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The TUDOR Black Bay 58 GMT pairs a 39 mm steel case with a jumping local-hour hand, a 24-hour GMT hand and a bidirectional 24-hour bezel. TUDOR specifies 200 m water resistance and a 65-hour power reserve for its COSC- and METAS-certified calibre MT5450-U. The US product page lists the steel-bracelet reference at $5,650 suggested retail, though TUDOR says prices may change.
What is the TUDOR Black Bay 58 GMT?
It is a steel automatic GMT watch in the Black Bay 58 line. TUDOR says the line’s name refers to 1958, when the company introduced its first divers’ watch rated to 200 metres, and describes the 39 mm diameter as reflecting proportions associated with watches of the 1950s. Those are the brand’s historical and design explanations, not independent assessments. TUDOR’s US product page identifies the steel-bracelet version as reference M7939G1A0NRU-0001.
Black Bay 58 GMT specifications
| Specification | Details |
|---|---|
| Case | 39 mm steel; 12.8 mm thick; 20 mm lug width (TUDOR product page) |
| Movement | Self-winding manufacture calibre MT5450-U with integrated GMT function (TUDOR product page and 2024 press kit) |
| Certification | COSC and METAS Master Chronometer (TUDOR 2024 press kit) |
| Power reserve | 65 hours, certified by METAS (TUDOR 2024 press kit) |
| Time and date functions | Jumping hour, 24-hour hand, date synchronized with the jumping hour, and stop-seconds (TUDOR 2024 press kit) |
| Water resistance | 200 m / 660 ft, as specified by TUDOR; this is the manufacturer’s rating, not an independent test (TUDOR product page and 2024 press kit) |
| Bezel and dial | Bidirectional 24-hour bezel with black-and-burgundy anodized aluminum insert; black domed dial with gilt applied markers (TUDOR product page and 2024 press kit) |
| Crystal and crown | Domed sapphire crystal and screw-down crown (TUDOR product page) |
| Bracelet configuration | Five-link steel bracelet with T-fit clasp on the cited US reference (TUDOR product page) |
| US suggested retail | $5,650 for the steel-bracelet reference on TUDOR’s US page accessed 2026-10-03; price may change (TUDOR product page) |
How does the Black Bay 58 GMT work?
The movement’s jumping hour allows the local hour to be adjusted in one-hour steps while the 24-hour hand retains reference time. The date is synchronized with the jumping hour, according to TUDOR. The bidirectional 24-hour bezel provides another time-zone reference when set against the GMT hand. TUDOR lists these functions for calibre MT5450-U; the specification alone does not establish independent practical-performance or accuracy testing.
How thick is the Black Bay 58 GMT?
TUDOR specifies a 39 mm case diameter and 12.8 mm thickness, with a 20 mm lug width. These measurements give a concrete sense of the case dimensions, but do not establish how it will fit a particular wrist.
The Tool Desk
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- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
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Steel bracelet or rubber strap?
TUDOR lists both steel-bracelet and rubber-strap configurations. The cited US page’s $5,650 suggested retail price applies to reference M7939G1A0NRU-0001 on the steel bracelet; the price of the rubber configuration is not stated on that page. Choose between the listed configurations by strap preference and the specific price shown for your market. The 20 mm lug width does not, by itself, verify compatibility with any particular third-party strap, end link or clasp.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is the Black Bay 58 GMT worth it?
The specification case is strongest for someone seeking a compact-diameter automatic GMT with a jumping local-hour function, substantial stated water resistance and independent movement certifications. Whether it represents good value depends on the buyer’s priorities and local price: the US listing is a suggested retail figure for the steel-bracelet reference, not a universal or fixed price. TUDOR’s 2024 Swiss launch press kit gave CHF 4,300 and CHF 4,100 including VAT for two configurations; those launch prices belong to the Swiss market and are not directly comparable with the current US listing.
Rank #2
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For the current US configuration and price, consult TUDOR’s Black Bay 58 GMT product page. TUDOR’s background on the Black Bay 58 name and design is available on its brand history page.
Quick Recap
Best Value
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Rank #4
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
