The short answer: judge a cloned IW938998 listing by its movement and its measured dimensions, not by claims of 1:1 or super clone. Ask the seller for three things before you send money: the exact caliber inside, caliper readings of case diameter and thickness, and timestamped QC photos under magnification. A seller who supplies all three is running a real operation. A seller who supplies none is reselling stock photos. Everything else in the listing matters less. Read the legal section below before you commit.
What the reference string actually covers
The string does not map cleanly to one watch. Sellers attach it to IWC Pilot's Watch chronographs, and the IW389xxx block in the catalog charts mostly to the larger 44.5 mm Top Gun generation in ceramic and titanium, while similar-looking 41 mm and 43 mm references sit in other blocks. Two listings using the same code can therefore describe different diameters, dial layouts, and movements. Before you compare offers, pull the seller's stated diameter, case material, dial color, and subdial layout, then check those numbers against the manufacturer's own specification page for that reference. If the seller cannot name the watch they copied, you are buying a generic pilot chronograph with a familiar logo, not a clone of a specific model.
What to look for
Movement first
Most automatic clones in this family run a Chinese Valjoux 7750 derivative, sold as A7750. It is a proven design with known weak points: the chronograph mechanism and rotor bearings wear under hard use. Seagull ST19 manual movements appear in thinner builds and feel smoother to operate but need regular winding. Quartz versions are the least interesting and the most reliable if you want the look without service worries. Ask which movement is fitted, ask for a photo of the movement through the caseback, and confirm the balance and chronograph layout match the description.
Duplicate IW389998: What That Watch Reference Really Means
Case, crystal, and finishing
Measure, do not trust. Case thickness is the most reliable visual tell on a chronograph clone, because the movement stack plus spacer adds height. Genuine pilot chronographs in this size range sit around 15 to 16.5 mm. Builds that come in at 17 mm or more look slab-sided on the wrist. Check lug width, crown and pusher threading, and whether caseback engraving is laser-etched or stamped. Ceramic cases cannot be polished, so a chip is permanent.
Dial, hands, and lume
Inspect printing under 10x magnification. Genuine dials show tight edges on raised indices and even lume fill. Clones show thick paint, uneven gaps around the date window, and hands sitting too high above the dial. On the 69000-series layout the chronograph minutes counter sits at 12 and running seconds at 6. If a listing shows those swapped, the dial was not patterned on the real watch.
Chronograph function test
Before you accept delivery, or in a video from the seller, start, stop, and reset the chronograph at least ten times. The reset should snap to zero without hesitation, the pushers should feel firm through the full travel, and the sweep hand should not stutter. Builds that grind on reset need service right away.
Seller checks
Demand timestamped QC photos of the actual unit rather than catalog renders. Get a return window in writing, check that the seller has a track record longer than a few months, and use a payment method with some recourse. Walk away from anyone who accepts irreversible transfers only or refuses to show the movement.
Parameter bands worth memorizing
- Case diameter: 41 to 44.8 mm depending on the sub-reference; confirm with calipers
- Case thickness: 15 to 16.5 mm on the genuine; past 17 mm is a giveaway
- Lug width: 21 to 22 mm
- Crystal: domed sapphire with double anti-reflective coating on the genuine; mineral glass or single-side coating on budget builds
- Water resistance: rated 60 m on most genuine references; treat any clone rating as unverified until pressure tested
- Power reserve: about 46 hours on the in-house caliber; roughly 38 to 45 hours on an A7750
- Subdials: chronograph minutes at 12, running seconds at 6 on the 69000-series layout
Pitfalls
- The terms 1:1 and super clone are marketing words, not grades. No certification body stands behind them.
- Stock photos. If the images match a dozen other listings, they are not the watch you will receive.
- Irreversible payment. Once the money leaves, a seized parcel or a dead movement is your loss.
- Water damage. Untested seals fail, so keep it out of pools and showers.
- Service cost. An A7750 overhaul at an independent watchmaker can rival the price of the watch.
- Ceramic cases chip and cannot be refinished, so buy those only with detailed photos of every edge.
Legal and practical risk
Counterfeit watches infringe registered trademarks, and trafficking in counterfeit goods is a federal crime in the United States under 18 U.S.C. section 2320. Imported parcels are subject to inspection and seizure by U.S. Customs and Border Protection, and a seizure notice usually means the money and the watch are both gone. Resale is where legal exposure grows, so treat any purchase as a personal item with no resale path and no manufacturer support. If you want the pilot chronograph look with a service network behind it, save for a used example or pick a homage brand that does not copy logos.
FAQ
Is a cloned IW938998 safe to swim with?
No. Assume splash resistance only. Gaskets on clones are rarely pressure tested, and one session in a pool can end the watch.
Which movement should I choose?
Quartz for low maintenance, Seagull ST19 for a manual wind with a smooth chronograph, A7750 if you want an automatic and accept the service cost. Avoid unbranded automatic chronographs with no stated caliber.
Will anyone mistake it for the real thing?
At arm's length, possibly. Under inspection, no. Caseback engraving, movement finishing, and crystal reflections give it away quickly.
Can a local watchmaker service it?
Many independents will work on an A7750, but parts availability varies and some refuse counterfeit work outright. Ask before you buy.
What should I check when the parcel arrives?
Photograph the unopened box, then test the chronograph cycle, crown action, dial printing, and case thickness against the listing before you wear it.