The short answer

The single most decisive check on a fake IW544724 is the caseback engraving matched against the manufacturer's own published reference data. Counterfeiters copy a dial photo well and a caseback badly. Everything below is ranked by how much weight that check should carry: reference and serial engraving first, then movement finishing, dial printing under magnification, case and crown geometry, and finally paperwork and seller behavior, which describe the transaction rather than the watch.

Criterion 1: Reference and serial engraving

Genuine IWC casebacks carry the reference number, the serial, and the model line cut into the metal with a consistent character depth. Ask for a macro photo taken in raking light, at an angle, so the cut casts a shadow you can read.

Pros

  • Crisp character edges with visible depth on every digit.
  • Spacing and font weight stay consistent across the whole string.
  • Serial and reference placement match the layout published for that reference.

Cons

  • Shallow, flat-looking text usually means laser etching on a polished blank.
  • Uneven gaps between digits, or a font that drifts halfway through the number.
  • Sellers who only send straight-on dial photos are avoiding the caseback for a reason.

Criterion 2: Movement and finishing

If the reference has an exhibition back, the movement is the hardest thing to fake at low cost. Look for striped or circular grained bridges, blued or polished screws, jewel settings seated flush, and a rotor that moves without scraping.

Pros

  • Finishing visible under the bridges, not just on the surface you first see.
  • Seconds hand sweeps at a mechanical beat rather than ticking once per second.
  • Rotor spins quietly and settles without a metallic ring.

Cons

  • Bright chrome plating with no grain underneath.
  • A plastic movement ring or visible glue holding the movement in place.
  • Engraving on the rotor in a different font from the caseback.

Criterion 3: Dial, hands, and crystal

Use a 10x loupe or a phone macro lens. Printing on a genuine dial sits sharp and level; counterfeits show ink bleed at the edges of small text and indices that sit a fraction off center.

Pros

  • Applied markers with clean polished bevels and even lume fill.
  • Date wheel font and alignment matching the dial, with no tilt in the window.
  • Crystal with an anti-reflective treatment that reads slightly blue or purple at an angle.

Cons

  • Fuzzy or thickened small text under magnification.
  • Lume applied unevenly, or a marker sitting off the minute track.
  • Flat, uncoated glass that flares under a lamp.

Criterion 4: Case, crown, and lugs

Proportions are where replica cases drift. Measure the case, check lug width against the stated specification, and look at how the crown seats against the case tube.

Pros

  • Case thickness and lug width match the published specification for the reference.
  • Crown engraved cleanly and threads smoothly by hand.
  • Polished and brushed surfaces separated by a sharp, deliberate line.

Cons

  • A case that feels noticeably thicker or lighter than the stated specification.
  • Crown that wobbles on the stem or grinds when you set the time.
  • Blurred transition between brushed and polished surfaces.

Criterion 5: Papers, price, and seller

Cards and boxes are copied too, so they support a conclusion rather than create one. What matters is whether the seller invites independent verification.

Pros

  • A seller who agrees to a check at a watchmaker or service point before money changes hands.
  • Serial on the card matching the caseback and the movement.
  • A price that sits inside the normal range for the reference and condition.

Cons

  • A price far below market, framed as a distressed sale or an estate find.
  • Pressure to pay off-platform or to skip inspection.
  • Photos reused from other listings, which you can confirm with a reverse image search.

Which check to lean on

If you can handle the watch in person, lead with the movement and the dial under magnification, because those are the two areas a low-cost counterfeit cannot reproduce. If you are buying remotely, lead with the caseback engraving plus a seller who accepts an independent inspection, and walk away from anyone who will not. Keep in mind that offering a counterfeit as genuine is fraud in the United States and most other markets, so a seller who misrepresents the watch is a legal risk as well as a financial one.