A fake Pilot's Watch Mark 18 is a copy of the IWC Pilot's Watch Mark XVIII. IWC released the Mark XVIII in 2016 as the replacement for the Mark XVII. The genuine watch has a 40 mm steel case, an 11 mm profile, a 20 mm lug width, and the IWC caliber 35111. Replicas copy the outside. The differences show in the movement, the date font, the case back, and the weight.

Genuine Mark XVIII specs

  • Case: stainless steel, 40 mm across, 11 mm thick.
  • Lug width: 20 mm.
  • Water resistance: 6 bar (60 m).
  • Movement: IWC caliber 35111, Sellita SW300-1 base, 25 jewels, 28,800 vph, 42-hour power reserve.
  • Crystal: sapphire, anti-reflective coating on both faces.
  • Dial: black or blue, white printed numerals, date at 3 o'clock.
  • Retail price: about $4,000 to $5,000 USD, set by strap or bracelet.

Checks that expose most replicas

  1. Measure the case. Many copies run 41 mm wide or 12 mm thick.
  2. Weigh the head. A genuine steel head on leather sits near 60 g to 70 g. Copies on low-grade steel run lighter or heavier.
  3. Read the date. Genuine date font is thin and flat. Replica date wheels use a wider, rounder font.
  4. Turn the crown. Genuine 35111 winds with light resistance. Replica 2824 and Miyota 9015 movements feel rough.
  5. Check the case back. Genuine engraving has sharp edges and a plane motif. Replica engraving is shallow.

Movement

IWC builds the 35111 on the Sellita SW300-1. The rotor carries Geneva stripes, perlage sits on the plates, and "PROBUS SCAFUSIA" is engraved on the bridge. Most replicas use an Asian ETA 2824 clone or a Miyota 9015. Those movements are 11.5 lignes and 3.6 mm thick, so the case back sits taller. A replica case back often stands 0.5 mm to 1 mm above the lugs.

Dial, hands, and lume

The Mark XVIII dial carries "IWC" above "SCHAFFHAUSEN" at 12 o'clock. Print edges on a genuine dial are sharp under a 10x loupe. Replica print bleeds at the edges of the numerals. The hands are rhodium plated with Super-LumiNova. Replica lume glows green or weak blue and fades in 30 minutes. Genuine lume holds a readable glow for hours. Note the Mark XVII had three date windows. The Mark XVIII has one. A "Mark 18" with a triple date is a different watch or a fantasy build.

Crystal and case

Genuine sapphire has anti-reflective coating on both faces. A blue or purple sheen shows at an angle. Many replicas coat one face or none, so the dial washes out in daylight. Case finishing is another tell. Genuine brushed flats and polished bevels meet at crisp lines. Replica cases show rounded bevels and uneven brushing.

Mark XVIII and Mark XX

IWC replaced the Mark XVIII with the Mark XX in 2022. The Mark XX keeps the 40 mm case and moves to caliber 32111 with a 120-hour power reserve. Sellers mix the names. Ask for the reference number. Mark XVIII references start with IW3270.

Buying notes

Price sets the odds. A new Mark XVIII sold for about $4,150 USD in 2016. A sealed "new" Mark XVIII at $600 is not genuine. Replica Mark XVIII watches sell from $100 to $600. Ask for service papers, the original box, and a movement photo. A serial number check with IWC confirms the case and the year of production.