Quick Answer
A fake IW376014 gives itself away in the movement bay and the engraving, not on the sales page. The genuine Da Vinci Chronograph ref. 3764 family runs a 43 mm steel case, an in-house caliber 89360 flyback chronograph with roughly 68 hours of power reserve, and a sapphire display back. If the watch in front of you has a closed caseback, a generic decorated rotor, or pushers that grind, it is a copy.
What the Real Reference Should Show
- 43 mm stainless steel case with a polished and brushed mix that follows the case line
- Caliber 89360, automatic, flyback chronograph, twin register layout, date at 6 o'clock area
- Sapphire crystal front and back, both with anti-reflective coating on the inside
- Dial printing that sits flat and crisp, with no ink bleed into the subdial rings
- Caseback reference number and case serial engraved in a consistent font depth
Before You Start
You need a loupe or a phone macro lens, a caliper or a ruler, a kitchen scale accurate to one gram, and daylight or a bright desk lamp. Ask the seller for a face-on photo, a caseback photo, a movement photo, and a video of the chronograph running. Anything less is not enough to judge a four-figure purchase.
How to Check It Step by Step
- Write down the reference number the seller quotes, then compare it to the reference stamped on the caseback. A mismatch ends the deal.
- Measure the case across the widest point without the crown. A genuine IW376014 sits at about 43 mm. Copies often land at 41 mm or 45 mm.
- Weigh the watch on its strap. Steel Da Vinci chronographs fall in a tight range. A copy with a plated brass case feels light and hollow in the hand.
- Put the loupe on the caseback engraving. Factory laser engraving has clean edges and even depth. Fake engraving looks sandy, shallow, or uneven between letters.
- Study the dial at an angle. Check that the printed logo sits level, the subdial rings align with their hands, and the date font matches the rest of the dial text.
- Press the top pusher to start the chronograph, then press it again to stop and the bottom pusher to reset. Genuine 89360 pushers move with short, even travel and reset to a hard zero.
- Flip the watch over and watch the balance through the display back. You should see a smooth, high-frequency oscillation and finishing on the bridges, not a plain rotor with printed text.
- Check the crown for a sharp engraving and a firm click when you pull it to the date-setting position. Loose or wobbly crowns point to a cheap stem and tube.
- Compare the strap or bracelet hardware against the reference. Stitching density, tang shape, and clasp stamping should all match the period of the watch.
- Have a watchmaker open the back and confirm the caliber, or send the serial to an IWC boutique for verification before money changes hands.
Red Flags That End the Conversation
- Seller refuses a movement photo or a video of the chronograph running
- Price sits far below the market range for the reference with no explanation
- Papers list a reference that does not match the caseback
- Caseback is solid steel on a reference that should have a display back
- Serial number is stamped crooked, duplicated, or missing entirely
The Bottom Line
Verify the caliber first, the caseback engraving second, and the paperwork third. Any one of those three checks will separate a genuine Da Vinci IW376014 from a copy. If the seller blocks a single step on this list, walk away and keep your money.