TUDOR
Ref. M7939A1A0NU-0003
Black Bay 58 39mm
Ref. M7939A1A0NU-0003
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Unveiled at Watches & Wonders 2026, the Black Bay 58 39mm marks a bold new chapter for TUDOR’s most celebrated collection. Long regarded as an enthusiast favourite, this latest iteration combines refined proportions, cutting-edge performance, and unmistakable vintage-inspired character.
As part of the updated Black Bay line, TUDOR has introduced a redesigned case profile measuring just 11.7mm thick, complemented by a refined bezel and crown for a sleeker, more streamlined silhouette on the wrist. The updated “lollipop” seconds hand pays homage to the brand’s historic diving watches, reinforcing the collection’s rich heritage.
Beneath the surface, the Black Bay 58 39mm is METAS Master Chronometer certified, meeting some of the industry’s highest standards for precision, magnetic resistance, waterproofness, and power reserve. A modern icon in the world of dive watches, the Black Bay 58 39mm is built to perform and designed to endure for generations.
This model features a sleek rubber strap, ensuring the ultimate comfort with a T-fit clasp, allowing you to make quick length adjustments on the fly. Moreover, the black colour perfectly complements both the dial and bezel, which allows the bronze and off-white shades to instantly pop.
| Brand | TUDOR |
|---|---|
| Product Reference | M7939A1A0NU-0003 |
| Product Type | Watch |
| Collection | Black Bay |
| Sub-collection | Black Bay 58 |
| Case Diameter | 39mm |
| Case Material | Stainless Steel |
| Dial Colour | Black |
| Crystal | Sapphire |
| Strap Type | Rubber |
| Clasp Type | T-Fit Clasp |
| Strap Material | Rubber |
| Movement | Manufacture Calibre MT5400-U (COSC and METAS certified) |
| Power Reserve | 65 Hours |
| Water Resistance | 200m / 660ft |
| Warranty | 5 Years |
| Michael Spiers ID | 007-4098 |
Delivery is made by Royal Mail Special Delivery and should reach you within 1-3 working days, excluding Bank Holidays and weekends.
Size Guide
Choosing the right ring size ensures maximum comfort and the perfect fit. If you already own a ring that fits well, you can easily use it as a reference. Otherwise, follow the simple options below to find your correct size.
If you do not know your ring size, we recommend visiting one of our showrooms, where our friendly and knowledgeable team can help you find the right ring size for you.
Request an AppointmentUK Ring Size Chart
| Size | UK Size |
|---|---|
| 01 | B |
| 02 | D |
| 03 | E-F |
| 04 | F |
| 05 | F-G |
| 06 | G |
| 07 | H |
| 08 | I |
| 09 | J |
| 10 | J-K |
| 11 | K-L |
| 12 | L |
| 13 | M-N |
| 14 | N-O |
| 15 | O-P |
| 16 | P |
| 17 | Q |
| 18 | Q-R |
| 19 | R |
| 20 | S |
| 21 | S-T |
| 22 | T-U |
| 23 | U-V |
| 24 | V |
| 25 | W |
| 26 | X |
| 27 | X-Y |
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