What "fake IW93857" usually means
People search this term for one of two reasons. Either they own a watch stamped IW93857 and want to know whether it is genuine, or they saw the code in a listing and want to know which model it points to. The short answer: IW93857 does not appear in current IWC Schaffhausen catalogues. Most IWC references follow an IW prefix with six digits, such as IW371446 or IW500705. A five-digit string like IW93857 sits outside that pattern, so treat it as a prompt to verify rather than a model name you can look up.
A watch can be genuine and still carry a reference you cannot find online. Older pieces, regional variants, and short production runs sometimes use codes that never reach public catalogues. What separates a real watch from a counterfeit is the physical evidence on the case, dial, and movement, not the number of search results for its reference.
Before you start
- Clear photos of the caseback, dial, crown, and clasp
- A photo of the movement or an open caseback view
- The reference and serial number as engraved, not as typed in the advert
- Any box, warranty card, or service paperwork that came with the watch
- A jeweller's scale accurate to 0.1 g and a loupe or macro lens
How to check a watch marked IW93857
- Photograph the caseback under bright light and read the reference and serial digits one at a time.
- Compare the reference format against IWC's published patterns, which use an IW prefix plus six digits on current models.
- Measure the case diameter with calipers and match it to the closest IWC family in that size.
- Weigh the watch head on a 0.1 g scale and compare it with the published weight for the same model in steel or gold.
- Inspect the dial printing with a loupe and look for uneven letter spacing, ink bleed, and mismatched font weight.
- Check the date window for square alignment and confirm the date wheel font matches the rest of the dial.
- Examine the crown and pushers for thread pitch, engraving depth, and surface finish.
- Open the caseback or request a movement photo and confirm the calibre number, rotor engraving, and jewel count.
- Look at the crystal from an angle for anti-reflective coating on both faces and note the colour cast.
- Verify the bracelet end links, spring bar fit, and clasp engraving against the case number.
- Cross-check the paperwork so the serial on the card matches the caseback and the card carries a dealer stamp.
- Ask a watchmaker to run the movement on a timing machine and confirm the beat rate and amplitude match the calibre spec.
Red flags that point to a counterfeit
- Reference or serial digits stamped with a laser dot pattern instead of cut engraving
- Serial numbers that repeat across two watches you have seen for sale
- Dial text that sits off centre or uses a heavier stroke on one word
- Movement finishing that shows tool marks, uneven perlage, or painted jewels
- Weight that falls more than a few grams below the published figure for the model
- Water resistance claims that cannot be traced to a tested rating
What replica grades actually describe
Sellers use terms such as 1:1 replica and first copy to describe how close a copy comes to the original in case size, dial layout, and movement type. These labels are marketing language, not standards. A copy can match a genuine watch in diameter and still differ in lug shape, crown thread, crystal coating, and bracelet taper. If you buy a replica, judge it on the specifications you can measure, and never represent it as genuine at resale.
If the reference stays unverified
Ask the seller for the original purchase receipt or a service record with the same serial. Contact an authorised IWC service centre and give them the reference, serial, and case measurements. If neither step produces a match, treat the watch as unverified and price it accordingly. Buyers who skip this step often pay genuine prices for a watch that no service centre will touch.