Short answer
A replica IW329129 is a copy of an IWC Aquatimer Automatic dive watch. Prices run from $250 for a basic build to $600 for a top tier copy. The case measures 42 mm across. The crystal is sapphire. The strap is rubber or steel. Four checks decide quality: case finish, dial print, bezel action and lume.
One caveat. IWC sorts dial colors and strap types by code inside a reference family. Seller photos are the source for the exact dial and strap on IW329129. Ask for a photo of the case back engraving before you pay.
What the genuine watch is
IWC lists the Aquatimer Automatic as a dive watch with a 300 m rating and a rotating dive scale. The calibre 30120 carries a 42 hour power reserve. Case and crown are steel. Weight on a rubber strap sits near 100 g. Replicas copy the case shape, the dial layout and the hands. They copy the branding too, which is the part buyers need to weigh against the price.
What good copies get right
- Case profile: the mid case has a slight taper, and copies at $350 and up match it.
- Crystal: sapphire with anti reflective coating on the inner face.
- Dial: applied hour markers, printed minute track, lume filled hands.
- Weight: 95 g to 110 g on rubber, close to the original.
Where copies fail
- Bezel action: cheap builds feel loose and click at the wrong angle.
- Dial print: the date wheel font runs wide on most $250 builds.
- Lume color: copies glow blue green when the original glows blue.
- Crown threads: rough on arrival, cross thread in the first month.
- Case back engraving: shallow lines, weak contrast.
Movement options
Three movements show up. The clone ETA 2824 runs at 28,800 vph and hacks. The Miyota 9015 is thinner and runs at 28,800 vph. The 21 jewel 2813 is the cheap choice at 21,600 vph. Ask which one the seller ships. A 2824 or 9015 build costs $120 to $180 more and holds time within 10 seconds a day after regulation.
Water resistance
Replicas are not tested to ISO 6425. Gaskets are the weak point. Do not dive with a copy. A pressure test at a local shop costs $20 to $40 and confirms the seals hold at 3 bar, 5 bar or 10 bar.
Buying checklist
- Ask for a macro photo of the dial at 12 and at 6.
- Request a short video of the bezel turning.
- Confirm the movement model in writing.
- Measure the lug width and compare it with a strap you own.
- Ask for timegrapher numbers: rate in seconds a day, amplitude, beat error.
- Confirm the return window in writing.
Price bands
- $200 to $280: 2813 movement, stamped clasp, sapphire with no coating.
- $300 to $420: 2824 clone, sapphire, lume that lasts 6 hours.
- $450 to $600: 9015 or Swiss 2824, crisp bezel, AR coating, sharp engraving.
Care
Rinse the case in fresh water after salt water contact. Wipe the gaskets dry. Service the movement every 4 to 6 years. Store the watch with the crown screwed down. Keep the case away from solvent cleaners.