Short answer
A replica IW329117 is a copy of the IWC Aquatimer Automatic from the IW3291 reference family. The genuine watch has a 42 mm steel case, a 300 m water rating, and calibre 30120 inside. Replica builds copy the outside: case shape, bezel, dial, hands, and strap. They do not copy the movement, the case sealing, or the finishing standard.
The reference in numbers
- Case: steel, 42 mm diameter, about 14 mm thick
- Crystal: sapphire with antireflective coating
- Bezel: unidirectional, outer ring drives an inner dive scale
- Water resistance, genuine: 300 m
- Movement, genuine: calibre 30120, automatic, 4 Hz, 42 hour power reserve
- Strap: rubber or steel bracelet, depending on the suffix
IWC uses the digits after the dash to mark dial color, strap, and market variants. Public spec sheets that list IW329117 alone are thin. Ask the seller for a photo of the caseback engraving and match it to the dial before you pay.
What replicas get right
Case diameter and lug spacing follow the original on mid and top tier builds, so aftermarket straps fit. Dial printing, applied markers, and hand shape sit close to the original at those tiers. The inner dive scale turns with the outer ring on builds that copy the linkage. Most builds do not.
Where replicas differ
- Movement: an Asian ETA 2892 clone (A2892) or a Miyota 9015 in place of calibre 30120
- Water resistance: gaskets and caseback sealing are the weak point. A 300 m claim on a replica is marketing, not a test result
- Lume: dimmer and shorter lasting than the genuine watch
- Bezel action: lighter clicks, more play at the ring
- Finishing: brushed to polished transitions show tool marks under a loupe
Water resistance in practice
Treat a replica as splash proof. Do not swim, shower, or dive with it unless a watchmaker pressure tests it first and replaces the seals. A test costs little. A flooded movement costs a new movement.
Price tiers
Entry builds run about $120 to $200. Mid tier runs $250 to $400 and adds a clone 2892 plus cleaner dial print. Top tier runs $450 to $700. These are market ranges, not fixed prices, and they move with batch and seller.
Checks before buying
- Ask for a caseback photo and confirm the reference engraving.
- Ask which movement is inside. A2892 and Miyota 9015 take service parts. Unbranded movements do not.
- Ask for bezel photos at 12 o'clock and 6 o'clock to check alignment.
- Ask for case thickness measured with calipers.
- Confirm strap width and whether the buckle is signed.
- Get the return window in writing.
Service and ownership
Clone 2892 and Miyota movements take standard parts, so a local watchmaker can regulate or swap them. Case parts, crowns, and bezel inserts are harder to source. Buy a spare strap at the same time as the watch. Rubber straps on replicas age faster than the case.