The top pick for a fake IW938450 is the mid-tier first copy built on a cloned automatic movement, with a case that matches the genuine profile to within a fraction of a millimeter and a sapphire crystal coated on the inside. The criteria that decide it are reference accuracy, movement type, case and crystal finishing, dial print quality, and caseback engraving. Everything below shows how to apply those criteria, whether you were offered a watch sold as genuine or you are choosing which replica version to buy.

What "fake IW938450" usually means

Two different buyers search this phrase. The first has been offered a watch described as an IWC IW938450 and wants to know if it is real. The second already knows it is a replica and wants the best-built version of it. The checks overlap, because both depend on the reference number resolving to a real model with documented proportions.

Start there. IWC reference numbers use the IW prefix followed by six digits, and the maker's own catalog is the place to confirm that a model exists, what it is called, and how big it is. A listing that fails that single step does not deserve a second look.

Top pick: mid-tier first copy with a cloned automatic movement

This is the tier where the money goes into the parts you actually touch. The case is cut to the real dimensions, the crystal has coating on the underside where it belongs, and the movement is an automatic with a sweep that matches the genuine beat rate rather than a quartz substitute hidden behind a closed caseback.

Pros

  • Case thickness and lug width taken from the real watch, so aftermarket straps and bracelets fit without modification.
  • Automatic movement with hacking seconds and a smooth sweep, which is the first thing a knowledgeable buyer checks.
  • Sapphire with inner anti-reflective coating, the single detail that separates a convincing build from a shiny one.
  • Engraved caseback with a serial format that matches the reference instead of a generic sticker.

Cons

  • Costs meaningfully more than the entry tier, and the difference is invisible in a thumbnail photo.
  • Resale value is close to zero, so treat the purchase as a cost, not an asset.
  • Availability depends on whether that specific reference is in production at the moment.

Use case: buy this tier if the watch will be worn, handled, and photographed up close. If it will sit in a drawer, the cheaper build is the rational choice.

Criterion 1: reference accuracy

Before anything else, confirm that the model exists and that the seller's photos match its published dimensions. Counterfeit listings often invent a number, transpose two digits, or attach a real reference to the wrong dial layout.

Pros of a correct reference

  • Case diameter, thickness, and lug width can be cross-checked against a published spec sheet.
  • Dial layout, subdial spacing, and date position fall where they should.
  • Bracelet and strap sizing is predictable before you pay.

Cons of a loose reference

  • An invented number means no spec sheet exists, so nothing can be verified.
  • Wrong subdial spacing is visible from across a room.
  • You inherit whatever case the factory had on hand, not the one you wanted.

Use case: this is the check for a buyer who has been offered a watch in a private sale and has one evening to decide.

Criterion 2: movement

A watch sold as an automatic should have an automatic in it. Ask for a photo of the movement through the caseback, or a short video showing the seconds hand sweeping rather than ticking. A quartz movement in a case with a display back is an instant rejection.

Pros

  • Cloned or well-finished automatic movements keep time and can be serviced by a competent watchmaker.
  • Correct beat rate gives the smooth sweep that matches the original.
  • Hacking seconds let you set the time precisely.

Cons

  • Cheap automatic movements drift and may arrive badly regulated.
  • Servicing cost can approach the price of the watch itself.
  • Water resistance claims on any replica should be treated as decorative.

Use case: essential for anyone who wears the watch daily and cares about timekeeping. Skip the movement upgrade only if the watch is purely a display piece.

Criterion 3: case, crystal, and bracelet finishing

Look at the transition between brushed and polished surfaces, the edge of the lugs, and the crown engraving. Then look at the crystal at an angle. Genuine-spec crystals disappear at oblique angles because the coating is on the inside. Cheap builds look milky or show a blue sheen from a coating applied on the outside.

Pros

  • Crisp brushing and clean polished bevels read as quality in the hand.
  • Inner anti-reflective coating makes the dial legible and the crystal vanish.
  • Screw-down crowns and correctly threaded casebacks survive normal use.

Cons

  • Sharp lug edges and shallow engraving are the most common cost cuts.
  • External coating scratches and cannot be repaired.
  • Bracelet screws that strip on first resize are a frequent complaint.

Use case: the deciding criterion for a buyer who handles watches and will notice edges and reflections within a minute of strapping one on.

Criterion 4: dial print and hands

Macro photos settle this. Applied indices should have clean edges and sit level. Print should be sharp under magnification, not fuzzy at the borders. Lume on the hands and the dial should match in tone under the same light.

Pros

  • Sharp print and level indices hold up in close-up photos.
  • Matched lume tone avoids the two-tone glow that gives replicas away at night.
  • Correct hand length and shape keep the proportions believable.

Cons

  • Thick print and domed indices look wrong at arm's length in daylight.
  • Mismatched lume is obvious after a few minutes in the dark.
  • Flat, painted dials lose depth and read as plastic.

Use case: the check for a buyer who plans to photograph the watch or who spends time around people who own the real thing.

Criterion 5: caseback engraving and serials

Engraving depth should be consistent across the text, and the serial format should follow the conventions of the reference. Watch for the same serial appearing in two different listings, which means a stock photo is being reused.

Pros

  • Deep, even engraving with a serial that matches the reference family.
  • Correct caseback style, whether solid or display, for that model.
  • Clear, recent photos of the actual unit rather than a catalog image.

Cons

  • Shallow laser etching with a grey, washed-out finish.
  • Protective stickers left on in every photo, which hides the caseback.
  • Repeated serials across multiple listings.

Use case: the fastest way to screen a seller before you commit, since it takes one photo request.

Red flags that end the conversation

  1. No macro photos of the dial, crown, and caseback.
  2. A refusal to show the movement or a video of the seconds hand.
  3. Claims of Swiss origin for a watch at a price that cannot support one.
  4. Stock images that do not match the described reference.
  5. No return window, or returns accepted only for store credit.

Which build fits which buyer

Daily wear: the mid-tier automatic, since the movement, crystal, and case finishing all affect how the watch lives on your wrist.

Occasional wear and photography: the same tier, with extra attention to dial print and hand shape, because those are what the camera sees.

First replica or a gift for someone curious: the entry tier is defensible, provided you accept a quartz movement and an externally coated crystal.

A note on US law before you buy

Trafficking in counterfeit goods is illegal in the United States, and border authorities seize shipments of trademark-infringing watches on arrival. Replicas sold openly as replicas sit in a different category from a watch passed off as genuine, but the import risk is real. Read the seller's terms before paying, and keep the transaction record.