Tudor Black Bay 58 7939A1A0NU: The Black and Gilt 39mm Master Chronometer
The Tudor Black Bay 58 7939A1A0NU is the black and gilt Black Bay 58 in stainless steel, presented in 2026 as the new generation of one of Tudor’s best-known dive watches. It keeps the compact 39mm case and vintage-inspired look that made the model a success, and adds a thinner case, refined details and a METAS certified Master Chronometer movement. The combination of a black dial, a black bezel and gold-toned accents gives the watch a warm, classic character.
The name Black Bay 58 refers to 1958, the year Tudor introduced its reference 7924, a dive watch known among collectors as the “Big Crown” because of its large winding crown. Tudor had presented its first Oyster Prince Submariner, reference 7922, a few years earlier in 1954. The Black Bay 58 translates this heritage into a contemporary watch with modest dimensions and a strong vintage feel. More background on the collection can be found on the official Tudor Black Bay 58 page.
The first Black Bay 58, reference 79030N, was launched in 2018 as a more compact alternative to the 41mm Black Bay. The 7939A1A0NU is its successor in black and gilt. Compared with the 79030N, the case is slightly thinner at 11.7mm, the crown has a smaller, more classic design with more pronounced notches, and the bezel edge has sharper knurling for a better grip. The dial text has been reduced from three lines to two, and the hands have been refined, with a lollipop seconds hand replacing the previous design.
Why the Tudor Black Bay 58 7939A1A0NU Remains a Compelling Choice
The 39mm stainless steel case is one of the main reasons for the popularity of the Black Bay 58. It combines polished and satin-finished surfaces, and with a thickness of 11.7mm it sits comfortably on a wide range of wrists, including smaller ones. The domed sapphire crystal adds to the vintage character while offering modern scratch resistance, and the case is waterproof to 200 metres, secured by a screw-down winding crown with a Tudor rose in relief.
The unidirectional rotating bezel features a black anodised aluminium insert with a gilded 60-minute scale, a red triangle and a luminous pearl at 12 o’clock. The matt black domed dial carries gold-toned applied hour markers and printing, and the hour hand has the characteristic snowflake shape that Tudor first used on its dive watches in 1969. Together, these details create a look that recalls the dive watches of the 1950s and 1960s, without feeling like a copy of a historical model.
Inside the 7939A1A0NU is the Tudor manufacture calibre MT5400-U, a self-winding mechanical movement with a bidirectional rotor and a silicon balance spring. It runs at 28,800 vibrations per hour and offers a power reserve of approximately 65 hours, which is enough to take the watch off for a weekend and still find it running. The movement is certified by both COSC and METAS as a Master Chronometer, which includes testing for precision and resistance to magnetic fields of up to 15,000 gauss.
The 7939A1A0NU is offered in three versions. Depending on the configuration, it comes on a five-link stainless steel bracelet, a three-link stainless steel bracelet with a riveted look or a black rubber strap. All versions are fitted with the Tudor T-fit clasp, which allows the length to be adjusted quickly without tools. The five-link bracelet gives the watch a slightly dressier feel, the three-link bracelet emphasises its tool watch roots and the rubber strap makes it ideal for summer and water sports.
The compact size of the Black Bay 58 makes it a particularly versatile dive watch. It is robust enough for daily wear and water activities, yet slim enough to slide under a shirt cuff. The black and gilt colour scheme is timeless and works equally well with casual clothing and a more formal outfit, which is why many enthusiasts see the Black Bay 58 as an ideal one-watch collection.
For collectors and enthusiasts, the new Black Bay 58 is a refined version of a modern classic. It keeps everything that made the original successful and improves on the details that owners valued most, such as thickness, legibility and adjustability of the bracelet. Buying pre-owned is a practical way to own this latest generation and wear it straight away. The model has lasting appeal thanks to its balanced proportions, its heritage-inspired design and its certified in-house movement.
Whether you are looking for your first luxury dive watch or a comfortable everyday watch with real heritage, the Tudor Black Bay 58 7939A1A0NU is a well-considered choice. It combines the charm of a vintage dive watch with modern construction and a Master Chronometer movement. Every pre-owned luxury watch from Langedyk Vintage Watches is supplied with an authenticity report. Explore our complete Tudor Black Bay collection to compare different models and versions.
