Short answer
IW544746 is a reference number in the IWC catalog. A fake IW544746 is a watch made by a third party that copies the case, dial, hands, and caseback markings tied to that number. IWC's own records are the source of truth for what the reference names. Replica listing pages copy the string from each other and cite no source.
How IWC reference numbers work
IWC writes references as IW plus six digits. The digits split into two blocks. The first block names a model family. The last three digits name a case, dial, and strap combination. IWC adds a suffix for revisions. A seller who writes 544746 has copied the string, not the watch. Confirm the model on IWC's site or with an authorized dealer before you compare a copy to an original.
What a China-made copy contains
- Case: 316L steel or brass with plating. Diameter measured with calipers, often 0.5 mm to 1 mm off the original.
- Crystal: mineral glass on low tiers, sapphire on higher tiers. Anti-reflective coating on one side.
- Movement: quartz, a Chinese automatic at 21,600 vph, or a modified clone at 28,800 vph.
- Dial: pad-printed text. Logo edges show under 10x magnification.
- Caseback: laser engraving. Cut depth is shallow next to a stamped or milled original.
- Strap: leather with a glued lining, or a steel bracelet with folded end links.
Checks before payment
- Ask for photos of the watch next to a dated card.
- Ask for a video of the seconds hand and the movement rate.
- Ask for the case diameter and lug width in millimeters.
- Ask what the seller does if customs holds the parcel.
- Pay by a method with a chargeback path. Wire transfers leave no recourse.
Price tiers
Listings for IWC copies sit between about $70 and $500. The $70 to $150 tier carries quartz or a low-grade automatic, mineral glass, and a plated case. The $250 to $500 tier claims sapphire, a 28,800 vph movement, and a steel case. No published audit tests those claims. A used original IWC costs more and keeps resale value.
US import and legal risk
Counterfeit goods are illegal to import into the United States. CBP can seize a parcel and destroy it. 18 U.S.C. 2320 covers trafficking in counterfeit goods, which applies to resale and not to a single personal purchase. Sellers split orders into two or three parcels to lower the chance of a full seizure. A seized parcel leaves the buyer with no refund.
What a copy lacks
No IWC warranty. No service from IWC. No parts network. A watchmaker may refuse the job, or charge more because parts match no catalog. Water resistance is unverified unless a shop pressure-tests the case. Resale value is near zero.