Quick answer
A counterfeit IWC Da Vinci IW376051 fails on three points: the movement, the caseback engraving, and the case number. The genuine Da Vinci Chronograph runs an in-house IWC chronograph movement with a 68-hour power reserve and a beat rate of 28,800 vibrations per hour. Copies run a Chinese automatic, a Swiss third-party chronograph, or quartz. Ask for photographs of the movement and the caseback before you pay.
Check the movement first
The Da Vinci Chronograph has a sapphire display back. You can see the movement without opening the watch. Look for the IWC mark, the words "Probus Scafusia", and the calibre number engraved on the rotor and bridges. IWC's own reference data names the calibre. Confirm that number for this reference before you compare. Copies reproduce the text but not the finish. Genuine IWC bridges carry Geneva stripes with sharp edges and a brushed or blasted surface between them.
fake replica da vinci iw376051
Next, study the subdials. Count them and note what each one counts. A third-party chronograph movement forces a different layout. If the subdial positions do not match IWC's specification for the reference, the watch is not genuine.
Da Vinci IW376051 Fake: The Ultimate Guide
Wind the watch until the mainspring stops. Set it down and time it. A genuine movement runs about 68 hours. A Valjoux 7750-based copy runs about 44 hours. A quartz copy stops in seconds.
Caseback and case number
Every IWC carries a case number that is unique to that watch. On the Da Vinci it sits on the caseback next to the reference number. The engraving is crisp and even.
- Reference number matches the reference you were quoted.
- Case number matches the number on the warranty card and on service records.
- Font and spacing match IWC engraving on other examples of the same reference.
- Gold references carry a precious-metal hallmark. Steel references do not.
Laser-etched copies look flat and shallow. Compare a photo of the genuine caseback side by side with the seller's photo.
Dial and hands
- Applied indices sit flat and reflect light on their polished edges.
- Printing of "IWC", "SCHAFFHAUSEN" and "SWISS MADE" is sharp. Copies show blurred or thick letters.
- The date sits centered in its window.
- Hands are polished, with no burrs and no paint bleed.
Crown, case and weight
Check the crown signature and the number of flutes. Check the case diameter against IWC's published specification for the reference. Copies miss the diameter by a millimeter or more. Weight tells you less than people think. A steel case with a copy movement weighs about the same as the real watch.
Papers, box and price
A genuine set includes a warranty card with the reference, the case number, the dealer name and the sale date. IWC can confirm a case number and its service history. Contact IWC with the number before you buy.
Price is a signal, not proof. A price far below the pre-owned market for the reference deserves an explanation. Ask for the purchase receipt and for service paperwork. Buy from a dealer that gives a return window and a written description of the watch.
What copies get right
Modern copies match the case diameter, the dial color and the strap. A watch that fits the wrist and looks correct in a photograph proves nothing. Two tests stay reliable: the movement and the case number. Both require the seller to show you the back of the watch.