Answer: A replica Big Pilot IW5105 is a copy of an IWC Big Pilot watch. It is not made by IWC. Sellers use the reference to signal a pilot watch with a large crown, a black dial, and a steel case. Quality depends on the case, dial, crystal, movement, and markings. Photos alone do not prove quality. Ask for measurements and a movement photo.
What IW5105 means
IW5105 is an IWC-style reference used in replica listings. IWC uses IW50xxxx and IW32xxxx references for Big Pilot models. Case size and movement vary by reference. A seller may use IW5105 for a 46 mm style or a 43 mm style. Confirm the case diameter, lug width, and movement before you pay.
Specs to compare
- Case: steel, 43 mm or 46 mm. Measure the case without the crown.
- Crown: large conical crown. Check thread engagement and stem length.
- Crystal: sapphire is standard on higher tiers. Mineral glass scratches.
- Dial: black finish, white print, 12 o'clock triangle, and date window. Check print sharpness and date font.
- Movement: automatic, 21,600 vph common in replicas. Power reserve often 38 to 42 hours. Many IWC Big Pilot references use a 7-day reserve. Time the reserve.
- Caseback: engraving depth and reference text. Compare with an IWC catalog photo for the exact model.
Checks before buying
- Ask for a photo of the movement and the caseback.
- Ask for case diameter, thickness, and lug width in millimeters.
- Ask for a power reserve test result and a timegrapher report.
- Confirm return terms and warranty in writing.
- Check customs rules for your country. Replica watches may be seized.
Limits
A replica does not carry IWC warranty or service. Parts may not fit a genuine watch. Resale value is low. Water resistance claims need a pressure test. A seller who gives no measurements, no movement photo, and no return terms gives you no basis to judge the watch.