Quick answer
A "fake Da Vinci IW376028 v10" is a replica of an IWC Da Vinci chronograph. The "v10" tag is a seller batch label. IWC does not use version numbers in its references. The reference format is IW plus six digits.
This guide could not match IW376028 to a published IWC catalog entry. Treat that gap as a warning sign and confirm the number with IWC before you pay.
Check the reference number first
Ask the seller for a straight-on photo of the caseback. IWC engraves the reference and the serial on the back. Compare that number to the IWC reference lookup and to a service record if one exists. A number that returns no result, or one that belongs to a different model, ends the deal.
Movement
Documented Da Vinci chronographs from the 2007 generation run caliber 89360. That caliber puts chronograph hours and minutes on one counter at 12 o'clock and small seconds at 6 o'clock. Two counters. Not three.
Replicas break this. A Valjoux 7750 base shows subdials at 12, 6 and 9. A quartz replica has a jumping seconds hand and no smooth sweep. Ask for a video with the chronograph started and stopped. Watch the reset. The hands should snap back to zero as a set.
Case and dial tells
- Case profile: replica midcases run thick at the lugs. The crown guards look blunt.
- Engraving: IWC stamps are deep with sharp edges. Laser engraving is shallow and flat.
- Dial print: loupe the "IWC" and "Schaffhausen" text. Replica print shows soft edges and uneven spacing.
- Indices: applied, polished on the sides. Replicas glue them low or use printed markers.
- Crystal: sapphire with an antireflective coating. Mineral glass shows a blue or purple cast at an angle.
- Weight: a steel Da Vinci has heft. Replicas run light when the movement is quartz.
Price and paperwork
A genuine chronograph sells for thousands of US dollars on the secondary market. A listing at 5 to 10 percent of that number is a replica. Boxes and papers get copied too. Papers alone prove nothing.
Questions for the seller
- What is the full reference and serial?
- Can you photograph the movement through the display back?
- What is the service history?
- Do you accept a return after an independent inspection?
What to do next
Take the watch to a watchmaker with an IWC parts account. Ask for a movement photo, a timing check and a case measurement. That inspection costs less than a bad purchase.