Answer

IW329148 does not appear in IWC's public catalog. IWC reference numbers use the format IW plus six digits, for example IW327001 for the Pilot's Watch Mark XVIII. A watch sold as IW329148 is mislabeled by the seller, a typo for another reference, or a counterfeit carrying a number the factory never issued. Treat the number as unverified until IWC confirms it.

How IWC reference numbers work

Each IWC reference holds seven characters: the letters IW and six digits. The first four digits group a model family. The last two digits mark the dial, case metal, and strap combination. IW3270 covers the Mark XVIII. IW3271 covers later Mark XVIII variants. A number outside the published range has no factory build sheet and no parts list.

What the IW3291 block covers

I cannot confirm a full model list for the IW3291 block from open sources. Search the exact reference on iwc.com before you buy. Confirm four items against the listing: case diameter, case metal, dial color, and movement caliber. If the seller cannot name the caliber, stop there.

Checks on the watch

  • Case back: reference and serial numbers are engraved, not printed. Check depth, spacing, and font weight.
  • Serial number: ask an IWC boutique or authorized service center to match the number against service records.
  • Movement: IWC builds its own calibers. A display back on a copy shows an undecorated third-party movement with no IWC engraving.
  • Dial: applied metal markers. Printed markers with rough edges point to a copy.
  • Price: genuine IWC Pilot watches trade between $3,000 and $7,000 USD on the secondary market. A new listing under $500 sits far outside that range.
  • Papers: the warranty card number matches the case back number. Mismatched numbers are a problem.

Listing language

Sellers describe counterfeit watches with terms such as 1:1, AAA, Swiss clone, and super clone. These words describe no factory specification and no quality standard. No Swiss brand uses them for its own products.

Legal status in the US

Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320. A first offense carries up to 10 years in prison and a $2,000,000 fine for an individual. US Customs and Border Protection may seize counterfeit watches at import. Personal use does not create an exemption. Money spent on a seized counterfeit item is not recovered.