A fake IW329140 is a counterfeit of a watch in the IWC Pilot's Watch Automatic 41 family. The reference sits in the IW3291 block. Genuine models use a 41 mm steel case, caliber 32111, 120 hours of power reserve, and 100 m water resistance. Fakes copy the outside and put a generic movement inside. Four checks settle most cases: the caseback engraving, the dial print, the rate of the second hand, and the papers.
What the Reference Number Covers
IWC builds reference numbers from IW plus six digits. The block IW3291 belongs to the Pilot's Watch Automatic 41. The last digits change with dial color, strap, and market. Confirm the exact variant on the IWC product page before you compare a single photo. Sellers mix photos from different dials, and reference codes get reused in listings.
Specs on a Genuine Watch
- Case: 41.0 mm stainless steel, 10 bar (100 m) water resistance
- Movement: IWC caliber 32111, automatic, 120-hour power reserve
- Crystal: sapphire, convex, antireflective coating on both faces
- Crown: screw-in, engraved
- Caseback: closed, engraved with reference and serial numbers
Caseback and Serial
Genuine engraving cuts into the metal with even depth. Letters and numbers hold the same height and spacing. Counterfeit engraving looks shallow and wide, and the strokes blur at the edges. Compare the serial on the caseback with the serial on the warranty card and the IWC registration record. Numbers that do not match point to a fake or to a swapped caseback.
Dial, Hands, and Date
Under 10x magnification the genuine print shows solid edges. The date font matches the rest of the dial. Lume sits inside the metal frames with no overflow. Counterfeit dials show thick print, a date disc with the wrong font, and lume that reads yellow or green against the genuine tone.
Rate and Movement
The caseback is closed, so the movement stays hidden. Genuine caliber 32111 beats at 28,800 vibrations per hour (4 Hz). Record the second hand in slow motion. A 21,600 vph (3 Hz) movement shows a stutter that the genuine watch does not. Crown threads on a genuine watch engage in about two turns and stop with a firm seat.
Papers, Price, and Seller
New steel models in this line list in the range of $5,500 to $6,500. Resale runs below that. A price far under market is the first signal. Ask for the box, the warranty card, and the serial. IWC service centers do not work on counterfeits and return them.
Limits of Photo Checks
Photos hide flaws. Resizing removes print detail, and light hides engraving depth. Ask for a video with the crown unscrewed and the second hand visible. Ask for a close photo of the caseback with the full serial. Send those files to an IWC boutique or an independent watchmaker who handles the brand. A repair invoice from a third party does not prove authenticity.