IWC reference IW329091 belongs to the Aquatimer Automatic 42 family. A replica of it copies a 42 mm steel dive watch with a 300 m depth rating, a sapphire crystal, and an internal rotating dive bezel. The gap is the movement. Copies run third-party automatic calibres with 38 to 42 hours of power reserve. IWC lists 120 hours for calibre 32111 inside the genuine watch.
Public catalogs group several IW3290xx references with different dial and strap combinations. I could not confirm which dial color IW329091 carries. Use seller photos and compare them to catalog pages before you pay.
The watch being copied
IWC added the Aquatimer Automatic 42 to its dive line in 2022. Specs on the genuine watch:
- Case: stainless steel, 42 mm diameter, about 14 mm thick
- Water resistance: 300 m
- Crystal: sapphire with antireflective coating
- Bezel: internal rotating dive bezel, set by a second crown
- Movement: calibre 32111, automatic, 120-hour power reserve
- Strap: rubber or steel bracelet with a quick-release system
Movement options in replicas
- Clone of the ETA 2824-2. 28,800 vph, about 38 hours of reserve.
- Miyota 9015 or 9039. 28,800 vph, about 42 hours.
- Base movement with decorative plates shaped like the 32111. Same running time as the base, no 120-hour reserve.
Ask the seller for the movement name and the beat rate. A 21,600 vph movement in a dive watch listing is a low-grade sign.
Case, bezel, and crystal checks
Most replicas use 316L stainless steel. Some sellers offer 904L at a higher price. Both polish to a similar look. The internal bezel is the hardest part to copy. Check that the triangle lines up with 12 o'clock when the crown seats, and that the bezel turns in one direction with no slack.
Crystals range from mineral glass to sapphire with coating. Sapphire rings sharper under a fingernail tap. Coating haze shows under a lamp.
Bracelet and strap
End link fit decides how the watch wears. Press the bracelet against the case and look for a gap. Screw-in links beat pin links on a 42 mm case. Rubber straps vary in hardness. Soft straps pick up dust and stretch at the buckle.
Water resistance
Sellers list 300 m. That number comes from the original. Copies have no pressure test. Gaskets and caseback threads vary by batch. Get the watch tested at a shop before any contact with water. Many copies fail past 50 m.
What to check before you buy
- Measure the case with calipers. 42 mm, not 43 or 44.
- Confirm the movement and its beat rate.
- Look at date font and date window position.
- Check dial print, index alignment, and lume color.
- Turn the inner bezel crown through a full cycle.
- Ask for a photo of the caseback threads and gasket.
Where replicas stay different
- Power reserve: 38 to 42 hours against 120 hours.
- Movement finishing and rotor engraving.
- No IWC warranty, no service network, no serial registration.
- Resale value near zero.
Price range
Listings for this reference sit between about $250 and $600. Higher prices claim Swiss movements or 904L cases. Ask for movement photos before paying more. No replica matches the genuine watch on the movement, and that is the main thing your money buys at retail.