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Tudor Black Bay Pro 39mm Stainless Steel
Ref. 79470
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Stepping up in the same colour and case shape
The Black Bay Pro exists to answer a specific question: what does a GMT look like when Tudor builds it around the Black Bay's tool-watch character rather than around the conventions of the travel-watch category. The fixed bezel carries 24-hour markings rather than a rotating scale, making it a reference for the second time zone rather than a tracking instrument — a deliberate choice that keeps the case uncluttered and the silhouette closer to a field watch than a pilot's piece. At 39mm with a 47.2mm lug-to-lug span, it sits compactly on the wrist, though 14.6mm of height means it wears with real substance rather than disappearing beneath a cuff. The GMT function is delivered through the MT5652 without a modular addition — the complication is built directly into the movement's architecture, which keeps the crown interaction clean and the local hour able to jump independently. COSC certification comes standard, and the silicon hairspring shrugs off the magnetic fields that catch most movements off guard. The ceramic monobloc indices are worth noticing in the second week. Rather than metal frames filled with lume, each marker is formed entirely from luminous material, which maximises the surface exposed to charge and produces a glow that is noticeably brighter and more sustained than the category average. The T-fit clasp adjustment — five positions across 8mm, no tool required — is the kind of detail that seems minor until a long flight changes your wrist size.
- Reference
- 79470
- Brand
- Tudor
- Collection
- Black Bay
- Case size
- 39mm
- Case thickness
- 14.6mm
- Lug width
- 20mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- MT5652
- Functions
- GMT, Date
- Water resistance
- 200m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Condition
- Pre-owned
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 47.2mm
- Power reserve
- 70 hours
Learn more about Tudor
Tudor exists because Hans Wilsdorf wanted to sell a Rolex to people who could not afford one. He registered the name in 1926 and relaunched it properly in 1946 as a separate company: Rolex cases, Rolex bracelets, Rolex crowns, but bought-in movements — usually ETA — at a fraction of the price.
For decades this made Tudor the practical choice for organisations buying in bulk. The French Marine Nationale issued Submariners to its divers. The US Navy tested them. Tudor's military history is arguably richer than Rolex's, because navies bought Tudors.
The watches developed their own identity regardless. The snowflake hands fitted to Submariners from 1969, specified by the French navy for legibility, became a signature the brand still uses. The Monte Carlo chronographs of the early 1970s, with their orange and blue dials, look nothing like anything Rolex made.
The brand withdrew from the US market in 1996 and spent a decade in relative obscurity before returning in 2013 with the Heritage Black Bay, which mined the archive rather than chasing modernity. It worked. Tudor now develops its own movements through a partnership with Kenissi, supplies calibres to Breitling, and holds METAS Master Chronometer certification — a technical position it never had when it was simply the affordable Rolex.
- 1926
- Hans Wilsdorf registers the Tudor name.
- 1946
- Montres Tudor SA is established as a separate company.
- 1969
- Snowflake hands appear on Submariners for the French navy.
- 2012
- The Black Bay revives the brand internationally.
- 2015
- The first in-house Tudor calibre is released.
Also in 6 collections
This watch appears in Stainless Steel Watches (2,797), Automatic Watches (1,432), Back in Stock (842), Sports Watches (695), Dive Watches (488) and Pre-Owned, Ex-Display & Vintage Watches (250).
What the specifications mean
A mechanical watch built to be worn hard and got wet.
Strengths
- 200m water resistance, rated for actual diving
- 39mm suits most wrists
- Sapphire crystal, which resists scratching
- 70-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Worth knowing
- 14.6mm thick, so it will not disappear under a cuff
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 79470 | WBP2150.FT6210 | 01 400 7778 7153-07 7 |
|---|---|---|---|
| Price | £2,850 | £3,360 | £2,750 |
| Case size | 39mm | 40mm | 39mm |
| Water resistance | 200m | 200m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Rubber strap | Titanium bracelet |
| Power reserve | 70 hours | 38 hours | 120 hours |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 200m it is rated for swimming, snorkelling and recreational diving.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
How long does it run for when it's not worn?
About 70 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
20mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 47.2mm, which suits wrists from roughly 16.5cm (6½ inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as unisex, and at this size it suits any wrist that takes the dimensions.
Cheapest place to buy
Mappin & Webb at £2,850, pre-owned. No UK retailer we track lists this reference new.
Is this available new?
Not from the UK retailers we track. This reference is listed as pre-owned only, at £2,850 from Mappin & Webb. A pre-owned watch has been worn, and is normally sold under the retailer’s own warranty rather than the manufacturer’s.
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