What a replica IW323734 is

A replica IW323734 is a third-party copy of the IWC reference IW323734. IWC does not make it, sell it, or service it, and it carries no manufacturer warranty. Copies sit in tiers. The best match the published case diameter, thickness, and lug width and run a 28,800 vph movement. The worst sit a millimeter thick on the wrist, use a 21,600 vph movement, and show soft dial print under a loupe. The checks below run from the outside in, because case and movement decide value and the dial only decides first impressions.

Before you inspect

  • Digital calipers, 0.01 mm resolution
  • 10x jeweler's loupe
  • Kitchen scale accurate to 1 g
  • Timegrapher, or a watchmaker who owns one
  • Flashlight for lume checks

Step 1: Measure the case

  1. Set the calipers across the bezel at 12 and 6 o'clock and record the diameter.
  2. Measure thickness at the center of the caseback with the watch flat on a bench.
  3. Measure the gap between the lugs to confirm lug width.
  4. Weigh the bare watch head and note the figure.
  5. Compare all four numbers with IWC's published spec for IW323734 and reject any gap over 0.3 mm.

Step 2: Read the dial and crystal

  1. Hold the loupe to the dial print and check that each letter has crisp edges and even depth.
  2. Check that the applied indices sit level and that the gap to the chapter ring is equal all the way around.
  3. Look at the date window for a centered number and a clean cut edge.
  4. Tilt the watch under a lamp to test the anti-reflective coating; a heavy blue haze points to a cheap single-side coating.
  5. Charge the lume with a flashlight for 30 seconds and check for even glow across hands and markers.

Step 3: Test the movement

  1. Wind the crown 30 turns and feel for grit or a spring that catches.
  2. Set the watch to a time signal and let it run 24 hours in one position.
  3. Record the rate error for that day.
  4. Put the watch on a timegrapher and confirm the beat rate matches the caliber the seller claims.
  5. Roll the wrist slow and listen for rotor scrape, which points to a rough rotor bearing.

Step 4: Check bracelet, clasp, and crown

  1. Run a fingernail along the end links where they meet the case and look for uneven gaps on each side.
  2. Unscrew one link pin and check the thread and pin finish.
  3. Open and close the clasp 20 times and check for a firm snap with no side play.
  4. Inspect the clasp engraving under the loupe; shallow laser marking is a budget sign.
  5. Screw the crown down and confirm it seats flush with the case.

Step 5: Confirm water resistance

  1. Ask a local watchmaker to pressure test the case before you wear it near water.
  2. Keep the watch out of showers and pools until that test passes, whatever number is printed on the dial.

Price tiers

  • Entry copies, about $80 to $150: low-beat movement, plated case, stamped clasp.
  • Mid tier, about $250 to $450: 28,800 vph clone movement, solid end links, sapphire with coating.
  • Top tier, about $500 to $800: correct thickness, sharper dial print, movement that has been regulated.

Red flags

  • Stock photos instead of dated photos of the actual watch.
  • No movement name, or a claim of a Swiss movement with no photo of the rotor.
  • No timegrapher shot and no video of the sweeping second hand.
  • A price far under the tier that matches the claimed specs.

Legal and practical note

US law bars selling a counterfeit watch as genuine, and customs can seize shipments of counterfeit goods. Buy only where the listing says replica in plain words. Plan for service too: IWC will not touch the watch, so an independent watchmaker handles repairs, and parts may not match the original caliber.