A fake IWC ref. IW323720 gives itself away in four places: case finishing, dial print, caseback engraving, and the movement. The genuine watch is an Ingenieur Automatic from IWC's 2005 to 2011 generation, and it carries a sharp case flank, five flush bezel screws, crisp applied markers, and an IWC-signed automatic calibre. Most copies miss at least two of those points. Run the checks below in order and you can separate a real one from a replica in about ten minutes.

Case and bezel

  1. Set the watch under a desk lamp and tilt it until light rakes across the case flank. Genuine brushing runs straight and even from lug to lug. Replica brushing looks wavy, or shows a buffing swirl left by a polishing wheel.
  2. Run a fingernail along the edge where the brushed flank meets the polished chamfer. A genuine case breaks with a crisp line. Copies round that edge over.
  3. Inspect the five bezel screws. Each one should sit flush, at the same depth, with a clean slot. Stripped slots, uneven depth, or screws standing proud of the bezel point to a copy.
  4. Measure case diameter and thickness with calipers and compare them to the published spec. Replica cases often run a fraction thick, and the extra material shows at the lugs.

Dial and hands

  1. Use a 10x loupe on the dial text. Genuine print has hard edges and consistent stroke width. Replica print looks soft, thick, or slightly doubled.
  2. Check the applied markers. They should sit flat, align with the chapter ring, and reflect light in one clean plane. Loose or tilted markers are a common replica fault.
  3. Look at the date window. The opening should be cut sharp, with the date wheel sitting close to the dial surface. A deep, dark gap under the dial is a tell.
  4. Turn the watch over and check the hand bevels from the side. Genuine hands are polished on the bevel and flat on top. Copies often polish the whole hand.

Caseback and reference markings

  1. Look at the caseback crest and lettering under the loupe. Genuine engraving is deep, with a crisp floor. Replica engraving is shallow and washed out.
  2. Compare the reference and case numbers to the paperwork. The digits should match the font used by IWC and sit at an even depth.
  3. Check the caseback fit. It should seat flush with an even gap all the way around, with no gap at one side.

Movement

  1. Wind the crown slowly. A genuine IWC calibre winds smooth with light resistance. Grit or a hollow feel is a warning sign.
  2. Pull the crown to the time-setting position and check that the seconds hand hacks. Then check the beat rate on a timegrapher against the calibre spec.
  3. Look at the rotor engraving through the caseback. Replica rotors show shallow laser text and dull finishing on the bridges.

Paperwork and price sanity

  • A price far under the going rate for the reference is the oldest signal there is.
  • Match the warranty card, booklet, and case numbers. Replica sets often use the same serial across batches.
  • Ask for a photo of the movement with the caseback off, plus a shot of the caseback engraving in raking light.

What replica grades deliver

Top-tier replicas copy the case profile and bracelet geometry well enough to pass at arm's length. They still fall short on dial print depth, bezel screw slots, and movement finishing. Budget replicas miss the case brushing and the engraving depth, which makes them easy to catch with a loupe and a lamp. Judge the watch on the four checks above and ignore the box and the story.