Tudor expands its flagship Black Bay Fifty-Eight this week with a new model sporting a navy blue dial and matte blue bezel.
The retro-styled 39mm Black Bay Fifty-Eight, which quickly became a Tudor best seller after it debuted in 2018, traces its lineage back to Tudor dive models from the early 1950s, with most of its features linked to the Tudor reference 7924 from 1958, known as the Big Crown edition.
Gone are the gilded touches to the markers, bezel and the hands we saw on the Black Bay Fifty-Eight from two years ago. Here Tudor replaces those accents with sportier steel on the dial and silver-colored markers and numerals on the bezel, perfectly matching the case and bracelet. 
Modern movement
As with the 2018 black-dialed edition, the new Black Bay Fifty-Eight Navy Blue inhabits its retro style while steeped in modern technology, most notably underneath its dial. There you’ll find an in-house Tudor Caliber MT5402, an automatic caliber with a non-magnetic silicon balance spring and an impressive seventy-hour power reserve.
Tudor notes that its caliber, tailor-made by Tudor for the 2018 Black Bay Fifty-Eight, performs with greater precision than its official COSC chronometer certification requires. Where COSC allows for an average variation in the daily running rate of a watch movement of between -4 and +6 seconds in relation to absolute time, Tudor says it applies a tolerance of between -2 and +4 seconds’ variation in its daily rate on the assembled watch.
While the front and even the sides of the new watch recall their origins in the 1950s and 1960s (notably regarding the Snowflake hands, seen first in 1969), the closed caseback gives away the game with engraved references to the manufacture caliber within.
Unscrewing the back, a watchmaker (or intrepid owner) would see a distinctly modern finish on the MT5402 caliber, notably a one-piece tungsten rotor that Tudor has open-worked, satin-brushed and sand-blasted. Tudor also alternates sand-blasted surfaces, polished surfaces and laser decorations on the movement’s bridges and mainplate.
Straps & bracelet
Those familiar with Tudor will know that its modern identity, and its success, is in part due to its unerring facility with fabric NATO-style straps, which the brand has embraced wholeheartedly since at least 2010.
Tudor continues that tradition with the new Black Bay Fifty-Eight Navy Blue, for which Tudor offers a handsome navy blue and silver-striped woven fabric strap (above) made in France by Julien Faure, a 150-year old family company. Tudor also offers a riveted steel bracelet (polished and satin finish) with folding clasp and safety catch and a blue “soft touch” strap with folding buckle and safety clasp.
The remaining Tudor-curious collectors who were not sold on the 2018 Black Bay Fifty-Eight’s slightly luxe black and gold accented dial and bezel back in 2018 have their watch with this new Black Bay Fifty-Eight Navy Blue. It’s sportier, beautifully blue-hued and supplies the same Tudor high-value mechanicals teamed with expert retro dress.
With the same pricing as the earlier model ($3,700 for the bracelet model and $3,375 for fabric strap), the watch serves up no visible obstacles to any motivated fan.
Specifications: Tudor Black Bay Fifty-Eight Navy Blue
(Ref. 79030B)
Movement: Automatic manufacture Caliber MT5402 with bidirectional rotor system, Swiss chronometer officially certified by COSC, 70-hour power reserve, variable inertia balance, micro-adjustment by screw, non-magnetic silicon balance spring; 28,800 bph (4 Hz) frequency.
Case: 39mm steel with polished and satin finish, unidirectional rotatable bezel in 316L steel with 60-minute graduated disc in matte blue anodized aluminum and silver gilded markings and numerals, steel screw-down winding crown with the Tudor rose in relief, with circular satin-brushed 316L steel winding crown tube, domed sapphire crystal, water resistant to 200 meters
Dial: Navy Blue, domed
Bracelet: Riveted 316L steel with polished and satin-brushed finish, or blue “soft touch” with folding clasp and safety catch, or blue fabric strap with silver band and buckle.
Prices: $3,700 (bracelet model) and $3,375 (either fabric strap)
All five watches share blue-shaded dials, including turquoise and dyed mother-of-pearl, and luminescent hands. 
In addition, as a dive model, the watch features the requisite unidirectional bezel and water-resistance to 300 meters.
