Quick answer
The replica IW329126 copies the IWC Aquatimer Automatic 42, a steel diver with a 42 mm case, an internal rotating bezel, and a 300 m rating on the genuine watch. A good replica nails the case profile, the dial layout, and the crown-driven inner bezel. It will not match the movement, the bracelet finishing, or the true water resistance. Buy it as a look-alike, never as dive gear.
What the genuine reference is
Know the original before you judge a copy. The Aquatimer Automatic 42 uses IWC's SafeDive system, where the inner bezel is driven by the crown at 4 o'clock instead of a outer ring, so the timing scale sits under the crystal and cannot be knocked out of position.
- Case: stainless steel, 42 mm across, about 14 mm thick
- Bezel: inner rotating ring turned by the crown at 4 o'clock, with a lumed marker at the zero point
- Crystal: domed sapphire with anti-reflective coating on both faces
- Water resistance: 300 m on the factory watch
- Movement: IWC calibre 30120, automatic, built on the Sellita SW300-1 base, about 42 hours of power reserve
- Dial: applied indexes with lume fill, date window at 3 o'clock
- Strap: rubber or steel bracelet depending on the variant
Checks that matter on a replica
- Ask for caliper photos on a flat surface. The case should read 42 mm across and about 14 mm thick. A 40 mm case or a 16 mm slab is an instant tell.
- Work the crown at 4 o'clock. The inner bezel should step through its detents, turn in both directions, and line up at 12. A stiff ring or a slipping one points to weak internals.
- Study the crystal under light. Genuine spec calls for coating on both faces, so you expect a faint blue or purple tint and little reflection. Bare glass with heavy glare is a downgrade.
- Zoom on the dial. Indexes should sit level, lume fill should be even, and the date font should match the reference. Crooked markers show up fast in photos.
- Ask which movement is inside. Common builds use an Asian clone of the ETA 2824 or Sellita SW200, a Miyota 9015, or a decorated 30120 copy. Winding feel and rotor noise separate the tiers.
- Test the crown threads. The crown should catch on the first half turn and seat with two or three turns. Cross-threading on a new watch means the tube is cut wrong.
- Read the caseback. Engraving depth, font weight, and reference text should be crisp. Laser-etched text that looks grey and shallow is a budget sign.
- Fit the bracelet or rubber strap. End links should meet the lugs with no gap, and the clasp should close with a firm snap.
Red flags
- A seller who promises real 300 m water resistance on a replica
- Only renders or stock images, no photos of the actual unit
- A "Swiss movement" claim with no photo of the movement or rotor
- No return window and no tracking
Living with the watch
Keep it away from pools, showers, and the sea unless a watchmaker has pressure tested it and replaced the gaskets. Rinse the case with fresh water after contact with sweat or salt, dry it with a soft cloth, and store it off the crown to relieve the stem. Expect a service every three to five years if you wear it daily, and budget for a new movement rather than a repair if the original fails, since parts for clone calibres are cheap and swapping is often the cheaper path.