The IW371473 is an IWC Portugieser Chronograph reference, and a fake one usually fails one of four checks: case size and thickness, dial printing and subdial function, caseback engraving, and movement finish. Genuine steel examples in the IW3714 family measure about 41 mm across, stand roughly 12.5 mm tall, and use the IWC calibre 79350, a reworked Valjoux 7750. New retail sits near $8,000, so a "new" example offered at $900 is not a bargain, it is a counterfeit.
What does the reference IW371473 tell you?
IWC reference numbers identify a full specification, not just a model name. The IW371473 falls inside the Portugieser Chronograph line, a bicompax steel chronograph with a vertical subdial layout and a slim bezel. Because the number pins down diameter, dial color, and movement, any deviation from those specs is evidence of a fake or a mismatched watch.
How do you spot a fake IW371473?
Dial and hands
The 12 o'clock subdial counts elapsed minutes, the 6 o'clock subdial runs the small seconds, and the central hand is the chronograph seconds. On most counterfeits these roles are wrong, the subdial spacing is off, or the minute counter jumps instead of sweeping. Applied numerals should be crisp and correctly spaced, and the "IWC" logo plus "Schaffhausen" text must be sharp under magnification, with no fuzzy edges or thick ink.
Hands on a genuine Portugieser Chronograph are leaf shaped and highly polished. Fakes often use flatter hands, printed lume, or a seconds hand that stutters because the movement is a cheap quartz or an unmodified clone.
Case, crown, and pushers
Measure the case with calipers. A 1 mm difference matters, and many fakes run thick because the movement inside needs extra height. The chronograph pushers should start, stop, and reset with a firm, even click, and the crown should match the reference in shape and finish.
Caseback and engraving
Engraving on a genuine IWC is deep, even, and correctly spaced, with the reference and serial numbers in the right format for the production era. Counterfeits show shallow laser etching, wrong fonts, or a serial number that repeats across dozens of listings. If your example has a display back, the caseback text should still be cleanly cut rather than stamped.
Movement
Calibre 79350 beats at 28,800 vibrations per hour with roughly 44 hours of reserve. A genuine movement shows Geneva stripes, blued screws, and an IWC-signed rotor with Probus Scafusia engraving. If the watch has a solid caseback, only a watchmaker can confirm the movement, so budget for that step before you pay.
Why do replica photos look better than the watch?
Sellers use studio lighting, angled shots, and stock images of the genuine watch rather than the piece they ship. Ask for a timestamped photo of the caseback, the crown side, and a running chronograph. If the seller refuses, treats the request as an insult, or only sends catalog renders, walk away.
How can you verify an IW371473 before you buy?
- Photograph the caseback and compare reference and serial fonts against known examples.
- Have a watchmaker open the watch and photograph the movement and rotor.
- Run the chronograph for ten minutes and confirm the minute counter advances.
- Measure case diameter and thickness with calipers.
- Check the strap, buckle, and stitching for signed hardware and correct proportions.
- Buy only from sellers who offer a return window and verified history.
Is buying a replica IW371473 legal in the United States?
Importing counterfeit goods is prohibited, and U.S. Customs and Border Protection can seize watches that carry a counterfeit trademark. Selling a replica as a genuine IWC is fraud and trademark infringement, with civil and criminal exposure. Owning a replica is a different question from reselling one, and the risk rises sharply the moment money and misrepresentation enter the deal.
What do high-end replicas still get wrong?
Even expensive clones struggle with three things: the thinness of the case, the finish on the movement, and the crispness of dial printing. Weight and balance also give them away, because a fake case often feels lighter or oddly balanced on the wrist. If the price is far below market and the seller rushes you, the watch is almost certainly not genuine.