Short answer
IW323791 is an IWC reference from the Aquatimer line, the brand's dive watch family. Replica versions of this reference sell in three build levels: quartz, entry automatic, and a decorated automatic tier that sellers call 1:1. Case diameter, bezel rotation, and date font are the three checks that separate the levels. No replica matches the depth rating printed on the dial.
What the reference is
IWC lists the Aquatimer as its dive line. Aquatimer cases use stainless steel or titanium, a rotating bezel, and a screw-down crown. Strap options include rubber and steel. Confirm the case size, movement, and dial text for IW323791 against IWC's own product data. The number covers one case, dial, and strap combination, not the whole family.
What replica makers copy
- Case profile. Measure with calipers. The listed diameter often differs from the measured diameter by 0.5 mm or more.
- Bezel. Count the clicks and check for backlash. A 60-click bezel with tight tolerance costs more to build than a friction ring.
- Dial. Check date font, date window position, and index height under a loupe.
- Crown. Screw-down threads should engage in 2 to 3 turns with no grinding.
- Movement. Ask for a photo with the caseback open. Quartz and automatic look identical from the front.
- Weight. A steel replica runs 15 to 25 grams lighter than the original, from a thinner caseback and lighter links.
Price tiers in the US market
- $50 to $120: quartz, mineral glass, printed dial.
- $150 to $350: automatic movement in the Seiko NH35 or Miyota 8215 class, sapphire option, better bezel.
- $400 and up: decorated or clone automatic, sapphire, closer case finishing.
Prices move with supply. Treat any range as a starting point.
Checks before you buy
- Ask for a movement photo with the caseback open.
- Ask for a caliper photo of case diameter and lug width.
- Ask for a video of the bezel turning from 12 to 3 o'clock. Listen for scraping.
- Get the return window in writing.
- Ignore depth claims. Gaskets on replicas are not tested to ISO 6425.
Limits
A replica is a look-alike, not the watch. Water resistance is the largest gap. Original dive watches are pressure tested at 125 percent of the rated depth. Replicas at these prices get a gasket and a claim. Do not swim with one. Resale value sits near zero, and US customs can seize counterfeit goods on import.
Care
Keep the crown screwed down. Rinse the case with fresh water after contact with salt water or sweat. Replace gaskets every 2 years on a daily wear watch. Automatic replicas with unregulated movements can gain or lose 20 to 40 seconds a day.