Short answer

IW329082 is an IWC reference number inside the Aquatimer Automatic 42 family, coded IW3290xx. Public IWC catalog pages list few variants under this exact number, so treat any seller claim about it as unverified until IWC confirms the dial color, case metal, and strap. A fake IW329082 is a replica built to copy that model. Replica prices for this family land between $200 and $600. Genuine Aquatimer Automatic 42 pieces trade between $3,000 and $6,000 on the secondary market.

What the reference number tells you

IWC encodes the family first. IW3290 points to the Aquatimer Automatic 42. The last digits mark dial, case, and strap options. Sellers who list IW329082 often show no IWC warranty card and no service history. Ask for a caseback photo. The reference and serial are engraved on the caseback, and the reference also appears between the lugs.

Checks that catch most replicas

  • Caseback engraving. Genuine IWC text is cut into the metal with sharp edges. Replica text looks shallow or laser-etched.
  • Bezel action. The external bezel drives an inner ring through the SafeDive system. Genuine clicks are firm and land on the minute mark. Replicas feel loose or grind.
  • Dial logo. The IWC wordmark is applied metal. Replicas print it flat.
  • Date window. Font matches the dial text. Replicas show thick numerals or an off-center window.
  • Crystal. Double-sided anti-reflective coating on the genuine piece. Replicas show one coating or a blue tint.
  • Lume. Even application on hands and markers. Replicas show lumps or uneven color.

Movement

Genuine Aquatimer Automatic 42 models run IWC calibre 30120, based on a Sellita SW300-1 with the Pellaton winding system. Rate is 28,800 vph. Power reserve is about 42 hours. Replicas use an ETA 2824 clone or a Miyota 9015. Neither uses Pellaton winding. Rotor engraving on replicas is shallow, and the rotor finish lacks Geneva stripes.

What photos cannot show

Photos hide weight, crown feel, and bracelet rattle. A genuine steel case weighs more than a replica of the same size. Ask for video of the seconds hand sweep and the bezel rotation. If the seller refuses, stop.