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IW327011 is the IWC Pilot's Watch Mark XVIII in the Le Petit Prince edition: a 40 mm steel case, a blue sunburst dial, and IWC calibre 35111. IWC stopped production around 2022, when the Mark XX replaced the Mark XVIII. Genuine examples trade on the secondary market for roughly $3,500 to $4,500 USD.

Replica versions sell for $80 to $600. The top tier copies the case shape and the blue dial with some accuracy. None of them match the movement, the caseback engraving depth, or the crown thread.

What the genuine reference contains

  • Case: stainless steel, 40.0 mm diameter, about 10.8 mm thick, 20 mm lug width.
  • Dial: blue sunburst, white printed numerals, luminescent hands and hour markers, date at 3 o'clock.
  • Crystal: sapphire, antireflective coating on both faces.
  • Movement: IWC calibre 35111, automatic, 28,800 vph, about 42 hours of power reserve. The base is a Sellita SW300-1.
  • Water resistance: 6 bar per IWC data.
  • Caseback: solid steel, engraved with the Le Petit Prince figure.
  • Magnetic protection: soft-iron inner case.

IWC lists the 6 bar rating for the standard Mark XVIII. Confirm it against the papers of any specific watch before you rely on it.

Replica tiers in the market

Tier 1, $80 to $150

Quartz or low-grade automatic movement. Printed dial markers. Mineral glass. Date wheel font is wrong. Caseback is stamped, not engraved.

Tier 2, $200 to $350

Asian clone of the 2824 or 2892. Sapphire glass, coating quality varies. Case finishing is close at arm's length. Date alignment is off on many units.

Tier 3, $400 to $600

Sold as a super clone. Movement is a decorated SW300-type copy. Caseback engraving has depth. Dial sunburst reads close to the original under indoor light. This tier carries the most risk of a bad sample, so ask for photos of the actual unit.

Measurements to request before payment

  1. Case diameter with a caliper. Expect 40.0 mm, plus or minus 0.2 mm.
  2. Thickness. Expect 10.8 mm. A 12 mm reading means a different case.
  3. Lug width. Expect 20 mm.
  4. Timegrapher printout: rate, amplitude, beat error.
  5. Date flip photo taken at 23:58 and 00:02.
  6. Lume shot after 30 seconds under a lamp.
  7. Caseback photo under raking light to show engraving depth.
  8. Movement photo with the caseback removed, if the seller allows it.

Tells that separate the tiers

  • Dial print. The genuine text is thin and sharp. Copies show thick strokes and bleed at the edges.
  • Sunburst. Genuine finish shifts from dark navy to mid blue across a narrow angle. Cheap copies look flat.
  • Date window. The cut edge should be clean and the frame thin.
  • Hands. Genuine hands have a slight curve and clean lume fill. Copies show lume over the metal edge.
  • Crown. Threads should engage in under one turn and feel smooth.
  • Rotor. A loud rotor on a wrist shake points to a low-grade movement or a dry bearing.

Water and service

Do not trust a factory water resistance claim. Gaskets on replicas are unknown parts. Have the case pressure tested before any contact with water, or keep the watch dry. Service is a problem: replica movements take clone parts, not Sellita parts. Many watchmakers decline the work. Ask about service access before you buy.

What no replica matches

Movement finishing, engraving crispness, bracelet and strap tolerance, coating performance, and parts supply over ten years. If those four items matter, buy a used Mark XVIII with papers. If the case shape and blue dial matter more than the internals, a tier 3 replica covers that goal at about one tenth of the price.