Short answer

IW544737 is a reference number from IWC Schaffhausen. The IW5447 prefix belongs to IWC's Portuguese line. A fake IW544737 is a watch built by a third-party factory that copies that case, dial, and markings. Copies sell for about $120 to $900. Genuine IWC watches carry four and five figure prices on the used market. I cannot confirm a specific current catalog page for IW544737. Check IWC's own archive or an authorized dealer for the official case size, caliber, and dial options before you compare photos.

Checks on the case and dial

  • Case back: IWC engraves the reference, a case number, and the caliber. Letter height stays constant. Copies show shallow laser etching and uneven spacing.
  • Dial: the words International Watch Co. and Schaffhausen sit in fixed positions. On copies the type weight shifts or a letter leans.
  • Hands: IWC uses blued steel or rhodium. Copies use painted steel that flakes at the tip.
  • Crystal: sapphire with anti-reflective coating on both faces. Mineral glass at this price points to a copy.
  • Weight: a 42 mm steel IWC on a leather strap weighs about 90 to 110 grams. Copies run 20 to 30 grams lighter.
  • Crown: signed with the IWC probus mark. Copies use a blank crown or a soft stamp.

Movement

Have a watchmaker open the case back. Genuine IWC movements show the caliber number, the IWC name, and finishing such as Geneva stripes or perlage. Copies use a Chinese or Japanese movement with a printed rotor sticker. Wrong font size on the sticker is a common tell. A movement marked Miyota or Seagull is not an IWC movement.

Box, papers, and price

A genuine set includes a box, a warranty card, and a manual. Copies ship with printed cards and no dealer stamp. The warranty card number should match the case number. A steel IWC at a four figure price deserves a full inspection before payment.

US law and customs

Under 19 U.S.C. 1526, importing a counterfeit watch into the United States is illegal. CBP can seize and destroy the item. Selling a watch with a counterfeit IWC mark falls under 18 U.S.C. 2320. A first offense carries up to 10 years in prison and a $2,000,000 fine. A buyer who pays by wire to a private seller has no recovery path.

Verify before you pay

  1. Ask for the case number and reference from the case back.
  2. Ask for photos of the movement.
  3. Send the serial to an authorized IWC service center for a records check.
  4. Use a payment method with chargeback rights.
  5. Book a watchmaker inspection inside the return window.