Short answer
A fake IW376002 is a copy of the IWC Da Vinci Automatic, a Swiss watch made by IWC Schaffhausen. The copy comes from a replica workshop. IWC does not make it, service it or warrant it. Three checks answer most questions: the caseback engraving, the movement under the caseback and the print on the dial.
What reference IW376002 is
IWC reference numbers start with "IW" and run to six digits. IW376002 sits in the Da Vinci Automatic series sold in the late 2000s. Photos of that series show a barrel-shaped case with a rounded profile and lugs cut into the case. The watch runs on an IWC automatic calibre with a Pellaton winding system. Compare any listing to photos in IWC's model archive before you bid.
Two things follow. A barrel case with a third-party movement is a copy. A round case sold as IW376002 does not match the reference photos and needs an explanation.
Check 1: caseback numbers
The caseback carries the reference number and a serial number. On genuine watches the engraving sits in a clean recess. Letters have sharp inner corners and even depth. On copies the mark looks shallow, the font drifts and the same serial shows up on several listings. Ask for the serial in advance. Then check that it matches the number on the movement and on the warranty card.
Check 2: movement
Ask for a photo of the movement with the caseback removed, or a service invoice from an IWC service center. Genuine calibres show striped bridges, a signed rotor, blued screws and a named shock absorber. Copies show a stock movement, often an ETA or Seagull base, with a rotor stamp that copies the logo but not the finish. A timegrapher photo helps. Rate and amplitude should match IWC's spec for the calibre. A reading of 21,600 beats per hour on a watch sold as an IWC in-house calibre is a stop sign.
Check 3: dial, hands and case
Look at the print under 10x. Genuine dial text has crisp edges and consistent stroke weight. Copy text thickens at the curves. Applied markers sit level, with sharp polished facets. Hands show beveled edges and no tool marks at the center. The date should sit square in the aperture, with even gaps on all four sides. Case finishing on genuine watches puts brushed flanks against polished bevels. Copies blur that line.
Price and paperwork
A steel Da Vinci Automatic trades on the secondary market inside a known range. A price far under that range is the first sign of a copy. Ask for the box, warranty card, booklet and original invoice. A missing card is not proof of a fake, but it lowers the price and it removes the serial check.
What "first copy" means
Replica sellers use "first copy", "mirror copy" and "AAA" as grade labels. The labels come from the sellers, not from IWC. No watch body certifies them. A first copy can look correct at arm's length and still fail a loupe check on dial print or movement finish. Ask which movement the copy uses and get that answer in writing.
Steps before payment
- Request a macro photo of the caseback and the serial.
- Request a movement photo or a service record.
- Request a video that shows the seconds hand and a full time set.
- Request a timegrapher photo with rate and amplitude.
- Pay with a method that can be reversed.
No photo set replaces a hands-on check. A watchmaker can open the case in minutes and confirm the calibre, the case metal and the dial origin.