If you are checking a fake IW93850, the single most useful check is the movement, followed by the caseback engraving, the dial print and the crown and pusher action. Those four criteria settle most questions, because a factory can copy a dial photo but has a much harder time matching the beat rate, the finish and the engraving depth of the real thing. The sections below explain what the reference number means, how each check works, and the trade-offs of the three routes people take when they want this style of watch on the wrist.

What the IW93850 reference is

IWC reference numbers carry an IW prefix and a block of digits, and the blocks map to families such as Pilot's, Portugieser, Portofino, Aquatimer and Ingenieur. IW93850 does not sit inside the blocks that appear in the brand's published current range, so any watch sold under that number deserves a hard look. In practice a listing with an unmatched number falls into one of three buckets: a fantasy reference invented by a factory, a genuine reference with a digit misread or mistyped, or a replica of a discontinued model with a re-engraved caseback. None of those is automatically a bad watch, but each one changes what you should pay and what you should expect if you ever need service.

Criterion 1: Caseback engraving and serial

Look at engraving depth, letter spacing and how the reference and case number line up with the centre of the caseback. A factory stamp tends to be shallow and slightly uneven, and the font is often a touch too wide. A genuine caseback is cut with consistent depth and clean edges. The giveaway that matters most is repetition: if two different sellers show the same case number, you are looking at a batch, not two watches.

Criterion 2: Movement (the top pick)

Ask for the caseback to be opened, or at least for a clear photo of the movement. Then check the beat rate against the spec for the model the watch claims to be, check that the date changes cleanly, and check how the crown winds and how the rotor spins. A decorated base movement, where brand text is engraved on a rotor sitting over a generic calibre, is the common pattern in replica IW93850 watches. Judge the finish of the bridges and the jewel count, not the words on the rotor.

Criterion 3: Dial, hands and crystal

  • Print: crisp edges on the brand text, no smudging under a loupe.
  • Indices: applied markers evenly set, with the same gap on every side of the dial.
  • Lume: even colour across hands and markers, no patchiness.
  • Crystal: anti-reflective coating that reads blue or clear, never milky, with no halo at the edge.

Criterion 4: Crown, pushers and case finishing

Wind the crown slowly. Threads should engage without grit, and a chronograph pusher should click and return with a short, firm travel. Follow the brushing across the lugs: it should run one direction and stop at a polished bevel, with no swirl marks cutting across it. A soft crown tube and washed-out bevels are the two things that show up fastest in the hand.

Option 1: A high-grade replica

These are the pieces marketed as super clones, built with a decorated automatic movement, sapphire crystal and a case machined to closely follow a catalogued design.

  • Pros: close visual match, sapphire and decent finishing, easier to source parts for a service.
  • Cons: higher cost, no manufacturer warranty, resale value near zero, and customs risk on cross-border shipping.

Best for: someone who wants the look for daily wear and accepts that the watch is not an investment.

Option 2: A budget replica

  • Pros: low entry price, easy to replace, good for testing whether you enjoy the size and style.
  • Cons: mineral glass, plated finishes that wear through, rough crown threads, and movements that often run fast or stop.

Best for: a short-term try-out, not a keeper.

Option 3: A genuine IWC on a catalogued reference

  • Pros: documented serial, serviceable movement, real resale market, no legal exposure at the border.
  • Cons: far higher price, waiting lists on popular models, and service costs that scale with the calibre.

Best for: a buyer who wants one watch to keep for a decade and pass on.

Red flags to walk away from

  1. The same case number appears in more than one listing.
  2. Seller refuses a movement photo or a caseback shot.
  3. Reference number is engraved on a smooth, unmarked caseback plate that does not match the case shape.
  4. Price sits far below every other example of the same model.
  5. No return window, and payment only by irreversible transfer.

If you already own one

Have a watchmaker time it on a machine before you spend on anything else. If the rate is far off, a regulation or a movement swap costs less than a repair. Keep the purchase receipt for customs purposes, and if you ever sell it, describe it as a replica in plain words. Misrepresenting a fake IW93850 as genuine is the point where a hobby turns into a legal problem.

Bottom line

Judge the movement first, then the engraving, then the dial and the crown. If the movement is a decorated generic calibre and the case number repeats across listings, you have your answer, whatever the dial says.