Quick answer
A replica IW323773 is a copy of an IWC Ingenieur reference, and the good ones are judged on four things: case diameter measured in millimeters, movement type and beat rate, dial print quality, and bracelet fit. Photos alone tell you almost nothing. Before you pay, ask for a caliper shot of the case, a short video of the running movement, and a macro close-up of the date window. If a seller refuses any of the three, walk away.
Prerequisites
- A digital caliper (a cheap one is fine)
- A 10x loupe or a phone macro lens
- A timegrapher readout, or a seller willing to provide one
- The original reference spec sheet, so you have real numbers to compare against
Step-by-step evaluation
- Look up the manufacturer spec for the reference and write down case diameter, case thickness, lug width, and crystal type.
- Ask the seller for a photo of the case with calipers on it, one dimension per photo.
- Compare those numbers to your list. A 1 mm difference is visible on the wrist.
- Request a 10 second video with the watch running so you can watch the seconds hand.
- Ask for a timegrapher photo showing rate, amplitude, and beat error.
- Ask for a macro shot of the dial at an angle, not straight on.
- Ask for a photo of the date window with the date set to a wide numeral such as 28.
- Ask for a side profile shot of the bracelet end links meeting the lugs.
- Ask what the return window is and who pays return shipping.
- Pay through a method with buyer protection, never by wire.
Movement
A clone automatic that beats at 28,800 vibrations per hour, which is 8 beats per second, matches the smooth sweep of the original. A quartz movement or a low beat 21,600 movement gives the watch away to anyone who knows the reference. Ask which factory movement sits inside and what the beat rate is. A vague answer is your answer.
Dial and date
Check date alignment inside the window, the height of the applied markers, and whether the printing sits flat against the dial. On a replica, the date wheel is the first place corners get cut. It may sit high, sit left, or use a numeral that is a touch too bold. Compare the same date on the original in a reference photo.
Case and finishing
Brushed surfaces should run in one direction and polished bevels should be crisp, not rounded off. Run a fingernail along the case edge. A sharp transition means the case was finished after machining. A soft, rolled edge usually means it was not.
Bracelet and clasp
Check end link fit against the lugs. Gaps wider than a fraction of a millimeter look wrong at arm's length. The clasp should close with a single click and sit flush with the bracelet when shut. Ask for the number of removable links in the box.
Water resistance
Do not swim with a replica until a watchmaker pressure tests it. Gaskets are often dry, undersized, or missing. ISO 22810 defines the ratings a genuine dive watch is tested to. A replica has not been tested to any of them, whatever the caseback says.
Price tiers and red flags
- Under roughly 100 dollars: quartz or a throwaway automatic, wrong case size.
- Mid tier: correct dimensions, entry automatic, dial print is close but not sharp.
- Top tier: clone automatic, sapphire crystal, matched bracelet, real QC photos.
- Red flag: no caliper photo, no timegrapher, pressure to pay fast, prices far below the tier norm.
Legal note
Counterfeit watches are illegal to import and to sell in the United States, and a replica carrying a trademark cannot legally be labeled Swiss Made under Swiss labeling rules. Treat the purchase as a personal risk decision, not a resale plan.