Short answer

IW329147 is an IWC reference. It sits in the IW3291 block of reference numbers, which covers the Pilot's Watch Automatic line. That line uses a 41 mm steel case and IWC calibre 32111, a 4 Hz automatic with a 120-hour power reserve and a date window.

Replicas of this reference appear less often than replicas of the Mark XVIII, the Mark XX, or the Big Pilot 43. Three build tiers exist. Street prices run from about $120 to $550. A replica cannot match the 120-hour reserve, so that number works as a test at the point of sale.

What the reference covers

IWC groups reference numbers by family. The IW3291 block covers Pilot's Watch Automatic models: steel case, 41 mm diameter, sapphire crystal, and the calibre 32111 with a 120-hour power reserve.

Public spec pages for the exact reference are thin. Confirm dial color, case size, and strap code with IWC before you treat any seller listing as a baseline.

Build tiers

  • Entry, $120 to $180. Mineral glass or low-grade sapphire, printed dial, Miyota 8215 or a 21,600 vph Chinese automatic, folded clasp, hollow end links.
  • Mid, $220 to $350. Sapphire with one-side coating, applied markers, Miyota 9015 or Seagull ST2130, solid end links, decent lume.
  • Top, $400 to $550. Sapphire with coating on both faces, closer case profile, decorated or clone movement, correct date font.

Movements

The genuine calibre 32111 runs at 28,800 vph with a 120-hour reserve. Replica movements in this size:

  • Miyota 9015 or 8215. Reserve near 42 hours at 28,800 vph for the 9015, or 21,600 vph for the 8215. Reliable and easy to service.
  • Seagull ST2130. Clone of the ETA 2824 layout, reserve near 38 hours.
  • Decorated Chinese automatics with IWC-style rotor engraving. The finish looks right in photos. The specs do not match.

Ask the seller for a timegrapher photo. Look for a rate inside plus or minus 10 seconds per day, amplitude above 250 degrees, and beat error under 0.5 ms.

Checks before payment

  • Caseback photo with the reference and serial visible. Blurred or missing stamps are a warning.
  • Calipers on the case, measured across the bezel and lug to lug.
  • Date change at midnight, not at 23:00. Note the exact time on the photo.
  • Dark photo of the lume. Weak or uneven glow points to a printed dial.
  • Crown operation. Screw threads should catch in two turns or fewer.
  • Payment method. Card and escrow give a route to a refund. Wire and crypto do not.

Legal note

In the United States, 18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime. Penalties reach 10 years for a first offense. U.S. Customs and Border Protection seizes counterfeit shipments, and no personal-use exemption covers counterfeit merchandise. One watch bought for personal wear still puts the shipment at risk, and the buyer loses the money.

What is not public

Factory names, batch sizes, and the workshop behind a given watch are not published. Sellers set their own tier labels. Treat any tier name as marketing until the photos and timegrapher numbers support it.