Short answer first: a replica IW329113 earns its price only when three things are right. The 42mm case, a working SafeDive bezel, and a mechanical movement worth servicing. Everything else is polish. Most of the ones I handle fail on the bezel or the date wheel, and both of those are obvious the moment you pick the watch up.
What the real IW329113 does
The reference sits in IWC's Aquatimer Automatic 42 family, the diver line that replaced the older two-crown Aquatimers. Stainless steel case at 42mm, sapphire crystal with anti-reflective coating, screw-down crown at 3 o'clock, and a 300m depth rating. Inside is IWC's in-house caliber 30120. The design feature that matters for replica hunting is the SafeDive system. There is no second crown for the inner dive ring. You rotate the outer bezel and the inner ring with the minute scale turns with it. Get that mechanism wrong and the whole watch reads fake.
The checks that separate good from bad
Bezel and inner ring
Turn the outer bezel. The inner ring should move in step, with a firm ratchet and no wobble at the 12 o'clock mark. Cheap reps glue the inner ring in place or wire it to a friction fit that drifts after a month. Line the triangle up with the 12 marker and look at the gap on both sides. Even spacing is what you want.
Dial, hands, and date
Applied indices should sit flat and catch light along the same edge. The hands are broad and sword shaped, with lume that matches the indices in color, not just in brightness. On the date window, the wheel has to match the dial variant you ordered. A white date wheel on a blue or black dial is the most common tell on this reference.
Case and finishing
Brushed surfaces on top, polished flanks, crisp transitions between them. Run a fingernail along the lug edges. Sharp, even bevels mean a decent case. Rounded, mushy edges mean a cheap one. The crown should thread without grinding and seat flush against the case tube.
Movement
Two options show up. A clone of the Swiss automatic, usually an Asian 2892 pattern, or a Miyota 9015. Both are serviceable and both sweep. Anything quartz, or a low-beat 21,600 movement with a visible stutter, is not worth the money. Ask for the movement name in writing before you pay, and ask whether spare parts exist for it.
Water resistance, honestly
Reps are assembled with gaskets, but almost none are pressure tested to the 300m the genuine watch carries. ISO 6425 sets the standard for actual dive watches, and a replica does not go through that testing. Wear it in the rain. Wear it to wash your hands. Do not dive with it, and do not take it into a pool without having a watchmaker pressure test it first.
Before you pay: a checklist
- Confirm the case measures 42mm, not 40 or 44.
- Confirm the inner ring moves with the outer bezel.
- Match the date wheel color to the dial.
- Get the movement name and beat rate in writing.
- Ask for photos of the caseback engraving and the clasp.
- Ask about bracelet taper and whether spare links are included.
- Check the return window and who pays return shipping.
What it costs and why
Price tracks the movement and the case. A Miyota build with a decent bracelet lands in the low hundreds. A clone Swiss automatic with a properly finished case doubles that. Past a certain point you are paying for bezel action and dial printing, not for anything the real watch has that a rep cannot copy.
One last thing. The Aquatimer is a quieter replica choice than a Pilot's Watch or a Portugieser because fewer people know the reference. That cuts both ways. Fewer factories build it, so the good ones are worth waiting for, and the bad ones are easier to spot once you know what to look at.