A fake IW371673 is a counterfeit copy of an IWC Portugieser Chronograph, built to look like the reference rather than to be it. The number belongs to IWC's Portugieser Chronograph family, so a watch sold under that reference should match the manufacturer's own published specs for case size, dial layout, and movement. Counterfeits usually fail in the same few places: printing, subdial spacing, caseback engraving, and the chronograph caliber inside.

What the IW371673 reference actually is

IWC reference numbers start with IW followed by digits, and the middle block identifies the model family. IW3716xx points to the Portugieser Chronograph line, while the final digits mark a specific variant, such as case metal, dial color, and strap. That means IW371673 is one configuration, not a general label for the whole line.

Replica sellers like real reference numbers because they sound precise. The tell is that the watch on offer rarely matches the specs tied to that number. Before you judge any listing, confirm the exact case diameter, movement caliber, water resistance, and dial finish IWC lists for the reference, then compare.

Telltale signs of a fake IW371673

Dial and printing

  • Text weight and spacing: genuine dial printing is thin, sharp, and evenly spaced. Fakes often show thick, fuzzy, or crowded lettering.
  • Subdial positions and size: a counterfeit frequently shifts the subdials or resizes them, which changes the whole balance of the dial.
  • Date window: look for a misaligned aperture, a date wheel with the wrong numeral font, or a window cut too close to a subdial.
  • Hands: check length, finish, and whether the hands reach the correct track instead of stopping short.

Case, crown, and caseback

  • Finishing transitions between brushed and polished surfaces should be crisp and consistent around the lugs and bezel.
  • Caseback engraving depth and font matter. Shallow laser etching or a soft, rounded typeface is a warning sign.
  • Serial numbers should be unique to the watch. A number that appears across several listings is copied.
  • Pushers and crown should feel solid, with clean threading and no grit when you operate them.

Movement and chronograph behavior

Genuine Portugieser Chronograph watches run an IWC chronograph caliber. Counterfeits commonly hide a generic chronograph module or a quartz movement behind a decorated caseback, so a clear movement photo matters more than any sales copy.

  • Pusher action should be firm, with a clean start, stop, and reset.
  • The running seconds layout must match the reference, whether that is a small seconds subdial or a central hand arrangement.
  • Winding feel and rotor noise give away cheap movements quickly.
  • If the seller refuses a movement photo or an inspection, treat the watch as unverified.

Strap, clasp, and packaging

Check clasp engraving, stitch density, and leather quality. Boxes and papers are easy to forge, so documents alone never prove a watch is genuine. They only add context to an inspection that already passed.

How to confirm a reference before buying

  1. Look up the reference on IWC's official site and note the exact specs for that variant.
  2. Ask the seller for the reference and serial number in writing, plus dated photos of the caseback.
  3. Have an independent watchmaker open the caseback and identify the movement.
  4. Compare the dial against official product photos at close range, not against other listings.
  5. Question any price that sits far below the going rate for that reference in good condition.

Risks of buying a replica IW371673

  • Counterfeit watches are illegal to import in many countries and can be seized at customs.
  • IWC will not service or supply parts for a watch it did not make.
  • Resale value is close to zero, and repair options are limited to generic parts.
  • Replica listings often reuse stolen photos and fabricated reviews, so the watch you receive may not match the one pictured.

Questions worth asking a seller

  • Can you send a photo of the movement with the caseback removed?
  • What is the exact reference and serial number?
  • Is the watch available for inspection by my watchmaker?
  • Do you accept a return if the movement does not match the reference?

A fake IW371673 is easiest to catch before money changes hands. Match the reference against official specs, inspect the movement, and treat any refusal of verification as your answer.