A fake Da Vinci IW376045 usually fails on three things: the movement architecture, the caseback engraving, and the dial printing. Genuine IWC Da Vinci watches use in-house or heavily reworked movements with finishing that quartz and generic automatic copies cannot reproduce, and the caseback markings are cut deep and aligned with the reference number. If a seller cannot show a running watch, clear movement photos, and matching reference and serial engravings, treat it as a counterfeit until you can prove otherwise.
Start with the reference, not the watch
Before you judge a single detail, confirm what IW376045 is supposed to look like. The Da Vinci line spans three-hand automatics, chronographs, and perpetual calendars, and each version has its own dial layout, case size, and movement. The reference number tells you which one you are looking at, so pull the official spec list or a clean photo from a reputable dealer and write down the basics first.
- Case diameter and thickness, measured without the crown
- Dial layout: subdial positions, date window placement, index style
- Movement family and whether the caseback is solid or sapphire
- Strap or bracelet type and the correct clasp style
A watch that looks good but does not match the published layout for IW376045 is already a red flag, no matter how sharp the photos are.
Movement: the hardest part to copy
This is where most fakes fall apart. IWC chronograph calibres from this era are built around a combined hour and minute counter, with running seconds on a separate subdial. Cheap copies use third-party chronograph movements, so the counters behave differently, the pusher feel is gritty or mushy, and the reset does not snap back cleanly to zero.
Through a display back, look for even perlage on the plates, crisp Geneva stripes, blued screws that sit flush, and a rotor engraving with clean letter edges. Copies show shallow stamping, uneven polishing, and rotor text that looks slightly blurred under a loupe. If the caseback is solid, ask for a short video of the chronograph starting, stopping, and resetting before you commit.
Dial, hands and printing
Print quality separates genuine from fake more often than people expect. On an original Da Vinci, the brand text, the reference details, and the minute track are printed with sharp, uniform strokes. Fakes show thickened letters, uneven spacing, and a date wheel with the wrong font or misaligned numerals.
- Applied indices should have polished facets that catch light in a clean line
- Hands should be evenly finished with no burrs or flat spots on the tips
- Subdial rings should be perfectly concentric with no overlap at the edges
- Lume plots should sit inside the index, not spill past it
Case, crystal and caseback
Sapphire crystal with anti-reflective coating on both faces is standard on genuine examples. Under a light, the dial should stay readable with only a faint blue or purple tint at steep angles. Cheap mineral glass shows heavy reflections and scratches easily.
Caseback engraving is the second big tell. Genuine markings are cut with consistent depth, and the reference and serial numbers match the paperwork and the movement. Fakes often use shallow etching, wrong font weights, or a serial that repeats across multiple listings.
Crown, pushers, strap and clasp
The crown should be signed, screw down smoothly, and align flush with the case once tightened. Pushers should have short, crisp travel. On the strap side, check stitch density, edge finishing, and the engraving on the clasp or buckle. Soft, uneven stitching and shallow clasp stamps point to a copy.
Serial numbers, papers and price
Price is the loudest signal of all. A Da Vinci offered far below the current secondary market range is either damaged, stolen, or fake. Be careful with stock photos, sellers who refuse a video call, and listings that show box and papers but never the caseback.
How replica grades compare
Replicas range from basic quartz models to high-end automatic copies. Even the best of them miss the small things: engraving depth, movement decoration, crystal coating, and the exact snap of a chronograph reset. The real risk is not owning a replica, it is paying genuine money for one. Always verify before you transfer funds.
Pre-purchase checklist
- Confirm the reference layout and specs from an official source
- Request photos of the caseback, movement, and clasp
- Ask for a video of the running movement and chronograph reset
- Compare the serial and reference numbers across the watch and papers
- Compare the asking price against real sold listings
- Have a watchmaker open the case before the return window closes
What to do if you already bought a fake
Stop wearing the watch and keep it untouched. Save the listing, chat logs, and payment records, then request a refund in writing. If the seller refuses, open a dispute with the platform or your payment provider, and get a written opinion from an independent watchmaker to support your claim.