Short answer
A fake IWC Da Vinci IW376003 is a counterfeit of the Da Vinci Automatic ref. IW376003, a steel watch from the Da Vinci line that IWC sold in the late 2000s. Copies sell for $150 to $400. Genuine pre-owned examples sell for about $3,000 to $4,500. The gap shows in case finishing, dial print, the crown, the caseback engraving, and the movement. No replica carries an IWC movement.
What ref. IW376003 is
IW376003 belongs to the Da Vinci Automatic family. Published listings describe a round steel case in the 35 to 36 mm range, a sapphire crystal, a date window at 3 o'clock, and a leather strap. The movement is reported as IWC calibre 30130, an automatic with a 42-hour power reserve. Sources differ on small points such as dial color options and lug width. Check any spec against IWC service records for the serial number before you pay.
Where fakes fail
- Case finish. Genuine cases show sharp breaks between polished and satin surfaces. Fakes show rounded edges and polish that spills onto brushed areas.
- Dial print. The IWC wordmark and the Da Vinci text sit in crisp relief on the real dial. Fake print looks thick and soft at the edges.
- Indexes and hands. Applied markers on a genuine dial sit flush. Loose markers, uneven lume, and hands that sit too high point to a copy. Shapes vary by version, so compare photos of the same reference.
- Crown. Genuine crowns carry the IWC Probus Scafusia mark. Fake crowns show a shallow stamp or a plain cap.
- Caseback. Engraving on a real caseback cuts clean lines and even depth. Fake engraving looks sandblasted and shallow. The reference number and serial belong to a real watch, so check the serial with IWC.
- Strap and buckle. Genuine tang buckles carry a signed mark. Fake buckles are lighter and the pin fits loose.
Movement check
Ask for a photo of the movement or a service invoice. Genuine calibre 30130 shows Geneva stripes, a signed rotor, and blued screws. Many copies use an Asian clone of the ETA 2892 or a quartz module behind a solid caseback. A movement photo that shows no signing, rough perlage, or a glued rotor is a fake. A watchmaker can open the case in minutes.
Papers and price
A genuine watch comes with a warranty booklet, a card with the serial, and a box. Papers alone do not prove a watch is real, since sellers pair fake watches with reprinted booklets. Price is the faster test. A seller who offers an IWC for $300 is selling a counterfeit. Ask for the serial, the service history, and a return policy in writing.
Legal status in the US
US law treats trafficking in counterfeit goods as a crime under 18 U.S.C. § 2320. US Customs and Border Protection can seize counterfeit watches at the border. Selling a fake as a genuine IWC is trademark infringement and fraud.
Bottom line
Buy the seller first. A serial check with IWC, a movement photo, and a price near market value remove most of the risk. A fake can copy the shape. It does not copy the movement or the paperwork trail.