Short answer

The IW329040 sits in the IWC Pilot's Watch Mark XVIII family. That family uses a 40 mm case, a 20 mm lug width, about 11 mm of thickness, a sapphire crystal, and a 6 bar water resistance rating. IWC fits the steel Mark XVIII with caliber 35111, an automatic movement with a 42 hour power reserve. Replica sellers price this reference from about $100 to $500. Price tracks three things: the movement, the dial print, and the case finishing. A replica is not a genuine IWC and does not match one.

Verify the reference first

IWC reference numbers in the 3290 block cover more than one dial color, strap, and case metal. IWC's own product page is the only reliable source for the exact IW329040 build. Treat any dealer claim about dial color, hands, or strap type as unverified until you check it against that page. Details that change between references: dial finish, date wheel color, hand shape, strap material, and caseback engraving.

Case and dial checks on a replica

  • Diameter: 40 mm. A 42 mm or 44 mm case is a different model.
  • Lug width: 20 mm. Measure the gap between the lugs.
  • Thickness: about 11 mm. Thicker cases often hide a low-grade movement.
  • Dial print: IWC logo, "Schaffhausen", and "Automatic" lines. Compare font weight and letter spacing against photos.
  • Date window: at 3 o'clock, white background, black print on the common versions.
  • Crystal: sapphire with anti-reflective coating. Mineral glass is common on cheap builds and scratches in weeks.
  • Caseback: the steel Mark XVIII uses a solid back with an engraved aircraft motif. Check the original before you accept a display back.

Movement tiers

Three groups show up in the replica market. Entry builds use a quartz module or a low-grade automatic. Mid-tier builds use a Miyota 9015 or a Seagull automatic. Miyota rates the 9015 at 28,800 vibrations per hour, 24 jewels, and a 42 hour reserve. Top-tier builds use a Sellita SW300-1 or a cloned equivalent. Sellita rates the SW300-1 at 25 jewels and a 42 hour reserve. Baseline checks: the second hand should sweep in small steps, and the date should flip near midnight. Shake the watch near your ear. A rotor that rattles points to a loose bearing.

Prices

Entry automatic builds ask about $100 to $180. Miyota and Seagull versions with cleaner dial print ask about $200 to $300. Sellita-based builds with sapphire and a signed caseback ask $350 and up. Ask the seller for photos of the movement, the date flip, and the caseback threads before payment.

Limits

A replica carries no IWC warranty, no service history, and no resale market. Water resistance claims from replica sellers are unverified. Do not swim with one. A local watchmaker can regulate a Sellita or Miyota movement. Parts for cloned movements can be hard to source.