Quick answer
The Blancpain X Fathoms is a 55.65 mm titanium dive watch with a mechanical depth gauge that reads to 90 m. No known replica maker copies that gauge. Replica X Fathoms watches sell as visual approximations: steel case, printed dial, generic automatic or quartz movement, no depth sensor, no 120-hour reserve. The number 5000 in a listing is not a Blancpain reference.
Genuine X Fathoms specs
- Case: grade 5 titanium, 55.65 mm wide, about 24 mm thick
- Water resistance: 300 m
- Movement: caliber 9918B, automatic, three barrels, 120-hour power reserve
- Depth gauge: 0 to 90 m, mechanical, with max-depth memory
- Dial: 15-minute retrograde counter, 5-minute decompression stop indicator
- Bezel: sapphire with a 60-minute scale
- Catalog status: Blancpain's current catalog does not list the X Fathoms
What a replica can match
Copies come from photos and case molds. A decent copy gets the outline, the crown guards, the rubber strap texture, the orange accents, and the dial text. The crystal and the brushed case finish read as titanium from a short distance. The watch runs and keeps time within a few seconds a day. Strap and clasp swap with the same tools a jeweler uses on any dive watch.
What a replica cannot match
The depth gauge carries the watch. Blancpain uses a membrane and a rack that moves a hand as water pressure rises. That assembly sits behind the caseback and needs its own sealed window. A copy with a quartz movement has no space and no parts for it. Copies that show a depth hand use a printed scale or a calendar wheel. The retrograde 15-minute counter gets the same treatment: a fixed pointer or a printed arc. The three-barrel movement is a third gap. A 120-hour reserve needs the real gear train.
X Fathoms, 500 Fathoms, Fifty Fathoms
The 500 Fathoms arrived in 2009: 48 mm titanium case, 1000 m rating, caliber 1315 with a five-day reserve. The X Fathoms added the gauge, the retrograde counter, and more case. The standard Fifty Fathoms runs 45 mm and 300 m. Replica sellers mix the three names, so check the case size and the dial text against the original model.
Where the 5000 fits
5000 is not a model number. Blancpain reference numbers for the X Fathoms begin with 5018. A listing that says X Fathoms 5000 may mean 5,000 US dollars, a seller code, or a stock photo label. Replica dive watches sell from about $100 to $700 across tiers. The genuine watch sells in the five figures on the secondary market.
Checks before you pay
- Movement named in the listing. No name means no service parts.
- Depth rating: a 300 m claim on a copy is untested. Do not dive with it.
- Bezel: sapphire on the real watch, mineral glass or a printed ring on many copies.
- Weight: titanium is lighter than steel, so a steel copy of the same size weighs more.
- Seller terms: returns, payment method, and shipping paperwork.
Legal note
Counterfeit watches infringe trademarks. Trafficking in counterfeit goods is a federal crime in the US under 18 U.S.C. 2320, and CBP seizes shipments at the border. Resale carries the same exposure as import.
No factory publishes a spec sheet that matches the genuine X Fathoms. Treat each listing as a claim, not a fact.