Is your Fifty Fathoms
the real deal?
The Blancpain Fifty Fathoms is the original modern dive watch, created in 1953 for the French Navy. Its iconic design and surging popularity have made it a prime target for counterfeiters producing increasingly sophisticated fakes.
How to authenticate a Fifty Fathoms
Unidirectional Bezel
The Fifty Fathoms' sapphire bezel insert with luminous markers is distinctive. It should rotate counter-clockwise only with precise 1-minute clicks and a solid feel. The sapphire insert should be scratch-free and deeply saturated in color. Counterfeits have loose bezels with imprecise clicks and cheap aluminum or painted inserts.
Luminous Markers
Genuine Fifty Fathoms uses Super-LumiNova applied indices that are generous in size and glow brightly and evenly in the dark. The lume should have a consistent green glow with strong initial brightness. Counterfeits have thin, uneven lume application with weak or patchy glow.
Caliber 1315 Movement
Through the sapphire case back, the Cal. 1315 displays three mainspring barrels, a signed gold rotor, and exceptional finishing with Côtes de Genève stripes and beveled bridges. It provides a 5-day power reserve. Counterfeits use generic movements that don't match the genuine caliber's architecture.
45mm Case Proportions
The standard Fifty Fathoms has a 45mm case with thick, curved lugs and a substantial wrist presence. Despite its size, it should wear comfortably due to the lug curvature. The case should be heavy solid steel. Counterfeits often get the case thickness, lug shape, or overall proportions wrong.
Screw-Down Crown
The crown features the Blancpain logo and screws down firmly for water resistance. It should thread smoothly with no wobble. The crown guards should be properly shaped. Counterfeits have loose crowns with poor thread engagement and malformed crown guards.
Dial Typography
The "BLANCPAIN" text and "Fifty Fathoms" script should be perfectly printed. The depth rating should read precisely. All text should be in the correct Blancpain font with consistent weight. Counterfeits have wrong fonts, uneven printing, or misaligned text.
Fifty Fathoms counterfeit warning signs
Aluminum Bezel Insert
Genuine Fifty Fathoms uses a sapphire bezel insert, which is extremely scratch-resistant. If the bezel shows scratches, has a matte aluminum look, or the markings appear printed rather than under sapphire, the watch is counterfeit.
Weak Lume Performance
After exposure to light, genuine Fifty Fathoms indices glow brightly and evenly for hours. If the lume is dim, patchy, or fades very quickly, the watch uses cheap luminous material and is counterfeit.
Wrong Movement Through Case Back
The Cal. 1315 has a specific three-barrel architecture. If the movement visible through the case back doesn't show three barrels, a gold rotor, and Blancpain-level finishing, the watch is fake.
Incorrect Case Weight
The 45mm Fifty Fathoms in steel is a substantial watch. If it feels light or the bracelet/strap attachments feel flimsy, it is made from inferior materials and is counterfeit.
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Frequently asked questions
What is the history of the Fifty Fathoms?
The Fifty Fathoms was created in 1953 for the French Navy's combat swimmers, making it the first modern dive watch. Its design predated the Rolex Submariner by several months. The name refers to the approximate depth limit (about 91 meters) considered the maximum for scuba diving at the time. Jean-Jacques Fiechter, Blancpain's CEO and an avid diver, designed it based on his own diving experience.
How much does a Fifty Fathoms cost?
Current Fifty Fathoms models range from approximately $10,500 for the Bathyscaphe in steel to over $25,000 for the standard Fifty Fathoms and up to $50,000+ for precious metal versions. The limited editions and Fifty Fathoms MIL-SPEC can command significant premiums on the secondary market.
What movement does the Fifty Fathoms use?
The standard Fifty Fathoms uses the Blancpain Caliber 1315, an in-house automatic movement with a 5-day (120-hour) power reserve, silicon balance spring, and three mainspring barrels. The Bathyscaphe uses the Caliber 1315. Both feature beautiful finishing visible through the sapphire case back.