The short answer: a counterfeit IW93820 almost never fails on one dramatic detail. It fails on the match between paperwork, case engraving, dial execution, and movement finishing. The most reliable order of checks is paperwork first, then caseback engraving, then dial and crystal, then movement, with a documented service inspection at an authorized IWC center as the deciding vote. Everything below assumes you have the watch in hand or have high-resolution photos of the caseback, dial, and movement.
Check One: Reference and Serial Consistency
Modern IWC references carry the IW prefix followed by digits, and the same reference should appear on the caseback, the warranty card or booklet, and the invoice or listing. The serial is a separate number and should be unique to that watch. Two documents that disagree, or a serial you can find repeated across several listings, is the single most common failure point on replica IWC pieces.
- Works well because: numbers are cheap to copy but hard to keep consistent across a caseback, a card, and a movement.
- Works well because: a repeated serial across multiple listings is easy to confirm with a search before you pay.
- Limit: paperwork can be forged convincingly, so consistency alone never proves a watch is authentic.
- Limit: older or serviced watches may have replaced cards, so gaps are not automatic proof of a fake.
Best for: remote buys, where photos and documents are all you have before shipping.
Top Guide to Finding Replica Watches Online: Makers Online
Check Two: Caseback Engraving and Case Finishing
Look at how the text is cut, not just what it says. Factory engraving on IWC cases is typically crisp, evenly spaced, and cut into the metal with clean edges. Counterfeit engraving often looks lasered, with shallow depth, slightly rounded letter edges, or inconsistent spacing between characters. Check the caseback seams, the lug finishing, and the crown threads as well, since replica cases tend to show tool marks and uneven brushing that a factory case does not.
- Works well because: engraving depth and edge quality are expensive to replicate at scale.
- Works well because: case finishing is visible in ordinary macro photos, no tools required.
- Limit: a genuine watch that has been polished can lose engraving sharpness and look suspicious.
- Limit: high-end replicas have closed much of this gap, so treat it as one signal among several.
Best for: in-person viewings and detailed photo sets from a seller.
Check Three: Dial, Hands, and Crystal
Under magnification, examine the applied markers, the printing weight, and the alignment of the date or subdial. Replica dials usually show thicker printing, markers that sit slightly proud or unevenly, and hands with rougher edges or flat finishing. The crystal is worth a separate look: factory sapphire is typically clear at an angle and carries an anti-reflective treatment that reduces glare rather than producing a mirror-like sheen.
- Works well because: dial printing and marker setting are hand-level details a replica factory must cut corners on.
- Works well because: a loupe or a phone macro lens is enough to check.
- Limit: aftermarket dials and hands on real watches create false positives.
- Limit: lighting in photos can disguise printing weight and AR coating.
Best for: confirming a suspicion raised by the paperwork or case checks.
Check Four: Movement Finish and Rotor Engraving
Open the caseback only if you can do it without marking the watch, or ask the seller for movement photos. Factory finishing shows consistent Geneva stripes or perlage, beveled bridges, and engraving on the rotor that matches the reference and caliber. Replica movements often show uneven striping, unfinished edges under the bridges, and rotor text with the wrong font weight or spacing.
- Works well because: movement finishing is the most expensive element to counterfeit properly.
- Works well because: caliber and reference should agree, and mismatches are decisive.
- Limit: opening a case yourself can void service coverage and leave marks.
- Limit: some replica makers fit modified third-party movements that look correct at a glance.
Best for: high-value transactions where the seller will supply movement photos.
Check Five: Weight, Box, and Accessories
Weight, strap hardware, box printing, and booklet paper quality are the weakest signals on their own, because packaging is the easiest part of a counterfeit package to buy or borrow. Use them only to support or contradict the checks above.
- Works well because: a case that feels light for its size supports other red flags.
- Limit: boxes and papers are sold separately and are frequently genuine on a fake watch.
- Limit: feel is subjective and varies with bracelet or strap configuration.
Best for: a final sanity check, never a standalone verdict.
Getting a Definitive Answer
If two or more checks fail, walk away. If the watch is expensive and the checks are mixed, pay for a documented authentication: an authorized IWC service center can inspect the movement, confirm the reference and serial against factory records, and issue paperwork you can rely on. Sellers who resist an inspection, or who push for payment before one, are telling you something. Buyers who already suspect a counterfeit should stop wearing the watch, keep all correspondence and payment records, and report the sale to the platform and to customs if the item crossed a border, since counterfeit goods are illegal to import and are subject to seizure.
Best for: any purchase where the price is high enough that being wrong would hurt.