Quick answer
A replica IW329084 is sold as a copy of an IWC watch in the 3290 reference block. Before you pay, match three specs: case diameter, dial layout, and movement caliber. Listings that omit any of the three stay unverified.
What the reference number tells you
IWC reference numbers start with IW and use the trailing digits to separate dial color, case metal, bracelet, and market variants inside one family. The 3290 block covers round automatic models with a date window. Two listings from the same block can differ by dial finish, strap, and case coating.
No single published spec sheet for IW329084 appears in the sources checked for this guide. Confirm case size, lug width, and caliber with an IWC boutique or the brand archive before you compare replica listings. Skip that step and you compare two different watches.
Case and dial points to verify
- Case diameter in mm, plus thickness. Ask for a caliper photo.
- Lug width in mm. A 1 mm mismatch shows at the strap joint.
- Dial color and index style. Print the listing photo at 1:1 and compare index length against a reference image.
- Date window position and date font.
- Caseback engraving depth and text.
- Water resistance claim. Most replicas use gaskets that do not match the number printed on the case.
Movement
Three movements appear in this band.
- Asian clones of the ETA 2824 and 2836. Beat rate 28,800 vph (4 Hz), 25 jewels, 38 to 40 hours of power reserve. The seconds hand moves in eight steps per second.
- Miyota 9015. Beat rate 28,800 vph, 24 jewels, about 42 hours. Hacking and hand winding.
- Decorated clones with added plates and rotor engraving. The decoration covers a base caliber. Check the beat rate with a timegrapher app.
A 21,600 vph movement (6 beats per second) is the simplest tell. IWC automatics in this family run at 4 Hz.
Checklist before paying
- Macro photos of the serial and reference stamp.
- Timegrapher screenshot with rate, amplitude, and beat error.
- Movement photo taken without the caseback.
- Return window in writing.
- Payment method with chargeback.
Where replicas fall short
Case finishing: the genuine watch uses brushed and polished surfaces with sharp transitions. Replicas round those edges during polishing. Dial printing: genuine dials hold a clean edge at 10x magnification, and replica print softens. Sapphire: anti-reflective coating on two sides is common on the genuine watch and absent on most replicas. Movement: a decorated clone is not the same architecture as the original caliber, and service parts do not cross over.
Swiss made claims
Swiss labeling rules set thresholds for movement origin and assembly. A listing that says Swiss made without a caliber number is a marketing line. Ask for the caliber number and the beat rate.
Unknowns
The IW329084 case diameter, caliber, and production years are not confirmed here. Verify with IWC before you buy.