Short answer
A counterfeit IW327012 fails on details the genuine watch passes. Check case size, crown, dial print, lume, crystal coating, movement, and caseback engraving. One mismatch proves little. Three or more mismatches mean the watch is not genuine. Measurements and inside-the-case details carry more weight than any single photo.
Reference facts for IW327012
IW327012 is an IWC Pilot's Watch Mark XVIII reference from the Le Petit Prince line. The IWC data sheet gives these points:
- Case: stainless steel, 40 mm diameter, about 11 mm tall
- Lug width: 20 mm
- Dial: blue, sunray finish, date window at 3 o'clock
- Crystal: sapphire with anti-reflective coating on both faces
- Movement: caliber 35111, automatic, 25 jewels
- Frequency: 28,800 vibrations per hour
- Power reserve: 42 hours
- Water resistance: 6 bar
Strap and bracelet versions sit under separate reference codes. Ask the seller for the full reference before you compare prices.
Case and crown
Measure the case with calipers. A 40 mm case that reads 42 mm or 38 mm is a copy built on a different blank. Confirm the 20 mm lug width. Check the crown: IWC Pilot crowns on the Mark XVIII are plain steel on many examples, so a crown stamped with a fish or a logo is a warning sign, not proof. The crown must screw down against the case tube and seal to 6 bar. Look at the spring bars. Genuine bars sit flush against the lugs and take firm pressure to remove.
Dial, hands, and crystal
Genuine print is thin and even. Study the IWC mark at 12 and the SCHAFFHAUSEN and AUTOMATIC lines below it. Copies show thick strokes, uneven spacing, and blurred edges. Lume sits flat on the hands and numerals with a clean border. The date numbers sit centered in the aperture, and the font matches IWC's block style. A date wheel with off-center numbers, a bold font, or a white background on a blue dial is wrong.
The crystal is sapphire with coating on both sides. Tilt the watch under a lamp. Genuine glass shows a faint blue or purple sheen and little reflection. Plain mineral glass throws a strong white glare. Mineral also scratches where sapphire does not. Do not scratch a watch you do not own.
Movement
Caliber 35111 is based on the Sellita SW300-1. Ask a watchmaker to open the caseback and photograph the movement. Check the rotor engraving, the jewel count, and the finish on the bridges. A printed rotor plate over a plain blank is a common fake. Test the beat rate with a timegrapher. Genuine runs at 28,800 vibrations per hour, which is 4 Hz. Wind the watch and let it rest. Genuine keeps running past 40 hours; a copy with a low-grade movement stops in half that time.
Caseback and numbers
The Mark XVIII Le Petit Prince caseback carries an engraved Le Petit Prince motif plus the reference and case numbers. Genuine engraving has sharp edges and consistent depth. Laser copies look shallow and gray. Write down the case number and the reference. Compare both against the warranty card, the box label, and any service papers. Copies of boxes, booklets, and cards exist, so paperwork alone does not prove the watch.
Price
Retail for this reference sits in the mid four figures in US dollars. That figure moves with the market, so confirm current pricing with IWC or a dealer. A listing at a small fraction of retail is a replica. Sellers of genuine watches name the reference, the year, the service history, and the case number in the listing.
Verification steps
- Get the case number and reference from the caseback.
- Compare both numbers with the warranty card and service records.
- Have a watchmaker open the case and photograph caliber 35111.
- Ask an authorized IWC service center to inspect the watch.
- Check the case diameter and lug width with calipers.
What is unknown
IWC does not publish production counts for IW327012. No public database maps a case number to a sale date. A dial photo cannot confirm a movement. Treat any single claim of proof with caution.