Quick answer
A fake IW323760 fails on four points: weight, dial print, date font, and the movement. Genuine IWC Ingenieur Automatic watches from this reference family carry an in-house calibre, a soft-iron antimagnetic cage, and case finishing that takes multi-axis CNC work plus hand polishing. Replicas copy the outline and stop there. If the weight is off by more than a few grams, the date numeral looks thin or fuzzy, or the rotor spins with a coarse whir, treat the watch as fake until you prove otherwise.
Prerequisites
- A 10x jeweler's loupe
- Digital calipers
- A digital scale that reads to 1 gram
- Reference photos of a genuine IW323760 on screen
- A caseback tool if you own the watch and plan to open it
Inspection steps
- Place the watch on the scale and record the weight in grams with the bracelet fitted.
- Compare that weight with the published figure for the reference from an official source.
- Measure the case diameter across the bezel at the 3 and 9 o'clock line with calipers.
- Measure the case thickness from the caseback to the top of the crystal.
- Hold the loupe over the dial and study the IWC mark and Schaffhausen text for sharp edges, even stroke width, and clean fill.
- Read the date numeral under the loupe and compare the typeface with the genuine wheel, watching for ragged edges or a mismatched font.
- Lay a straight edge over the hands and confirm the minute hand reaches the minute track and the hour hand sits flat with no bend.
- Inspect the caseback engraving for depth and burr-free edges, since laser etching leaves a shallow groove with rounded walls.
- Run a fingernail along the case flanks and lugs to feel the bevel and the brushed-to-polished transition.
- Check the bracelet for solid end links, clean screw heads, and a signed clasp with even stamping.
- Turn the crown through several full rotations and feel for smooth threading and correct engraving on the head.
- Set the watch beside a quartz clock and log the rate over 24 hours.
- Open the caseback with the proper tool if you own the watch, then compare the movement finish, jewel count, and rotor engraving with reference photos.
- Write down the serial and reference numbers from the caseback and send them to IWC service for a records check.
- Take the watch to an independent watchmaker who services IWC and ask for a written opinion before you buy or return it.
Common tells on replicas
- Weight under the reference figure by 20 grams or more
- Soft or filled dial printing
- Date font that does not match the genuine wheel
- Shallow caseback engraving with rounded edges
- Rotor that spins with a loud whir or wobble
- Bracelet screws that strip on the first turn
- Box and papers with wrong fonts or a reference that does not match the watch
If you already bought one
Stop wearing it, photograph every angle, and keep the listing, messages, and payment record. Contact the seller in writing and request a return. If the seller refuses, file a dispute with the payment platform and report the listing. A watchmaker's written note that the movement is not an IWC calibre carries weight in a dispute.