
Tap the image to enlarge

Blancpain Fifty Fathoms Grande Date 45mm Mens Watch Black
Ref. 5050-12B30-98B
The 45mm case is satin-finished Grade 23 titanium, measuring 16.25mm thick, with a lug-to-lug distance of 50.7mm. The black dial carries applied luminous Arabic numerals, baton indices, and broadsword hands, with a twin-aperture grande date display positioned at six o'clock. The unidirectional rotating bezel has a 120-click action and a domed sapphire insert with a fully luminescent 60-minute diving scale. Both the crystal and the exhibition caseback are cambered sapphire with anti-reflective coating on both sides. Calibre 6918B runs at 28,800vph via three series-coupled mainspring barrels, delivering a 120-hour power reserve. A silicon hairspring provides magnetic resistance. The watch is rated to 300 metres and sits on a satin-finished titanium bracelet with solid end links.
- Reference
- 5050-12B30-98B
- Brand
- Blancpain
- Collection
- coupled mainspring barrels
- Case size
- 45mm
- Case thickness
- 16.25mm
- Case material
- Titanium
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Automatic
- Calibre
- 6918B
- Functions
- Date
- Water resistance
- 300m
- Bracelet / strap
- Titanium bracelet
- Strap colour
- Silver
- Lume
- Luminous
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 50.7mm
- Power reserve
- 120 hours
Learn more about Blancpain
Jehan-Jacques Blancpain registered as a watchmaker in Villeret in 1735, which makes Blancpain the oldest name in the industry by registration date. The dial still carries JB 1735.
The claim comes with an asterisk the house is candid about: production stopped during the quartz crisis. The name was dormant until Jean-Claude Biver and Jacques Piguet bought it in 1983 and relaunched it on a defiantly contrarian promise — there has never been a quartz Blancpain, and there never will be. In a market then convinced mechanical watchmaking was finished, this proved commercially astute as well as romantic.
The technical high-water mark of the modern era came in 1991 with the 1735 Grande Complication, which combined a tourbillon, perpetual calendar, moon phase, minute repeater, and split-seconds chronograph in one wristwatch.
Blancpain's other lasting contribution is the Fifty Fathoms of 1953, developed with French combat divers and predating the Submariner. It established the vocabulary of the dive watch — rotating bezel, high legibility, real water resistance — and remains the collection most buyers know.
The Swatch Group acquired the brand in 1992. The Villeret line continues the classical side of the house: round cases, double stepped bezels, and complications presented without ornament.
- 1735
- Jehan-Jacques Blancpain registers as a watchmaker in Villeret.
- 1953
- The Fifty Fathoms establishes the modern dive watch.
- 1983
- Jean-Claude Biver and Jacques Piguet revive the dormant brand.
- 1991
- The 1735 Grande Complication is released.
- 1992
- Acquired by the Swatch Group.
Also in 5 collections
This watch appears in Automatic Watches (1,753), Watches 44mm and Over (811), Sports Watches (793), Dive Watches (566) and Titanium Watches (180).
What the specifications mean
A mechanical watch built to be worn hard and got wet.
Strengths
- 300m water resistance, rated for actual diving
- 50.7mm lug-to-lug keeps the 45mm case wearable
- Sapphire crystal, which resists scratching
- 120-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Worth knowing
- 45mm is a large watch with real presence
- 16.25mm thick, so it will not disappear under a cuff
Blancpain Fifty Fathoms Grande Date alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 5050-12B30-98B | 81065-21-491-FH6A | 1-36-13-03-90-33 |
|---|---|---|---|
| Price | £20,200 | £14,300 | £25,400 |
| Case size | 45mm | 44mm | 43.2mm |
| Water resistance | 300m | 300m | 300m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Titanium bracelet | Rubber strap | Rubber strap |
| Power reserve | 120 hours | 46 hours | — |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 300m it is rated for swimming, snorkelling and recreational diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 120 hours fully wound — enough to sit off the wrist over a weekend and still be running.
Will it fit my wrist?
Lug-to-lug is 50.7mm, which suits wrists from roughly 17.5cm (7 inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Mappin & Webb is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
More Blancpain watches like the Fifty Fathoms Grande Date
In stock, and close on style and price









