The short answer

A fake IW329012 is a counterfeit copy of an IWC Aquatimer Automatic. Reference numbers in the IW3290 block belong to the Aquatimer Automatic family, a steel dive watch with an internal rotating bezel and a crown at 2 o'clock. Replicas of this reference sell for $250 to $900. Genuine examples sell used for several thousand dollars. A price far below market is the clearest sign of a copy.

Published specs for IW329012 are thin outside IWC's own records. Confirm case size, movement and strap with IWC before you judge a watch.

Case, bezel and crystal

  • Diameter: 42 mm on the Aquatimer Automatic. Fakes measure 43 mm to 44 mm. Ask for caliper photos.
  • Weight: a steel case on a rubber strap lands near 90 g. Copies come in 10 g to 20 g light because the case is thinner.
  • Bezel: the inner ring turns with the 2 o'clock crown in 60 clicks. Fakes feel loose or stuck, and the ring drifts off index.
  • Crystal: flat sapphire with anti-reflective coating on both faces. Copies use mineral glass. Check reflections at an angle rather than scratching the surface.
  • Lugs and crown guards: sharp inner edges on copies, chamfered on the original.

Dial, hands and lume

  • Print: indices sit flat and spaced even. Fakes show raised paint, a gap at 12 and a date window cut off center.
  • Lume: a thin applied layer. Copies use a thick pad that glows green and fades inside an hour.
  • Hands: sword hands with a clean bevel. Fakes show a flat stamp and rough edges under 10x magnification.
  • Date wheel: crisp numerals. Copies use a wider font that sits low in the window.

Caseback and movement

IWC engraves the reference, serial and model text with a laser. Lines are thin and repeatable. Fakes use a stamp or a shallow etch with soft edges. The rotor in a genuine automatic movement winds with a soft click. Copies use a low-grade movement with a loud rotor and a 24 to 30 hour power reserve. A timegrapher reading above 15 seconds a day points to a copy.

Papers, box and serial

Ask for the warranty card, booklet and box, then check that the serial on the card matches the caseback. A card with no serial, or a card from a different reference, means a replica. An authorized dealer can confirm a serial and a service history for IWC watches.

Price and seller signals

  • A "new" IW329012 at $400 to $900 is a copy. No genuine example sells at that level.
  • Stock photos on a white background with no caseback shot are a common pattern.
  • Sellers who ship from a warehouse and refuse a video call are a risk.
  • Payment by wire or crypto removes your recourse. Use a card or an escrow service.

Limits of a photo check

Photos cannot confirm movement, crystal material or water resistance. A replica with a good dial passes at 800 px. Ask for a macro shot of the caseback engraving, a timegrapher printout and a photo of the watch on a scale. A seller who cannot supply these is not selling a genuine watch.