Answer first
There is no Blancpain reference 9250. Blancpain built the X Fathoms as one model, released in 2011, and its catalog number does not contain 9250. A listing that calls a watch an "X Fathoms 9250" is using a number that did not come from Blancpain. Ask the seller what 9250 stands for. It is often a dealer stock code, an auction lot number, or a price typed into a title. None of those make the watch real.
What the X Fathoms is
Blancpain showed the X Fathoms in 2011. The case is titanium and measures 55.65 mm across. Water resistance is 300 m. The movement is Blancpain caliber 9918B with a power reserve of about 120 hours. The dial carries a mechanical depth gauge that reads to 90 m in 1 m steps, a max-depth memory hand, and a 5-minute retrograde counter. Production was small and the retail price was five figures.
Checks that show a fake
- Depth gauge. On a real X Fathoms the depth hand moves when the sensor sits under pressure. On a replica the hand is printed on the dial or fixed to a wheel. A watchmaker with a pressure tester can confirm this in minutes.
- Case size. The real case is 55.65 mm. Many replicas copy a 45 mm Fifty Fathoms case and print an X Fathoms dial.
- Power reserve. Caliber 9918B runs about 120 hours. Common replica movements stop in 38 to 42 hours.
- Engraving. Reference and serial numbers sit between the lugs on the real watch. Check the font, the depth of the cut, and that the numbers match the certificate.
- Price. Real X Fathoms examples sell in the tens of thousands of dollars. An offer at a few hundred dollars is a replica.
- Papers and box. Blancpain ships a certificate, a warranty card with a matching number, and a fitted box.
Why 9250 may appear in a listing
Three common cases: a dealer stock number, an auction lot number, or a price in the title. I could not confirm any Blancpain document that uses 9250 for this model. If the seller cannot show a catalog page or a certificate with that number, treat the number as a sales label.
What to ask the seller
- A photo of the case back with the reference and serial in focus.
- A video of the depth hand moving during a pressure test.
- The movement name and the measured power reserve.
- The source of the number 9250.
Bottom line
The X Fathoms is a 2011 Blancpain dive watch with a working mechanical depth gauge. No version carries reference 9250. If a watch has a printed depth scale, a 45 mm case, or a 40-hour reserve, it is a replica. Buy from a seller who will show a pressure test and matching papers.