Short answer
IW327010 is the reference for the IWC Pilot's Watch Mark XVIII "Le Petit Prince": 40 mm steel case, blue dial, automatic calibre 35111. A fake IW327010 is any watch carrying that reference that IWC did not make. That covers everything from a $50 mall knockoff to a $450 replica that looks close to right on a wrist. What separates them is rarely the shape of the case. It is the movement, the dial print, the crystal coating and the caseback engraving.
The specs you are comparing against
- 40 mm stainless steel case, about 11 mm thick, 20 mm lug width
- Blue dial with white printed numerals and applied indices
- Calibre 35111, a Sellita SW300-1 base, 28,800 vph, roughly 42 hours of reserve
- Sapphire crystal with anti-reflective coating on both faces
- Caseback engraved with the Little Prince artwork and the reference
- Rated to 50 m, with a soft-iron inner case listed by IWC
Match photos against the same production year when you compare. IWC changed small things like strap options and date disc details across the run, so a difference you spot may just be a different batch.
Where a fake IW327010 falls apart
The movement
This is the first thing I check. A genuine 35111 is a decorated Sellita with Geneva stripes, blued screws and an IWC-signed rotor. Cheap fakes hide a basic Miyota or a low-grade Chinese automatic under a rotor stamped IWC and nothing else. Good replicas often use a real SW300-1 or a close clone, and the seller should be able to tell you which.
Dial print and lume
On the real thing the print is sharp enough to read under a loupe, the applied markers have polished edges, and the lume glows evenly across hands and dial. Fakes show fuzzy text, markers that sit slightly high or low, and lume that fades at a different rate on the hands than on the dial.
Crystal and coating
Genuine double-sided AR coating gives the sapphire a faint blue or violet flush at an angle, and the dial stays deep and readable. Single-sided or uncoated fakes look milky when you tilt them toward a window. It is an easy tell in daylight.
Caseback engraving
Look at the depth and crispness of the Little Prince figure and the lettering around it. Laser-etched fakes are shallow and slightly soft at the edges. The reference and serial stamping should be even and consistent in depth.
Case and bracelet finish
Brushed surfaces should run one direction, with polished chamfers that catch light in a clean line. On fakes the brushing wanders, edges feel sharp, and bracelet links show visible gaps or a clasp stamp that looks pressed rather than engraved.
Questions to ask before you buy
- What movement is inside, and is it a real Sellita or a clone?
- Are the photos of the actual watch I will receive?
- Has the case been pressure tested, and to what rating?
- What is the return window if the watch does not match the listing?
- Is the strap or bracelet the same spec as the reference?
Setting realistic expectations
A good replica IW327010 will look right at arm's length, keep time within a few seconds a day, and last years if you treat it well. It will not pass a pressure test to 50 m, the finishing under a loupe is a step behind, and it has no resale value. Buy it as a watch to wear. Keep it out of the pool, wipe the case with a soft cloth after wear, and budget for a service every few years if you want it to keep running clean.