Black Bay Fifty-Eight
Ref. M79030N
- Case diameter
- 39 mm
- Manufacturer spec
- Lug-to-lug
- 47.8 mm
- Measured in a published review
- Thickness
- 11.9 mm
- Measured in a published review
- Lug width
- 20 mm
- Measured in a published review
How the Black Bay Fifty-Eight wears
Its lugs reach 8.8 mm past the 39 mm case, more than the 7 mm typical across the almanac, so it wears larger than its diameter suggests.
On our fit model it sits best on wrists from 6.75" to 8" (17.1–20.3 cm); below 6.75" the lugs start to reach the edge of the wrist.
At 11.9 mm thick it is slimmer than 84% of the 142 other dive watches we've measured, so it slides under a cuff more easily than most.
Its 20 mm lug width is one of the most common strap sizes; 186 other watches here share it, so aftermarket straps are easy to find.
Will the Black Bay Fifty-Eight fit your wrist?
With a 47.8 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.
| Wrist | Flat width (est.) | Fit |
|---|---|---|
| 6" | 47.2 mm | Lugs overhang |
| 6.5" | 51.2 mm | Snug, lugs near the edge |
| 7" | 55.1 mm | Ideal fit |
| 7.5" | 59.1 mm | Ideal fit |
| 8" | 63 mm | Ideal fit |
Specifications
- Reference
- M79030N
- Collection
- Black Bay 58
- Status
- Discontinued (2026)
- Introduced
- 2018
- Case material
- stainless steel
- Crystal
- sapphire
- Water resistance
- 200 m
- Bezel
- unidirectional rotatable 60-minute, steel with black anodised aluminium insert, gilt markings
- Dial
- black (gilt)
- Strap / bracelet
- riveted-style stainless steel bracelet or strap
- Style
- Dive
Movement
- Caliber
- Tudor MT5402
- Type
- automatic
- Power reserve
- 70 hours
- Frequency
- 28,800 vph (4 Hz)
- Jewels
- 27
- Accuracy
- COSC
2 other watches use the Tudor MT5402
Takes 20 mm straps. See other 20 mm watches and straps.
More Black Bay 58 references
Watches that wear the same size
Other watches within 1.5 mm of its lug-to-lug.
- BreitlingSuperocean Automatic 42A17375E71C1S1
- Case
- 42 mm
- Lug-to-lug
- 47.7 mm
- Thick
- 12.6 mm
- Nomos GlashütteTangente 38164
- Case
- 37.5 mm
- Lug-to-lug
- 47.7 mm
- Thick
- 6.8 mm
- RolexCosmograph Daytona126500LN
- Case
- 40 mm
- Lug-to-lug
- 47.8 mm
- Thick
- 11.9 mm
- RolexGMT-Master II16710
- Case
- 40 mm
- Lug-to-lug
- 47.7 mm
- Thick
- 12 mm
- SeikoProspex Sea TurtleSRPE93 · “Turtle”
- Case
- 45 mm
- Lug-to-lug
- 47.7 mm
- Thick
- 13.4 mm
- BenrusType 1 Mil SpecT1MS-SS-B-395-01
- Case
- 39.5 mm
- Lug-to-lug
- 47.7 mm
- Thick
- 14.4 mm
Same 20 mm lug width
All 20 mm watchesThese take the same straps as the Black Bay Fifty-Eight.
- AutodromoMonoposto Series Two (Moss Green)BP-002-MG
- Case
- 43 mm
- Lug-to-lug
- 46 mm
- Thick
- 11 mm
- BalticAquascaphe Classic
- Case
- 39 mm
- Lug-to-lug
- 47 mm
- Thick
- 13 mm
- BalticAquascaphe Dual-Crown Black
- Case
- 39 mm
- Lug-to-lug
- 47 mm
- Thick
- 11.9 mm
- BalticAquascaphe GMT MK II
- Case
- 39.5 mm
- Lug-to-lug
- 47 mm
- Thick
- 13.8 mm
- BalticAquascaphe MK2 37mm
- Case
- 37 mm
- Lug-to-lug
- 45 mm
- Thick
- 12.9 mm
- BalticAquascaphe MK2 39.5mm
- Case
- 39.5 mm
- Lug-to-lug
- 47 mm
- Thick
- 12.9 mm