Tudor Black Bay GMT “Pepsi” | 41mm Black Dial | Ref. 79830RB

The Tudor Black Bay GMT Ref. 79830RB pairs the Black Bay collection’s vintage-inspired design with a practical GMT complication in a 41mm stainless-steel case. Its domed black dial features luminous Snowflake hands, applied hour markers, a red 24-hour GMT hand, a date window at 3 o’clock, and a domed sapphire crystal. The burgundy-and-blue 24-hour bezel, fitted with a 48-notch bidirectional stainless-steel bezel and matte anodized aluminum insert, gives the watch its popular “Pepsi” nickname and allows the wearer to track an additional time zone.

Powering the watch is Tudor’s Manufacture Calibre MT5652, an automatic GMT movement with an independently adjustable local-hour hand, 28 jewels, a 28,800 vph frequency, a silicon balance spring, COSC certification, and approximately 70 hours of power reserve. The screw-down crown and originally rated 200-meter water resistance provide genuine sports-watch capability, while the included Tudor card adds to the watch’s completeness and provenance.

Condition

Please review the photos carefully for an accurate representation. Light scratches, bracelet or strap wear, bezel wear, crystal wear, or other signs of use consistent with age may be present and do not affect functionality. The watch presents well overall with expected wear for its age.

Technical Data

• Reference: 79830RB

• Model: Tudor Black Bay GMT

• Nickname: “Pepsi” – Collector/Market Nickname

• Case Diameter: 41mm

• Case Thickness: Approximately 14.6mm

• Lug Width: 22mm

• Case Material: Stainless Steel

• Bezel: 48-Notch Bidirectional Rotating Stainless-Steel Bezel

• Bezel Insert: Matte Burgundy & Blue Anodized Aluminum, 24-Hour Scale

• Dial: Domed Black Dial

• Hands: Luminous Tudor Snowflake Hands with GMT Hand

• Crystal: Domed Sapphire Crystal

• Date: Instantaneous Date Window at 3 O’Clock

• Crown: Screw-Down Stainless-Steel Crown

• Movement: Tudor Manufacture Calibre MT5652

• Movement Type: Automatic / Self-Winding GMT

• Jewels: 28

• Frequency: 28,800 vph / 4 Hz

• Balance Spring: Non-Magnetic Silicon

• Power Reserve: Approximately 70 Hours

• GMT Function: Independently Adjustable Jumping Local Hour Hand

• Certification: COSC-Certified Chronometer

• Water Resistance: Originally rated to 200 meters / 660 feet; current water resistance not guaranteed

• Functions: Hours, Minutes, Center Seconds, Date, GMT / Second Time Zone, 24-Hour Display & Stop-Seconds

• Included: Tudor Card