Short answer
A fake IW544773 is a copy of a hand-wound IWC Portuguese, and the hand-wound part is exactly why these replicas are harder to get right than a Datejust clone. The case, dial, and strap on a good copy can look close in photos. The movement cannot. Anyone selling you one should be able to show a running movement through the caseback, not a stock shot of a catalog page.
If a listing shows a date window or a chronograph under that reference, the reference number is wrong. Time-only, small seconds at 9, no date. That is your first filter.
Why the movement decides everything
IWC's hand-wound Portuguese calibers are thin, finished, and built in-house. Most copies run a Chinese hand-wound or a stripped automatic with the rotor pulled, then hide it behind a decorated plate. From two feet away you will not notice. Through a sapphire caseback at arm's length you will.
Look for three things:
- Engraving depth. Real engraving cuts into the metal. Printed text sits on top and reads flat under angled light.
- Jewel count and position against the reference. If the seller cannot tell you the caliber number, they do not know what they are selling.
- Winding feel. A decent hand-wound movement has resistance through the whole turn. Gritty, loose, or silent winding is a tell.
Dial and case details
Applied numerals should sit proud of the dial with crisp, polished edges. Replicas often use glued-on markers that sit slightly crooked, and the lume fill spills past the edge. Check the printing with a loupe or a phone macro shot. "Schaffhausen" and "Swiss Made" should be sharp and evenly spaced.
On the case, the polished bezel should meet a brushed case band at a clean line. Polished lugs on a case that should be brushed is common on cheaper tiers, and it is the fastest visual giveaway in daylight. Crown engraving on copies is shallower and often sits slightly off center.
What to ask before you pay
- A timestamped photo or video of the actual watch, not a catalog image.
- A clear macro of the dial printing and the caseback engraving.
- Movement photos with the caseback off, if the seller will provide them.
- Strap and buckle details. Stitching, keeper shape, and buckle engraving get cut first at lower price points.
- A written return window. Anything sold as final sale is a coin flip.
Price, service, and the part sellers skip
High-grade copies of this reference tend to land between roughly $250 and $500, and anything under about $150 is usually a lower tier with a stamped dial and a rough movement. Above $600 you are paying for a story.
Two things to keep in mind. IWC will not service or authenticate a counterfeit, so repairs go to an independent watchmaker, and some will refuse the job once they open it. And in the US, imported counterfeits are subject to seizure by customs, which means the money and the watch can both disappear. Resale value is effectively zero. Buy it as a wearable, not as an asset.
Bottom line
The IW544773 copy that holds up is the one with a movement you can see running and a dial that survives a macro lens. Everything else is packaging. Ask for photos, ask for the caliber, and walk away from sellers who only have catalog renders to show.