Short answer
IW329016 is an IWC reference in the 3290 block. That block belongs to the Aquatimer Automatic line, a dive watch with an internal rotating bezel and a 42 mm case. IWC publishes the full spec for each reference on its own site. Check that page first, then compare the replica to it. No public source confirms every detail of IW329016 alone, so treat a seller's spec sheet as unverified until you match it against IWC's listing.
What the reference number tells you
IWC reference numbers are not random. The digits after IW point to a case family and a variant. A 3290 reference means Aquatimer Automatic. The last two digits mark dial color, strap type or market variant. A seller who calls a 42 mm Aquatimer a "Portofino" or lists a 40 mm case has the wrong reference. Ask for the caseback photo before anything else. The reference is engraved there with the serial.
Four checks that set the grade
- Movement: in-house style automatic versus a bought-in Asian or Swiss clone.
- Case finish: brushed flanks, polished bevels, sharp lug edges.
- Bezel action: the internal rotating bezel turns on the crown at 2 o'clock, with defined clicks.
- Crystal and dial: sapphire with anti-reflective coating on both faces, flat printed markers.
Movement is the price split
Replica Aquatimer cases ship with three common movements. A Miyota 9015 costs the least and runs at 28,800 vph. An Asian copy of a Swiss automatic sits in the middle. A genuine Swiss-made automatic or a decorated clone sits at the top. Ask for a photo of the movement with the caseback off. Ask for a timegrapher reading: rate in seconds per day, amplitude in degrees, beat error in milliseconds. A seller who cannot supply that reading is selling blind.
Case, bezel and crystal
Measure the case with calipers. The Aquatimer Automatic is 42 mm across, crown guards included in the profile. A 41 mm or 43 mm case is a different watch. The internal bezel should rotate under the crystal, driven by the crown at 2 o'clock. On cheap builds that crown is decorative or moves the bezel with slack. Check the crystal edge. Sapphire has a sharp, hard edge and clear AR tint. Mineral glass shows scratches and a blue or green cast under a lamp.
Dial, hands and lume
Look at the printing under 10x magnification. Genuine dial text has crisp edges and consistent stroke width. Replica text shows bleeding, uneven spacing or a wrong font weight. Lume on a genuine dive watch glows for hours. A replica with painted markers fades in 20 minutes. Charge the dial with a phone torch for 30 seconds and time the glow.
Caseback and serials
The caseback carries the reference, the serial and the water resistance rating. Compare the engraving depth and font to a photo of a genuine example. Serial numbers on replicas repeat across batches. Search the serial in owner forums and dealer databases. A number that appears on three listings is a batch number, not a serial.
Water resistance
Aquatimer models are rated to 300 m. A replica is not. Gaskets, caseback threads and crown seals on replica cases are not tested to that rating. Do not swim with one. A pressure test at a watchmaker costs $30 to $60 and will show the real limit.
Price bands
- Entry replica, Miyota movement, mineral glass: $150 to $280.
- Mid replica, clone automatic, sapphire: $280 to $450.
- Top replica, decorated Swiss-style movement, better case: $450 to $800.
- Genuine Aquatimer Automatic, used: low thousands of dollars.
Any seller asking $1,200 for a replica is charging a premium with no matching movement.
Questions to ask before paying
- Send a photo of the caseback with the reference and serial visible.
- Send a timegrapher photo with rate, amplitude and beat error.
- Confirm the movement name and the beat rate.
- Confirm case diameter with calipers in the photo.
- Confirm the return window in writing.
Legal note
Sale of counterfeit watches is illegal in the US and the EU. Customs seizures are common on cross-border shipments. Buyers carry the loss when a parcel is held.