Short answer: no such watch exists. IW938402 is not a reference number IWC has ever issued, so anything sold under that code is a first copy, a replica, or a code a seller invented to make a listing look official. IWC builds its references from the letters IW plus a digit string tied to a movement family, the way you see in IW3777 or IW5007. A pack starting with 938 does not sit in the brand's catalogue, and no authorised dealer has ever stocked it.

Why the number keeps showing up in search

People usually arrive at IW938402 after seeing it in a marketplace title, an auction lot, or a social post with a photo of something that looks like a Portugieser or a Pilot's Watch. The shot is real. The number underneath it is not. Replica sellers swap in long invented codes because a plausible looking string of digits reads as proof of authenticity to a buyer who has never compared it against the brand's own reference list. Once one listing uses it, copycat sellers reuse it, and the code spreads.

How IWC numbering actually works

  • The prefix is always IW, followed by four or five digits, not six.
  • The digits point to a calibre family and case generation, so the same family shares a number block.
  • Case material and dial variant are handled with suffixes, not with a longer base number.
  • The reference appears on the caseback, and it matches the paperwork and the brand's own model page.

If a code fails any of those checks, treat the listing as a replica until someone proves otherwise.

Red flags on a listing that carries this code

  • No model page on the manufacturer's site matches the reference.
  • Photos are stock images, watermarked, or reused across several sellers.
  • Price sits far below the market for that style, often with wording like first copy, AAA, or mirror quality.
  • The seller dodges questions about the movement, the caseback engraving, or a service history.
  • Payment is asked for by transfer or crypto, with no returns and no receipt.

What first copy actually means

First copy is sales language for a replica, usually one of the better finished ones. It is still not a genuine watch. There is no factory warranty, no service from the brand, no parts support, and resale value close to nothing. A jeweller will not touch it for repair, and customs officers treat counterfeit watches as seized goods. If you want the look and accept those limits, buy with clear eyes. If you want an asset, this is not the route.

Checks to run before you pay

  1. Search the reference on the brand's own site. No hit means no genuine watch.
  2. Ask for a photo of the caseback with the full reference and serial visible.
  3. Compare the case dimensions and dial layout against the real model page.
  4. Pay only through a method that offers buyer protection and a refund window.
  5. Ask directly whether the watch is genuine or a replica. Get the answer in writing.

The honest takeaway is simple. IW938402 is a ghost number, and a ghost number is one of the easiest counterfeit tells you will ever get for free.