Genco Timepieces “Elegance in Every Second”
Tudor Black Bay 58 GMT
Reference 7939G1A0NRU – Full Set
The TUDOR Black Bay 58 GMT Ref. 7939G1A0NRU brings true travel functionality to the highly regarded Black Bay 58 collection, combining TUDOR’s unmistakable vintage-inspired design with a sophisticated modern GMT movement. With its compact 39mm stainless-steel case, distinctive black-and-burgundy 24-hour bezel, gilt accents, and Master Chronometer-certified Manufacture movement, this model delivers an exceptional balance of heritage styling, everyday versatility, and contemporary performance.
Case & Design
Crafted from stainless steel, the 39mm case features a combination of polished and satin-brushed finishes that highlight the strong proportions of the Black Bay design. At approximately 12.8mm thick, the case maintains the wearable dimensions for which the Black Bay 58 collection is known while incorporating a fully integrated GMT complication.
The case is fitted with a screw-down winding crown bearing the TUDOR rose in relief, while a domed sapphire crystal protects the dial. With 200 meters / 660 feet of water resistance, the Black Bay 58 GMT is engineered for everyday wear as well as more adventurous use.
Black & Burgundy GMT Bezel
One of the defining characteristics of this reference is its bidirectional rotating 24-hour bezel. The black and burgundy anodized aluminum insert provides a distinctive two-tone appearance while allowing the wearer to read an additional time zone in conjunction with the GMT hand.
The warm gilt-colored numerals and markings complement the dial beautifully, giving the watch a vintage character inspired by classic TUDOR sports watches while maintaining a distinctly modern presence.
Black Domed Dial
The black domed dial features TUDOR’s signature design language, including applied hour markers and the iconic angular “Snowflake” hands associated with TUDOR sports watches for decades.
Warm gilt-tone detailing provides contrast against the black dial, while luminous material on the hands and hour markers ensures excellent visibility in low-light conditions.
A dedicated GMT hand works with the 24-hour bezel to display an additional time zone, making the watch particularly useful for frequent travelers. The date display at 3 o’clock adds further everyday practicality without compromising the clean, balanced appearance of the dial.
Manufacture Calibre MT5450-U
Powering the Black Bay 58 GMT is TUDOR’s Manufacture Calibre MT5450-U, a self-winding mechanical GMT movement engineered for high levels of precision, reliability, and resistance to magnetic fields.
The movement is both COSC-certified and METAS Master Chronometer certified, placing the Black Bay 58 GMT among TUDOR’s most technically accomplished sports watches.
The integrated GMT mechanism allows the local hour hand to be adjusted independently, making changing time zones quick and convenient while traveling. The movement operates at approximately 28,800 vibrations per hour (4 Hz) and contains 34 jewels.
A silicon balance spring contributes to resistance against magnetic interference, while the approximately 65-hour power reserve allows the watch to be removed for more than two days without requiring immediate resetting.
GMT Functionality
The GMT complication enables the wearer to keep track of multiple time zones simultaneously. The central GMT hand completes one rotation every 24 hours and is read against the graduated bezel.
The independently adjustable local hour hand makes the system particularly convenient when crossing time zones. Rather than stopping the movement and resetting the entire watch, the local time can be advanced or moved backward while maintaining the reference time.
Water Resistance & Everyday Performance
Despite its refined appearance, the Black Bay 58 GMT remains a capable sports watch. Its 200-meter water-resistance rating, screw-down crown, sapphire crystal, robust stainless-steel construction, and highly engineered Manufacture movement make it suitable for both daily wear and travel.
The combination of a practical GMT complication, date display, strong water resistance, luminous dial, and extended power reserve makes this one of the most versatile models within the modern Black Bay family.
TUDOR Five-Year Guarantee
TUDOR watches sold since 2020 are covered by a five-year international guarantee, subject to the manufacturer’s applicable terms and conditions. The guarantee is transferable and does not require periodic maintenance checks or registration.
Key Specifications
- Brand: TUDOR
- Collection: Black Bay 58 GMT
- Reference: 7939G1A0NRU
- Case Material: Stainless Steel
- Case Diameter: 39mm
- Case Thickness: Approx. 12.8mm
- Lug Width: 20mm
- Dial: Black, Domed
- Hands: TUDOR “Snowflake” Style
- Bezel: Bidirectional 24-Hour GMT Bezel
- Bezel Insert: Black & Burgundy Anodized Aluminum
- Crystal: Domed Sapphire Crystal
- Movement: TUDOR Manufacture Calibre MT5450-U
- Movement Type: Automatic / Self-Winding Mechanical
- Certification: COSC & METAS Master Chronometer
- Jewels: 34
- Frequency: 28,800 vph / 4 Hz
- Power Reserve: Approximately 65 Hours
- Functions: Hours, Minutes, Seconds, Date & GMT / Second Time Zone
- Hairspring: Silicon
- Water Resistance: 200m / 660ft
- Crown: Screw-Down
- Bracelet: Rubber Straps
- Clasp: TUDOR “T-fit” Folding Clasp with Safety Catch
- Manufacturer Guarantee: Five Years, subject to TUDOR’s applicable warranty terms
The TUDOR Black Bay 58 GMT Ref. 7939G1A0NRU is an outstanding choice for collectors seeking the proportions and heritage-inspired appearance of the Black Bay 58 with the added practicality of a true GMT complication. Its black-and-burgundy bezel, gilt detailing, compact 39mm case and METAS-certified Manufacture movement give the watch a distinctive character while providing the precision, durability and functionality expected from a modern TUDOR sports watch.
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