Tudor Black Bay 58 7939A1A0NU

The Tudor Black Bay 58 Ref. 7939A1A0NU is the latest evolution of Tudor’s hugely successful 39mm vintage-inspired dive watch, refining the familiar Black Bay 58 formula with a slimmer case and significantly upgraded movement. The stainless steel case measures 39mm in diameter, 47.8mm lug-to-lug, and just 11.7mm thick, giving it the compact proportions that made the original Black Bay 58 so popular. This version features a domed matte black dial with applied luminous hour markers, Tudor’s signature Snowflake hands, and a matching black anodized aluminum unidirectional dive bezel. A domed sapphire crystal, screw-down crown, and 200 meters of water resistance maintain its genuine dive-watch credentials. Tudor offers the reference on a five-link bracelet, three-link “rivet-style” bracelet, or rubber strap, with all three configurations receiving the brand’s excellent T-fit rapid-adjustment clasp. tudorwatch
Inside is Tudor’s Manufacture Calibre MT5400-U, an automatic movement that represents a substantial technical step forward for the Black Bay 58. Operating at 28,800 vibrations per hour with 27 jewels, a variable-inertia balance, and a non-magnetic silicon hairspring, it provides a METAS-certified 65-hour power reserve. More importantly, the MT5400-U is both COSC-certified and METAS Master Chronometer certified, requiring the complete watch to meet stringent standards for precision, water resistance, power reserve, and resistance to magnetic fields of 15,000 gauss. tudorwatch The combination of the classic no-date Black Bay layout, refined 11.7mm-thick case, modern T-fit bracelet system, and Master Chronometer movement makes the 7939A1A0NU a more technically advanced interpretation of the Black Bay 58 while preserving the understated vintage Tudor dive-watch aesthetic that defined the collection.

Reference: 7939A1A0NU

Dated: 2026

Bracelet: Stainless Steel Oyster bracelet

Case: 39mm x 11.7mm Thickness - Stainless Steel

Lug Width: 20mm

Movement: Tudor MT5400-U - Automatic

Functions: Hours, Minutes, seconds

Box and Papers: Inner/outer, and warranty card

Crystal: Sapphire

Bracelet size: 8”

Case has no wear. Bracelet has no wear. Dial, hands, and crystal have no wear.

Tudor was established in 1926 by Hans Wilsdorf, the founder of Rolex, with a vision to create watches that offered the same reliability and precision as Rolex, but at a more accessible price point. Built with robust Swiss movements and housed in Rolex-quality cases, Tudor quickly earned a reputation for producing tool watches trusted by military units and professional divers around the world. In the 1950s and ‘60s, Tudor introduced iconic models like the Oyster Prince Submariner, worn by the French Navy, and carved out a legacy as a maker of rugged, no-nonsense timepieces built to perform under extreme conditions.

In recent years, Tudor has reemerged as one of the most exciting names in modern watchmaking. Collections like the Black Bay, Pelagos, and Ranger pay homage to the brand’s vintage roots while incorporating in-house calibers and contemporary design updates. The Black Bay Fifty-Eight, in particular, has become a collector favorite for its perfect blend of vintage proportions and modern engineering. With a design language all its own and a renewed focus on manufacturing independence, Tudor has established itself as far more than Rolex’s younger sibling—it’s a brand that balances heritage, innovation, and value with serious horological credibility.