Short answer
A fake IW323710 is any watch offered as IWC reference IW323710 that did not come from IWC Schaffhausen. The reference belongs to the Pilot's Watch Mark XVII family: a 41 mm stainless steel pilot watch with the Calibre 30110 automatic movement and the three-window date display that separates the Mark XVII from earlier Marks. Copies are common because the design is clean and easy to machine. The tells cluster in four places: the date aperture, the caseback engraving, the movement, and the paperwork.
Reference facts to confirm first
- Case: stainless steel, 41 mm across, about 11 mm thick, brushed top surfaces with polished flanks.
- Movement: Calibre 30110, automatic, 28,800 vph, roughly 42 hours of power reserve, built on an ETA 2892-A2 base.
- Date: one aperture at 3 o'clock showing three consecutive dates, with the current date centered.
- Crystal: sapphire with anti-reflective coating on both faces.
- Water resistance: 6 bar.
- Magnetic protection: soft iron inner case around the movement.
If the watch in front of you misses two or more of those points, stop the inspection there.
What you need before you inspect
- A 10x jeweler's loupe
- Digital calipers
- A phone with macro focus and a steady light source
- A reference photo of a documented IW323710 for side-by-side comparison
- Permission to open the caseback, or high-resolution movement photos from the seller
How to check an IW323710 for authenticity
- Measure case width, thickness, and lug width with calipers. Genuine Mark XVII cases land at 41 mm and about 11 mm thick, while many replicas run 42 to 43 mm and sit taller because the case is built around a thicker clone movement.
- Put the loupe on the date aperture. The window should be a rounded rectangle with three printed dates, even spacing, crisp edges, and the current date centered; fakes show oversized windows, blurred print, or dates that drift off-center.
- Examine the dial printing and hands. Indexes sit flat, lume fills are level, and the hands have sharp edges with no burrs or uneven polish.
- Study the caseback engraving. Genuine cuts have depth and consistent letter spacing, while laser-etched replicas look shallow, gray, and slightly fuzzy at the edges.
- Check the crown and winding feel. Threads should engage smoothly and the crown should sit flush against the case; gritty threads and a wobbly crown point to a copied case.
- Photograph the movement. Rotor engraving, perlage, and striped finishing on a Calibre 30110 are finer than on an ETA 2824 clone, and a Miyota or Seagull rotor is an immediate fail.
- Compare the reference and serial numbers against any service paperwork, box documents, or dealer records. Numbers that do not match across documents kill the deal.
- Run the watch for 48 hours and note the rate. A healthy 30110 holds steady time; large daily deviation with a weak power reserve suggests a cheap movement swap.
- Check the asking price against current market listings for the same reference. A price far below the going rate for a steel Mark XVII is the oldest red flag there is.
Price and paperwork signals
Genuine IW323710 examples trade in a narrow band, and discontinued pilot models hold value well. Sellers who cannot show a service history, who ship without the original box, or who push a bank transfer to avoid fees are usually moving counterfeit stock. A printed certificate printed on home paper proves nothing; an invoice from an authorized service center does.
Where replica IW323710 listings show up
Most fakes pass through classified ads, social media groups, and small marketplace accounts with short histories. Listings with stock photos, a refusal to send macro shots of the caseback, and urgency language such as "today only" are worth skipping. Ask for a short video of the watch running with a date change visible, since the triple-date mechanism is the hardest feature for a copier to fake.
Bottom line
Authenticate in this order: size, date window, dial, caseback, movement, paperwork, price. Any single mismatch can be a repair part; three mismatches mean you are looking at a replica IW323710, not a Mark XVII.