Tudor
Black Bay Fifty Eight Navy Blue Stainless Steel - Full-Set

Tudor Black Bay Fifty-Eight “Navy Blue” reference 79030B, 2020 Full Set watch from the first production year of this blue version, approximately 11.9 mm-thick 39 mm satin-finished and polished 316L stainless-steel case, unidirectional rotating steel bezel with matt navy-blue anodised aluminium insert and silver 60-minute graduation, domed grained navy-blue dial, applied luminous hour markers and Snowflake hands, no-date three-hand display, domed sapphire crystal, screw-down steel crown embossed with the Tudor rose, screw-down caseback, 200-metre water resistance, original riveted Tudor stainless-steel bracelet with secure folding clasp, manufacture Tudor calibre MT5402 COSC-certified self-winding mechanical movement operating at 28,800 vibrations per hour, silicon hairspring, 27-jewel construction, approximately 70-hour power reserve after full winding, pre-owned watch sold with its original box, papers and accessories, inspected, authenticated and covered by Mostra’s 3-year warranty.

“Some blue watches immediately evoke the sea. The finest also preserve its depth, changing light and that feeling of freedom that appears as the coast slowly begins to disappear behind us.”

The Tudor Black Bay Fifty-Eight Navy Blue 79030B belongs to that rare family of contemporary watches that feel as though they have always existed. Its design does not artificially recreate an old diver, but recovers the proportions, legibility and simplicity that made professional watches of the 1950s so natural on the wrist. With its 39 mm case, domed crystal, aluminium bezel and no-date display, it returns to the essential without sacrificing the performance of a modern watch. Produced in 2020, the launch year of the Navy Blue version, this example belongs to the first generation of a model that immediately became one of the most desirable Tudor watches of its period.

The name Fifty-Eight refers to 1958 and the Tudor reference 7924 “Big Crown”, the Maison’s first dive watch rated to 200 metres. The modern Fifty-Eight recovers the measured proportions of those historical Tudor Submariners through a case that is narrower and thinner than the original contemporary Black Bay. It never feels reduced; it simply feels correctly proportioned. The lugs follow the wrist, the crown remains easy to operate and the steel bracelet extends the case without visually weighing it down.

The navy-blue colour gives the reference its identity. Tudor selected neither a bright nor metallic blue, but a dense and slightly cool matte tone that changes with the light. The dial may appear almost black indoors before revealing a deeper maritime character in direct light. Its anodised bezel uses a related yet subtly different shade, much like the surface of the sea never exactly matches the water below.

This colour belongs to a genuine Tudor tradition. From 1969, the Maison introduced blue dials and bezels within its diving collection, a language later associated with Tudor watches used by the French Navy during the 1970s. The Black Bay Fifty-Eight Navy Blue is not an issued military watch, but it continues a colour code inseparable from Tudor’s professional diving history.

The Snowflake hands provide immediate distinction between hours and minutes, while their broad luminous surfaces preserve legibility as light fades. Applied markers follow the same functional logic and give the dial genuine depth. The absence of a date maintains symmetry and makes the watch simple to reset after a period of rest.

Inside is the manufacture Tudor calibre MT5402, designed around robustness, precision and autonomy. It operates at 28,800 vibrations per hour, contains 27 jewels and uses a silicon hairspring. Its variable-inertia balance is supported by a full bridge secured at two points, improving stability under shock and vibration. COSC chronometer certification confirms its performance, while its approximately 70-hour power reserve allows the watch to be removed on Friday evening and worn again on Monday morning without resetting.

The riveted Tudor steel bracelet continues the dialogue between historical inspiration and contemporary construction. Visible side rivets recall vintage Tudor Submariner bracelets, while solid links and a secure folding clasp provide modern strength and comfort. On steel, the Navy Blue moves naturally from sea to city and works equally well with casual clothing or a shirt.

From a collector’s perspective, this 2020 Full Set Tudor Black Bay Fifty-Eight Navy Blue combines several important qualities. It belongs to the first production year of the blue version, retains the most recognisable configuration of the model and is accompanied by its original box, papers and accessories. Reference 79030B also marks an important moment in modern Tudor history, demonstrating that a contemporary diver could offer manufacture mechanics, substantial autonomy and genuine water resistance while returning to the dimensions collectors valued in historical watches.

Choosing this Tudor Black Bay Fifty-Eight from Mostra means benefiting from more than forty years of experience in collectible watches, a highly regarded in-house watchmaking workshop in Aix-en-Provence and one of the largest selections of high-end pre-owned watches in the South of France. Before sale, the dial, hands, bezel, case, bracelet, accessories, calibre MT5402, rate, amplitude, winding, power reserve, crown, clasp and water resistance are carefully examined.

Mostra’s verified customer reviews carry a 5-star rating, reflecting an approach founded upon transparent descriptions, informed advice and long-term support. This Tudor is supplied with its complete 2020 Full Set, a Mostra Certificate of Authenticity and the Mostra 3-year warranty, giving its future owner direct access to an identified specialist and a workshop capable of supporting the watch over time.

A Tudor Black Bay Fifty-Eight Navy Blue 79030B is ultimately chosen for more than its blue dial or vintage appearance. It is chosen for the way it brings together two periods: the proportions and visual language of historical Tudor professional watches with the precision, autonomy and reassurance of a modern manufacture diver.