Short answer
A fake IW323762 is almost always a copy of an IWC Ingenieur automatic, and the dial is not where it gives itself away. Start at the back. The caseback engraving, the crown threads, and the finishing on the movement are where the money went on the real watch, and where the copy cut corners. Copies get the silhouette right. They lose the small machining details that cost real hours on a CNC mill.
If you only have two minutes with the watch, spend them on the caseback text and the crown. Those two spots catch most fakes before you ever open the box.
What the reference actually is
The IW3237 family sits inside the Ingenieur line, IWC's steel sports watch built around magnetic protection. Depending on the variant, you get a soft iron inner cage around the movement, a screw-down or push-pull crown, and a bracelet that flows into the lugs without a visible gap. Know the exact variant before you judge anything. A fake is often built from photos of one version and sold as another, so a mismatched dial and case combination can be the first tell.
The caseback
Genuine engraving on an Ingenieur caseback is cut, not stamped, and the letters have walls. Run a fingernail across the text. Real engraving catches slightly and feels sharp. Laser-etched fakes feel flat, and the lettering looks shallow under a loupe, with rounded edges and uneven spacing.
Check the reference number itself. Fakes routinely garble the digits, transpose a pair, or print a reference that belongs to a different case size. Compare every digit against the paperwork and against photos of the exact variant you are looking at.
Crown and threads
Unscrew the crown if the model has a screw-down. Real IWC threads feel smooth and engage in about one and a half turns. Copies feel gritty, catch early, or wobble once seated. Look at the crown logo under a loupe. The relief should be crisp with a flat top and clean edges, not a soft blob.
Dial, hands, and print
- Dial print should sit sharp and raised under a loupe, with no ink bleed into the surrounding lacquer.
- Applied markers should be seated flush, with even polishing and no glue visible at the base.
- Hands should be flat and cleanly finished at the edges, with lume applied evenly and not overflowing the frame.
- The date window should be cut cleanly with a sharp inner edge and correct alignment at the center of the aperture.
Replica dials often look convincing at arm's length and fall apart at 10x. Buy a cheap loupe. It is the best money you will spend on this hobby.
Bracelet and clasp
End links on the genuine watch meet the case with a tight, even line. Push on them. Any flex or rattle at the joint is a warning. Check the clasp engraving for depth and consistency, and open and close it a few times. A real clasp snaps with a solid, damped feel. A copy usually sounds thin and rattles when you shake it near your ear.
Weight and sound
An automatic movement in a steel case has heft and a faint rotor whir when you tilt it. A cheap quartz fake is silent and often too light. Weight alone is not proof, since a builder can add mass, but it is a useful screen when you are looking at photos and asking questions.
Movement and caseback removal
If the seller will let a watchmaker open the back, do it. Look for perlage or Geneva stripes applied with a light hand, blued or polished screws, and a rotor with clean engraving. Replica movements often show raw brass, uneven striping, and screws with chewed slots. The finishing does not have to be beautiful to be real, but it should be consistent.
Box, papers, and the number trail
Fake paperwork is easier to make than a fake watch. The warranty card, the reference on the card, the caseback number, and the movement should all agree. Ask for the original purchase date and dealer. A seller who cannot name a dealer, or who gets defensive about a service history, is telling you something.
Quick checklist before you pay
- Compare all engraving on the caseback to reference photos of that exact variant.
- Feel the crown threads and check the logo relief.
- Loupe the dial print and the marker seating.
- Flex the end links and listen to the clasp.
- Match every number across card, case, and movement.
- Get an independent watchmaker's opinion on anything you cannot verify.
Good replicas exist, and some are decent watches in their own right. They are still not IWC watches, and nobody should pay IWC money for one. Verify first, pay second.