Quick Answer

The IWC Pilot's Watch Mark XVIII, often searched as the "Mark 18," is a 40 mm time-and-date watch produced from 2016 to 2022 with calibre 35111 inside. Replicas of it miss small, measurable details: case thickness, the size and position of the date window, the weight of the dial printing, and the depth of the case back engraving. Calipers and a 10x loupe settle most questions in about five minutes.

fake pilots watch mark 18 longtail

What You Need

  • Digital calipers that read to 0.01 mm
  • A 10x jeweler's loupe
  • Bright, diffused light, ideally a desk lamp with a diffuser
  • Reference photos of the exact reference number you are checking, such as IW327001 with the black dial or IW327004 with the blue Le Petit Prince dial

Step-by-Step Inspection

  1. Measure the case diameter across the bezel from the 9 o'clock side to the 3 o'clock side. A genuine Mark XVIII measures 40.0 mm; most replicas run 40.5 mm to 41.5 mm.
  2. Measure case thickness from the crystal to the back of the case. Genuine is about 11 mm. Replicas commonly reach 12.5 mm or more because of a thicker movement spacer and rotor.
  3. Measure the distance between the inner faces of the lugs. Genuine is 20 mm, and a strap or bracelet that fits a replica often will not fit a real one.
  4. Unscrew the crown and count the positions. Genuine calibre 35111 gives winding, then date, then time. Check the fluting on the crown for even, sharp cuts; replica crowns have shallow, rounded grooves.
  5. Put the loupe on the dial text at 12 o'clock. Genuine reads IWC with SCHAFFHAUSEN below it, both printed in thin, crisp type. No Mark XVIII text appears on the dial itself.
  6. Check the word AUTOMATIC above the date at 3 o'clock. It sits centered over the aperture and matches the weight of the text at 12.
  7. Examine the triangle and two dots at 12 o'clock. The triangle points down, the dots sit level with each other, and the lume fills the shape flush with the print.
  8. Inspect the lume color in daylight. Genuine lume is white. Replicas often look cream, yellow-green, or unevenly applied with thick edges.
  9. Look at the date window. The aperture should be centered on 3 o'clock, cut cleanly, with a black date ring and white numerals in a matching typeface. Wider windows and grey date wheels are common replica faults.
  10. Study the hands. They are rhodium plated and thin. The seconds hand has a short tail and carries no lume; replicas often add a lume dot or a heavier counterweight.
  11. Tilt the watch under the lamp to check the crystal coating. Genuine sapphire has anti-reflective coating on both faces, which shows a faint blue tint at an angle. Purple tints or no tint at all point to a replacement crystal.
  12. Turn the watch over and read the case back. Genuine engraving is deep, sharp, and even, with the reference number and movement data cut into the steel. Replica backs usually show a shallow grey laser etch.
  13. Check the strap and buckle. Genuine leather straps carry clean edge stitching and a signed buckle with a crisp strike. Blurred stamping is a warning sign.

Reference Numbers and Dates

The Mark XVIII line ran from 2016 to 2022, when the Mark XX replaced it. A seller offering a "new old stock" Mark XVIII with a 2024 or later date card is selling a replica. Reference numbers are stamped on the case back and should match the dial color and strap configuration of the listing.

Fake Pilots Watch Mark 18 Review: Replica IWC Mark XVIII Tiers Compared

Listing Red Flags

  • A price far below the current used market for a steel Mark XVIII
  • Phrases like "1:1 Swiss made" or "mirror quality"
  • Photos that avoid the date window, the crown, or the case back
  • A seller who will not send a close-up of the dial text or a measurement photo
  • No reference number visible on the back of the case
  • Lume photos taken under strong UV light, which hide color errors