The IWC Da Vinci reference IW376026 is a chronograph that counterfeiters copy. A fake shows itself in three places: the chronograph subdials, the caseback engraving, and the movement inside. Check those three before you pay.
What the reference is
IW376026 sits in IWC's Da Vinci line, the chronograph branch of the family. Reference numbers in the 3760 group cover several Da Vinci chronograph variants with different dials, straps, and case metals. Published spec sheets for the exact number IW376026 are thin. Confirm case size, case metal, and dial color with IWC or a dealer before you compare a watch to photos online.
Movement: the fastest tell
Real Da Vinci chronographs from this period use IWC's in-house caliber 89360. That movement has one combined totalizer at 12 o'clock that counts chronograph minutes and hours on the same dial. It also has a flyback function.
Most fakes use a modified ETA/Valjoux 7750 or a Chinese copy of it. The 7750 layout gives running seconds at 9 o'clock, a 30-minute counter at 12, and a 12-hour counter at 6. That is a layout the IWC movement does not use.
Two tests you can run without opening the watch:
- Start the chronograph, then press the lower pusher while it runs. A flyback movement resets to zero and keeps running in one press. A 7750 stops and needs the pusher again to restart.
- Watch the small seconds hand. The 89360 runs at 28,800 vibrations per hour, eight ticks per second. A 7750 runs at 21,600, six ticks per second. The slower beat looks choppier up close.
Case and caseback
- Edges. Real cases have crisp transitions between brushed and polished surfaces. Fakes show rounded edges and uneven brushing.
- Weight. Steel Da Vinci chronographs feel substantial. Plated brass or zinc fakes feel light in the hand for the size.
- Engraving. The caseback carries the IWC name, the reference number, a serial number, and the motto Probus Scafusia. Fake engraving is shallow, uneven, or has letter spacing errors.
- Numbers. The serial on the caseback should match the serial in the paperwork. Ask the seller for both.
Dial, hands, crystal
- Applied indices on a real dial sit flat and reflect light in one plane. Glued-on indices on a fake sit crooked.
- Printing is sharp under a loupe. Fake dials show bleeding at the edges of text.
- The date sits centered in its window and changes close to midnight. Fakes sit off-center or sit low in the aperture.
- The sapphire crystal has anti-reflective coating. A fake often uses mineral glass with no coating, which reflects more light and scratches.
Price check
Pre-owned steel IWC Da Vinci chronographs list in the four-figure US dollar range on the secondary market. Prices move with condition, box, and papers. A listing at a fraction of that range is a replica, a fake, or a watch with a replaced movement. Sellers who describe a watch as a replica are selling a counterfeit, not an IWC.
Before you buy
- Ask for photos of the caseback, the crown side, and the chronograph running.
- Ask the seller to film the flyback test.
- Get the serial number and check it against the papers.
- Have an independent watchmaker open the case and identify the movement.
- Pay with a method that allows a chargeback if the watch fails inspection.
No photo set proves a watch is genuine. A movement inspection does.