Answer first

A replica IW329132 copies an IWC Aquatimer Automatic 42. IWC reference numbers that start with IW3291 sit in that line. Not every IWC catalog lists the .132 suffix, so confirm case material, dial color and strap against IWC or an authorized dealer before you trust a spec sheet.

Genuine reference specs

Aquatimer Automatic 42 numbers, from the IW3291 block:

  • Case: stainless steel, 42 mm diameter, about 14.3 mm thick
  • Crystal: sapphire, anti-reflective coating
  • Water resistance: 300 m
  • Movement: IWC automatic calibre 30120 or 32111
  • Frequency: 28,800 vph (4 Hz)
  • Power reserve: 42 hours on the 30120, 120 hours on the 32111
  • Strap: rubber or steel bracelet, tool-free change system

The SafeDive bezel

The outer ring drives an inner dive scale. The inner scale turns counterclockwise and stops at 60. That is the IWC SafeDive system. A copy that pins the inner scale, or that lets it turn both ways, is cosmetic.

Strap system

The genuine case takes IWC's quick-change strap. Most replicas ship with standard spring bars and a small tool. The mismatch shows when you flip the watch over.

Replica tells to check

  1. Thickness. Measure with calipers. Clones run 1 mm to 2 mm thicker than 14.3 mm.
  2. Crystal. Mineral glass scratches. Sapphire does not. Tap a fingernail on the edge.
  3. Dial print. The IWC wordmark uses a thin sans serif. Replica print looks heavier and fills in near 6 o'clock.
  4. Lume. Genuine lume glows for hours. Weak paint fades in 20 minutes.
  5. Bezel action. Turn the inner scale by hand. Feel for detents.
  6. Movement. Look for a Miyota 9015, a Seagull ST2130, or a decorated clone. Rotor engraving and perlage differ from IWC finish.

Price bands

Listings for this reference run about $80 to $500. Below $100 you get mineral glass, a stamped case back, and an entry automatic. Above $300 you get sapphire, a 316L case, and a Miyota or Seagull movement. No replica at any price is pressure tested to 300 m. Do not dive with one.

Legal note

IWC is a registered trademark. Selling a watch that carries the IWC name or logo without authorization is trademark infringement in the United States. U.S. Customs and Border Protection seizes counterfeit watches at ports. Personal import can end in seizure and a letter, even when no charge follows.