates to 2024 and is presented in very good pre-owned condition. Overall, it shows light wear consistent with normal careful use, small ding on the bezel at 8PM. It includes box, papers, and cards and is currently sized to fit approximately a 7-inch wrist.

🕰️ The Evidence

Reference: 79830RB / M79830RB-0010
Model: Tudor Black Bay GMT “Pepsi Opaline”
Case: Stainless Steel
Case Size: 41 mm
Bezel: Bidirectional steel bezel with 24-hour graduated anodized aluminum disc in matte burgundy and blue
Crystal: Domed Sapphire Crystal
Dial: Domed Opaline Dial
Movement: Tudor Manufacture Calibre MT5652 (COSC) Automatic
Bracelet: Riveted Stainless Steel Bracelet
Bracelet Fit: Approximately 7" wrist
Water Resistance: 200 m
Year: 2024
Accessories: Box, Papers, and Cards

Condition Notes: Very good pre-owned condition overall, with light wear consistent with normal careful use.

🌍 GMT Heritage

The Black Bay GMT takes Tudor’s vintage-inspired dive-watch language and adapts it for travel use, combining the collection’s familiar snowflake hands, domed dial, and rotating bezel format with a true GMT movement built around the in-house MT5652. The result is a watch that still feels unmistakably like a Black Bay, but with the added practicality of tracking multiple time zones.

The opaline version gives that formula a different personality. Where the original black-dial GMT leans more traditional and tool-like, the opaline dial creates more contrast, more brightness, and a more immediately eye-catching presentation. It feels more distinctive without losing the rugged practicality that made the Black Bay GMT such a success in the first place.

🌟 Collector Provenance

The Black Bay GMT has already built a strong following within Tudor’s modern lineup, but the opaline dial has become one of the more desirable executions because it gives the reference a noticeably different look while keeping the same proven platform. For buyers who want the Black Bay GMT experience with a little more presence and more visual distinction, this is one of the easiest versions to gravitate toward.

Examples that include box, papers, and cards remain the strongest presentation for most buyers, and this one also benefits from a wearable, straightforward bracelet fit. For someone looking for a modern Tudor GMT with strong everyday utility and more visual character than the standard black-dial version, this is a very attractive reference.

🌟 Celebrity Provenance

David Beckham has been publicly photographed wearing Black Bay models, which underscores how visible the Black Bay family has become in Tudor’s modern identity.

🧾 From the Case File

“Recovered as a 2024 Tudor Black Bay GMT ‘Pepsi Opaline’ Ref. 79830RB. Box, papers, and cards. Very good pre-owned condition overall. Sized to approximately a 7.5 -inch wrist.”

🗝️ BST Verdict

Case #375 delivers one of the strongest modern Tudor GMT configurations in the lineup. With its opaline dial, classic burgundy-and-blue bezel, full set presentation, and only light honest wear to note, this is a very attractive example of the Black Bay GMT “Pepsi Opaline.”

👉 Every case deserves a closer look.