Replica IW329006: the short answer
A replica IW329006 is judged on three things: case geometry against the reference figures, dial execution under magnification, and movement behavior on a timegrapher. Seller photos prove none of these. Measure the case, loupe the dial, time the movement, then decide. The reference sits in IWC's Portugieser Automatic 40 family, so the small seconds at 6 o'clock, the thin bezel, and the slim profile are the details replicas get wrong first.
Prerequisites
- Digital calipers with 0.01 mm resolution
- 10x loupe or USB microscope
- Timegrapher access, yours or a watchmaker's
- The official IW329006 spec sheet on screen
- QC photos from the seller with a dated card in frame
Inspection steps
- Write down the reference figures first: case diameter, case height, lug width, dial layout, and crystal type for IW329006.
- Measure the case at four points with calipers and average the readings against the recorded diameter.
- Measure height at the crystal edge and at the caseback rim, since replica cases often gain thickness at the midcase.
- Check lug width with the caliper jaw and fit a strap of the stated size to test for play.
- Loupe the dial at 10x and read each printed line: the wordmark, "SCHAFFHAUSEN", the model text, and the minute track.
- Compare the small-seconds hand to the printed track at 6 o'clock; the tip should reach the inner index, not stop short.
- Tilt the dial under light and inspect applied markers for burrs, glue residue, and uneven polish.
- Check any date aperture for centering, font weight, and a cut that sits flush with the dial surface.
- Work the crown through every position: winding feel, hand-setting, hacking, and quickset.
- Run the watch on a timegrapher and record rate, amplitude, and beat error in six positions.
- Wind to full, rest the watch 24 hours, then note how much of the stated power reserve remains.
- Inspect caseback engraving depth and the display back for the correct anti-reflective tint.
- Have a watchmaker pressure-test the case before the watch sees water.
What the movement tells you
Most replicas of this reference run either a Japanese automatic with a modified bridge or a decorated clone of the in-house calibre. Both can keep time. The difference shows in finish and serviceability: sharp anglage, printed rather than engraved markings, and a rotor that wobbles under light finger pressure are all signs of a low-tier build. Ask which movement is inside and whether parts are available.
Red flags
- Only stock catalog images, no dated QC shots
- Claims of "Swiss made" on a watch at a fraction of retail
- No stated return window or no refund on customs seizure
- Seller who cannot name the movement or the case dimensions
- Pressure to pay outside a tracked, refundable method
Legal note
Counterfeit watches are restricted goods in the United States. Shipments can be seized at the border, and the buyer carries the loss when that happens. Confirm the seller's seizure policy in writing before paying.