Short answer
A replica IWC IW329087 is a copy of IWC's Aquatimer Automatic dive watch, and quality varies more than the photos suggest. Judge a copy on four things: case proportions, dial printing, the inner rotating bezel, and how the movement behaves over a week. Boxes, paperwork, and stock images tell you nothing. A good copy matches the original's 42 mm case, the two-tone bezel scale, the applied markers, and the screw-down crown. A weak copy misses the bezel knurling, uses flat white paint instead of applied indices, and runs a movement that loses minutes a day.
Prerequisites
- Reference photos of the genuine IW329087 from at least three angles
- Digital calipers
- A 10x loupe
- A kitchen scale that reads in grams
- A budget range set before you shop, so you compare tiers instead of talking yourself up a price
Know what the original does
The IW329087 sits in IWC's Aquatimer line, a steel diver with an internal rotating bezel operated by a second crown at 2 o'clock. Confirm current dimensions, water resistance rating, and caliber number on IWC's own reference page before you compare a replica, since the brand updates specs without changing the look. The details that matter on the wrist are the case height, the bezel click, the marker geometry, and the way the bracelet or rubber strap meets the lugs.
Inspection steps
- Measure the case diameter, thickness, and lug width with calipers. Anything more than half a millimeter off in thickness changes how the watch sits.
- Rotate the inner bezel through a full turn. It should index with clean clicks and no backlash, and the triangle should line up with 12 o'clock.
- Examine the dial under the loupe. Check that indices are applied metal with lume filled level, not printed, and that the date sits centered in its window.
- Work the crown and the bezel crown through ten full cycles. Threads should catch on the first turn and feel smooth, not gritty.
- Weigh the watch head. A steel diver in this size class lands in a narrow range, and a copy that feels light usually has a thin case or a plated alloy.
- Set the watch to a reference clock and check the drift after 24 hours, then again after seven days.
- Charge the lume under a lamp for 30 seconds and photograph it in a dark room. Brightness fades; evenness is what separates good from bad.
- Check the bracelet or strap fit at the lugs. End links should sit flush with no rattle and no gap under the case.
Price tiers
Replicas of a dive watch in this class cluster into three bands. The lowest band uses mineral glass, painted markers, and a basic movement, and it will look wrong in daylight. The middle band adds sapphire, applied indices, and a reliable automatic, which is where most buyers should shop. The top band copies the case finishing closely and can be hard to tell apart in photos, but it costs enough that you should ask why you are not buying a used microbrand diver instead.
Vetting the seller
- Ask for a timestamped photo of the actual watch, not a catalog shot
- Request a short video of the bezel turning and the second hand sweeping
- Confirm the return window in writing before payment
- Check whether the listing shows the movement name and the case material
- Walk away from any seller who will not show the caseback
Red flags
Blurry photos, prices far below the going rate for the tier, pressure to pay outside a traceable method, and claims of genuine parts inside a replica case are all reasons to stop. A seller who cannot tell you the movement inside the watch does not know what they are shipping.
After you buy
Have a local watchmaker pressure test the case before you swim with it, since factory seals on replicas are inconsistent. Keep the watch away from magnets, service the movement every few years, and rinse the case in fresh water after saltwater use.