Short answer
A replica IW329113 is a copy of the IWC Aquatimer Automatic 42, the stainless steel dive watch with an outer bezel that drives an inner rotating dive scale. The better Chinese-made versions run about $250 to $500 and look convincing at arm's length. What they usually miss is the feel of the bezel mechanism, the case flank finishing, and the movement under the caseback. If you want a good-looking diver for daily wear and photos, a mid-tier replica covers it. If you want the bezel to click and turn the way the real one does, it will not.
What the genuine reference is
The Aquatimer Automatic 42 is IWC's core dive model: 42mm steel case, roughly 14mm thick, screw-down crown, 300m water resistance, and a unidirectional external bezel linked to an internal dive scale through what IWC calls the SafeDive system. Depending on the production year, you get either the 30120 calibre or the newer 32111, which is the one with the long power reserve. Dials are matte black or blue with applied indices, and the hands are broad and easy to read underwater. The whole design reads as tool watch first, jewelry second, which is exactly why it copies so well.
What the good replicas get right
- Overall silhouette. A 42mm case with the right lug curve sits on the wrist almost identically to the original.
- Dial layout. Index positions, date window placement, and the text blocks are close on the top factories.
- Lume. Modern replicas use decent Super-LumiNova-style paint. It glows, though usually less long than the real thing.
- Caseback engraving. Reference numbers, depth rating text, and the IWC wordmark are usually crisp.
Where they fall down
The bezel is the giveaway. On the genuine watch, the outer ring and inner scale move together with a firm, damped action. On most replicas the two halves feel disconnected, the rotation is looser, and the ratchet is louder than it should be. Second, case finishing. Real IWC alternates brushed and polished surfaces with sharp, clean transitions. Replicas often round those edges off or leave tool marks near the lugs. Third, crown action. Threading feels gritty on cheap builds and the crown guards are sometimes a hair thick.
Movement tiers
There are three common options. The cheapest builds use a basic 21-jewel automatic that keeps time but feels rough when you wind it. The middle tier uses a clone of a Swiss automatic, usually a 2824-style movement, which is smoother and easier to service. The top tier uses a decorated movement with a rotor meant to mimic the IWC calibre, and honestly that only matters if you plan to show the back to people, which is a strange hobby. For a watch like this, the middle tier is the sensible buy.
Water resistance: take this seriously
Never assume a replica is waterproof just because the real reference is rated to 300m. Factory seals are inconsistent, caseback gaskets are sometimes missing or dry, and crown threads may not seal properly. If you plan to swim, have a watchmaker pressure test it first. Most people I know who own these treat them as splash-resistant at best, and that is the honest expectation to carry in.
What I check before paying
- Ask for a short video of the bezel turning, not just still photos.
- Look at the lug brushing in raking light. Flat, even grain is good. Swirl marks mean rushed finishing.
- Check that the date flips cleanly at midnight rather than drifting for two hours.
- Confirm the case diameter with calipers if the seller will show it. Advertised 42mm sometimes means 43.5mm.
- Ask which movement is inside, and whether parts for it are still available.
Price reality
Expect around $120 to $180 for entry-level builds, $250 to $350 for good mid-tier, and $450 and up for the top factories. Above that, you are paying for a name, not a better watch. Compare that to the genuine reference, which trades in the low four figures on the used market depending on box and papers, and the value math is obvious for anyone who is not chasing an investment.
Bottom line
A replica IW329113 is a look-alike diver, not a dive watch. Buy it for the shape, the dial, and the way it wears, and set your expectations there. Check the bezel, the movement, and the finishing before money changes hands, and get it pressure tested if it will ever touch water.