Tudor · Family: Black Bay
The Tudor Black Bay Fifty-Eight Navy Blue 79030B is the blue version of the 39mm Fifty-Eight line, in steel, with a unidirectional rotating bezel in blue anodized aluminum. It runs the in-house Caliber MT5402 with COSC chronometer certification and 70 hours of power reserve. Cazador has no verified price observations yet (n=0). Its standout detail: at just 4.99mm thick, Caliber MT5402 allows one of the slimmest cases and most faithful vintage dive-watch proportions in the entire Black Bay family.
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The Black Bay Fifty-Eight line launched in 2018, taking its name from 1958, the year Tudor released its first dive watch certified to 200 meters, reference 7924, the forerunner of the brand's entire diver lineage. The Fifty-Eight revived the compact proportions of those early models — a 39mm case versus the 41mm typical of the rest of the Black Bay family — at a moment when the market was starting to favor a return to more discreet case sizes.
In 2020, Tudor expanded the line with the Navy Blue version, reference 79030B, bringing to the Fifty-Eight a color palette — navy-blue bezel and details — already popular across other Black Bay references, on the same in-house Caliber MT5402 debuted with the original black Fifty-Eight (79030N).
The MT5402 is a smaller-diameter version of the Caliber MT5612 used in the standard Black Bay, but shares the same bidirectional tungsten monobloc rotor architecture and COSC chronometer certification. At 4.99mm thick, it lets the Fifty-Eight keep a notably lower case profile than its 41mm siblings.
This is the seventh Tudor reference Cazador adds, extending coverage of the Black Bay family to the blue Fifty-Eight variant.
Cazador has no verified price observations for this reference (n=0 as of today). We do not publish estimates without our own sourced market data.
From 1958, the year Tudor released its first dive watch certified to 200 meters, reference 7924, the forerunner of the brand's diver lineage.
Both share the case, Caliber MT5402, and proportions; the 79030B has a navy-blue bezel and details, while the 79030N has them in black.
70 hours, with COSC chronometer certification and a thickness of just 4.99mm.
200 meters, inherited from the 1958 reference 7924 that gave the line its name.
39mm, versus the 41mm typical of other Black Bay references — a deliberate difference to recapture the compact proportions of Tudor's late-1950s dive watches.