Status: Active Investigation
Condition: Very Good Pre-Owned
Scope: Box, Papers, and Cards
Year: 2025
The Tudor Black Bay GMT “Opaline” Ref. 79830RB is one of the most compelling modern variations in the Black Bay GMT line — taking the familiar burgundy-and-blue bezel format and pairing it with a bright opaline dial that gives the watch a noticeably sharper, more travel-ready character. The contrast between the dial and the classic “Pepsi” bezel makes this version feel more vivid and more contemporary than the standard black-dial GMT, while still preserving the core Black Bay identity. Tudor introduced the opaline-dial version in 2023, and the bracelet reference is M79830RB-0010.
What makes this reference especially appealing is that it keeps the Black Bay GMT formula intact while changing the entire feel of the watch. You still get the 41mm steel case, bidirectional 24-hour bezel, manufacture GMT movement, and robust daily-wear build, but the opaline dial adds a brighter, more collector-driven look that stands apart immediately on the wrist. It is a watch that feels equally suited to regular wear and enthusiast attention, which is a hard balance to strike well. Tudor lists the bracelet version with a 41mm steel case, domed opaline dial, MT5652 COSC movement, approximately 70 hours of power reserve, and 200 meters of water resistance.
This example dates to 2025 and is presented in very good pre-owned condition, showing only light wear consistent with normal careful use. The case and bracelet show only barely visible wear overall. It includes box, papers, and cards and is currently sized to fit approximately a 7.75-inch wrist. The only accessories call-out noted is no hang tag.
Reference: 79830RB / M79830RB-0010
Model: Tudor Black Bay GMT “Opaline”
Case: Stainless Steel
Case Size: 41 mm
Bezel: Bidirectional steel bezel with 24-hour graduated matte burgundy and blue anodized aluminum disc
Crystal: Domed Sapphire Crystal
Dial: Domed Opaline Dial
Movement: Tudor Manufacture Calibre MT5652 (COSC) Automatic
Bracelet: Riveted Stainless Steel Bracelet
Bracelet Fit: Approximately 7.75" wrist
Water Resistance: 200 m
Year: 2025
Accessories: Box, Papers, and Cards
Condition Notes: Very good pre-owned condition with only lightly visible wear consistent with normal use. Case and bracelet show barely visible wear overall. No hang tag.
The Black Bay GMT takes Tudor’s vintage-inspired dive-watch language and adapts it for travel use, combining the collection’s familiar snowflake-hand design and rotating bezel format with a true GMT architecture built around the in-house MT5652 movement. 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 a bit more distinctive without losing the rugged practicality that made the Black Bay GMT such a success in the first place.
The Black Bay GMT has already built a strong following within Tudor’s modern lineup, but the opaline dial has quickly 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 a little more differentiation, 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 solid bracelet fit. For someone looking for a modern Tudor GMT with strong everyday utility and more visual distinction than the standard black-dial version, this is a very attractive reference.
The Black Bay family has become one of the most recognizable pillars of Tudor’s modern identity, and the GMT line has broadened that appeal by bringing true travel-watch functionality into the collection. The opaline version, in particular, stands out as one of the more enthusiast-driven modern Tudor releases thanks to its contrast-heavy dial and immediate wrist presence.
“Recovered as a 2025 Tudor Black Bay GMT (Opaline) Ref. 79830RB. Box, papers, and cards. Very good pre-owned condition with barely visible wear to the case and bracelet. Sized to approximately a 7.75-inch wrist. No hang tag.”
Case #339 delivers one of the strongest modern Tudor GMT configurations in the lineup. With its opaline dial, classic burgundy-and-blue bezel, box, papers, and cards, and only light honest wear to note, this is a very attractive example of the Black Bay GMT “Opaline.”
👉 Every case deserves a closer look.