Short answer

A fake IW329070 is a copy of an IWC Aquatimer Automatic from the ref. 3290 group. The real watch is a 42 mm steel dive watch with 300 m water resistance, an inner dive bezel, and IWC caliber 32111. Replica versions copy the case shape and the dial layout. They do not copy the movement, the bezel clutch, or the water resistance testing.

The real reference

IW329070 belongs to the Aquatimer Automatic family, the line IWC refreshed in 2019. Reported specs for the 42 mm Aquatimer Automatic:

  • Case: stainless steel, 42 mm diameter
  • Water resistance: 300 m
  • Movement: IWC caliber 32111, automatic, 120-hour power reserve
  • Bezel: inner rotating ring with the SafeDive system, driven by the outer ring through a clutch
  • Crystal: sapphire with anti-reflective coating on both faces
  • Strap: Quick-Change system, steel bracelet or rubber

Public listings for IW329070 itself are thin. Confirm case metal, dial color, and strap against the IWC reference list before you compare a replica to a photo.

Why this model gets copied

Dive watches sell. The Aquatimer case reads as a tool watch, and the dial carries few printed elements. That makes the layout easy to copy from photos. Steel cases also cost less to machine than gold or ceramic cases.

Where replicas differ

  • Movement: most copies use a Miyota 9015, a Seiko NH35, or a Chinese 2824 clone. None of these are caliber 32111. Beat rate reads 28,800 vph on some builds, 21,600 vph on others.
  • Bezel: the SafeDive clutch is the hard part. Copies use a friction ring. The outer ring turns, but the inner ring slips or lags.
  • Case thickness: copies run 1 mm to 2 mm thicker than the real 42 mm case, because the clone movement and spacer sit deeper.
  • Water resistance: no replica factory pressure-tests to 300 m. Gaskets are the weak point.
  • Finishing: brush direction on the lugs and the crown guard chamfer are the common tells.
  • Caseback: engraving depth and font differ. Compare the reference number and the serial spacing.

Checks to run

  1. Time the beat. 21,600 vph points to a low-grade movement.
  2. Turn the outer bezel. The inner ring should move in steps and hold. Slack points to a copy.
  3. Measure thickness with calipers. Record the number.
  4. Compare the date window and font against a reference photo shot at the same angle.
  5. Ask for a movement photo, not a caseback photo.
  6. Treat any water resistance claim as unverified.

Legal status

Counterfeit watches are illegal to import and sell in the United States. US Customs and Border Protection seizes shipments. IWC does not service copies and does not supply parts for them. Resale value sits near zero.

Limits of this guide

Specs here cover the Aquatimer Automatic 42 mm family. IW329070 may differ in dial color, case finish, or strap. IWC is the source of record.