Kensington Watches
Blancpain Fifty Fathoms Grande Date 45mm Mens Watch Black

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Blancpain

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.

All Blancpain watches

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
Best forDivingSwimmingEveryday wear
Less suited toSmall wristsUnder a shirt 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.

Fifty Fathoms Grande Date 45mm Mens Watch Black compared with 2 alternatives from other brands
SpecificationThis watchFifty Fathoms Grande Date 45mm Mens Watch Black5050-12B30-98BGirard-PerregauxLaureato Absolute WW.TC81065-21-491-FH6AGlashütte OriginalOriginal SeaQ Panorama Date 43mm Mens Watch1-36-13-03-90-33
Price£20,200£14,300£25,400
Case size45mm44mm43.2mm
Water resistance300m300m300m
MovementAutomaticAutomaticAutomatic
StrapTitanium braceletRubber strapRubber strap
Power reserve120 hours46 hours
This watch
  • Costs less
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  • Wears smaller

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 explained

Will the glass scratch?

Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.

Sapphire, mineral and acrylic compared

Does 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 compared

How 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 wrist

Is 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.

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