A fake IW371741 is a counterfeit of the IWC Portugieser Chronograph, and the fastest way to expose one is the caseback and the movement behind the glass. Genuine references in this family run IWC's 79350 chronograph calibre with a 44 hour power reserve, engraved reference and serial numbers that match the paperwork, and a signed winding rotor. Most fakes get the silhouette right and fail on details you can verify in under two minutes.
What is the IW371741?
The IW371741 is an IWC Portugieser Chronograph reference, part of a line known for a roughly 41 mm case, applied numerals, and feuille hands. IWC publishes factory specifications by reference on its own site, and that listing is the baseline you compare any watch against. Reference numbers change dial color, strap, and case metal, so never judge a watch by the model name alone.
How do you tell a fake IW371741 from a genuine one?
Work from the outside in and stop at the first mismatch. Counterfeiters copy photographs of the dial far better than they copy engineering.
Case, crystal, and finishing
- Genuine cases show crisp, uniform brushing with polished bevels that catch light in a straight line.
- Fakes often show rounded lug edges, soft engraving, and a crystal with a visible purple or blue tint from cheap coating.
- Case dimensions on a real Portugieser Chronograph sit near 41 mm wide by 13 mm thick, and counterfeits are usually half a millimeter to a full millimeter off.
Dial, hands, and printing
- Real dial printing is sharp under a loupe, with even spacing between the IWC logo and the Schaffhausen text.
- Feuille hands on a genuine watch are polished on every face and reach exactly to the printed track, while fakes usually have flat hands with rough tips.
- Subdial spacing is a dead giveaway. A cloned movement often forces the subdials a fraction off center.
Movement and caseback
Ask for a movement photo before you pay. IWC calibres are finished with Geneva stripes, blued screws, and a signed rotor, and no legitimate seller hides that view. Caseback engraving on a fake is typically shallow, laser etched, and wrong in font weight.
Papers, price, and seller
A price far below market for a steel Portugieser Chronograph is the single strongest signal of a counterfeit. Genuine watches come with a matching warranty card, reference, and serial, and a seller who refuses a video call or independent authentication is not selling you a real watch. Selling a counterfeit as genuine is illegal in the United States, and US Customs and Border Protection seizes counterfeit watches at the border.
Why is the IW371741 copied so often?
Clean dress chronographs are easy to photograph and hard to verify from pictures, which makes them attractive to counterfeiters. Strong demand and a price well into five figures new also create a market for look-alike copies.
What should you do if you are offered a fake?
- Walk away and do not send a deposit.
- Report the listing to the platform and, for US sales, to the FTC or CBP.
- If you want the look without the risk, buy a legitimate watch from another brand at a lower price point.
Do replica IW371741 watches ever match the original?
No. Even high end copies use a different movement, different finishing, and different engraving, so they never match the original in serviceability or value. A replica keeps the appearance for a while, but it will not hold resale value and cannot be serviced by an authorized IWC center.