A fake IW371498 is a counterfeit copy of the IWC Portugieser Chronograph reference, not a genuine IWC watch. The most reliable way to spot one is to compare case proportions, dial printing, subdial layout, date alignment, movement finishing, and reference engravings with verified photos, then have the watch inspected by a qualified watchmaker.
What the IW371498 reference is
IW371498 is an IWC reference number in the Portugieser Chronograph family. That matters because counterfeiters often copy the general look of the family while missing details specific to the reference. Reference numbers identify a combination of case, dial, hands, strap, and movement configuration. A watch can look like a Portugieser Chronograph and still be the wrong reference for the listing. Check the full reference, not just the model name.
How to spot a fake IW371498
No single check proves authenticity. Use several checks together, and treat photos and paperwork as supporting evidence only.
- Dial layout: The Portugieser Chronograph uses two counters, with the chronograph minutes counter at 12 and running seconds at 6, plus a date window at 3. A fake may shift subdials, use faux counters, or misalign the date.
- Printing and markers: Genuine dial text is crisp and evenly spaced. Applied indices should sit flush and reflect light cleanly. Fuzzy printing, thick font, or uneven lume are warning signs.
- Case and pushers: Check lug shape, case thickness, crown size, and pusher spacing. Counterfeit cases often feel thicker or have softer edges.
- Hands: Look at hand length, finish, and how each hand aligns with the track. Subdial hands should reach the marks without overhanging.
- Crystal: The crystal should be clear, with even anti-reflective treatment and no rainbow haze at angles.
- Caseback engravings: Reference and serial engravings should be deep, clean, and consistent. Laser-printed or shallow engraving is a red flag.
- Strap and buckle: Stitching, leather grain, buckle finish, and logo stamping should match the reference. Cheap hardware is common on fakes.
Movement and function checks
A faithful IW371498 should behave like a mechanical chronograph, not a quartz watch with decorative subdials. Start and stop the chronograph several times. The pushers should feel firm and repeatable, and the reset should snap back to zero. On a watch with a display back, inspect rotor engraving, bridge finishing, and overall movement neatness. A rough movement, incorrect rotor text, or a running seconds hand in the wrong subdial is a strong warning. If the seller cannot show a clear movement photo or refuses an inspection, walk away.
Paperwork, price, and provenance
Boxes and papers are easy to fake, so do not rely on them alone. Match the reference and serial across the watch, warranty card, and service records. Ask for the seller’s history and return policy. A price far below the current market range is a warning sign, not proof by itself. For a high-value watch, pay for an independent inspection before funds change hands. A reputable dealer will not object to a watchmaker opening the case.
Legal and ownership risks
Counterfeit watches can be seized at import, and selling one can create legal exposure. A fake IW371498 also has no IWC warranty, no reliable service path, and poor resale value. If your goal is to own the look of a Portugieser Chronograph, compare the total cost of ownership against a legitimate pre-owned watch and a reputable homage. If your goal is to avoid a fake, buy from an authorized dealer or an established pre-owned seller with a written authenticity guarantee.