Quick answer
A fake Fifty Fathoms white gold is a counterfeit copy of Blancpain's 18k white gold dive watch. Replicas usually use steel or plated base metal, a copied dial, and an Asian movement. The genuine watch is heavier, carries Swiss gold hallmarks, and shows movement finishing that replicas do not reproduce.
What the genuine reference includes
Blancpain builds Fifty Fathoms models in 18k white gold with a sapphire bezel, 300 m water resistance, and the in-house calibre 1315. Caseback engravings are crisp and deep. The crown, bezel action, and dial printing meet a standard that counterfeiters copy poorly.
Prerequisites
- A 10x jeweler's loupe
- A digital scale accurate to 0.1 g
- Reference photos of the exact white gold reference
- A watchmaker who can inspect the movement
- A written return policy from the seller
How to check a Fifty Fathoms white gold for authenticity
- Weigh the watch on a digital scale. An 18k white gold case is substantially heavier than a steel replica of the same size. Compare the result with published specs for the exact reference.
- Inspect the caseback engravings with a loupe. Genuine text is cut deep with clean edges. Replica engraving looks shallow, laser-etched, or uneven at the letter curves.
- Look for Swiss gold hallmarks. An 18k white gold case should show a legal hallmark and a 750 stamp. Replicas often omit the hallmark or stamp it lightly on a plated surface.
- Check the dial printing and applied markers. Genuine printing sits under a loupe with sharp borders. Replica text shows ink spread, uneven spacing, or markers that sit too high.
- Rotate the bezel through one full turn. A genuine sapphire bezel moves with firm, even clicks and no vertical play. A replica bezel feels loose, gritty, or plastic.
- Examine the movement through the display back. Calibre 1315 finishing includes visible bridges, jewels, and a signed rotor. Replica movements show rough edges, wrong engraving, and poor screw heads.
- Test the case for magnetism. White gold is not magnetic. A strong pull toward a magnet points to a steel or plated replica case.
- Confirm the serial and reference with an authorized dealer. Ask the dealer to match the caseback number to the model and production records. Paperwork alone does not prove authenticity.
Common tells on a fake
- Light weight for a precious-metal case
- Gold plating worn thin at the lugs and crown
- Missing or shallow 750 hallmark
- Bezel with vertical play or a cloudy insert
- Movement noise or a rotor that spins loosely
- Box and papers printed with wrong fonts
Legal risk in the United States
Trafficking counterfeit goods is illegal in the U.S. Customs can seize fake watches, and buyers have no warranty or service support. Buy a Fifty Fathoms white gold only from an authorized dealer or a seller who accepts an independent watchmaker's inspection.