Short Answer

IW328042 is a genuine IWC Schaffhausen reference from the modern Pilot's Watch family. A fake IW328042 is a generic Pilot style replica with that number stamped on the case back. Counterfeiters pick real reference numbers because buyers search them, so the number itself proves nothing. You separate the two by checking the case measurements, the dial printing under magnification, the movement inside, and the serial number against IWC service records.

Prerequisites

  • Digital calipers readable to 0.01 mm
  • A 10x jeweler's loupe
  • A gram scale readable to 0.1 g
  • Access to a timegrapher
  • The published spec sheet for the genuine IW328042

How to Inspect an IW328042

  1. Write down the genuine case diameter, thickness, lug width, and case weight before you touch the watch.
  2. Measure the case with calipers at 12 to 6, then across the lugs, and compare each reading to spec.
  3. Weigh the bare watch head on the gram scale, since clone cases often run light.
  4. Study the dial through the loupe, checking the brand text, the model line, and the spacing of the minute track.
  5. Look at the date window for a centered cut, clean edges, and a date wheel with the correct font.
  6. Turn the crown through every position and feel for grit, wobble, or a stem that catches.
  7. Examine the case back engraving for cut depth, straight letterforms, and even spacing between digits.
  8. Remove the case back with the correct wrench and photograph the movement, its rotor, and its finishing.
  9. Run the watch on the timegrapher and record rate, amplitude, and beat error.
  10. Send the serial number and detailed photos to an IWC authorized service center for confirmation.

Red Flags That Show Up Most Often

  • Case diameter that sits half a millimeter outside the genuine figure.
  • Dial text that is too thick, too glossy, or spaced unevenly.
  • A date wheel with a flat, generic font instead of the correct typeface.
  • Case back engraving that looks laser etched rather than cut.
  • A rotor that spins loudly or a movement that is visibly unfinished under the loupe.
  • A serial number that does not appear in IWC's records.

What the Good Fakes Get Right

Top tier replicas copy the case profile, the dial layout, and the strap hardware closely enough to fool a phone camera. The gap appears in the small details: font weight on the dial, gasket quality, crown threading, and the finishing of a movement that was never made by IWC. A timegrapher reading and a serial check close that gap faster than any visual comparison.

Before You Pay

Ask for the original warranty card, the service booklet, and the purchase receipt. Photograph the serial number on the case back and compare it to the paperwork. If the seller refuses an inspection by a watchmaker or an authorized service center, treat the watch as a replica and walk away.