Short answer
IW323752 is an IWC reference number. IWC builds references as IW plus four model digits plus two variant digits. The model block here is 3237. The variant is 52. Variant digits cover dial and strap or bracelet combinations. Public IWC data for 323752 is thin. Confirm the model name, case size, and movement with IWC or an authorized service center before you buy.
Fakes of this reference exist. Replica makers target IWC lines and reuse case shapes across references. The tells sit in the details: engraving depth, movement finish, print quality, and bracelet hardware.
Check 1: caseback engraving and serial numbers
IWC engraves the reference and the case serial on the caseback. Lines are thin and even. Counterfeit engraving looks shallow or soft under a 10x loupe. Serial numbers on fakes repeat across sellers. Search the serial before you pay.
Check 2: movement
IWC automatics run at 28,800 vibrations per hour, or 4 Hz. A timegrapher shows the rate. A reading of 21,600 vph on a watch sold as this reference points to a generic movement. Look at the rotor. Real IWC rotors carry deep engraving and consistent finishing. Fake rotors use printed text and one flat color.
Check 3: case and crystal
Measure the case with calipers. The numbers must match the caseback. Anti-reflective coating on IWC crystals covers both faces on many models. Fakes coat one side. A blue or purple cast on the glass is a sign of a single-side coating.
Check 4: dial and hands
Print edges under a loupe are sharp. Fakes show thick text, uneven spacing, and indices with the wrong lume color. Real hands have chamfered edges. Fakes look flat.
Check 5: bracelet and end links
Solid end links sit flush with the case. Fakes leave a gap near 0.5 mm and use split pins where IWC uses screws. Screw heads on real bracelets take a 1.4 mm driver and thread clean.
Check 6: weight and water resistance
Weigh the watch. A fake in the same case size reads 10 to 25 grams lighter, from a hollow caseback and a plated brass case. A 10 bar mark means 100 m under ISO 22810. Do not pressure-test a suspected fake.
Red flags at a glance
- Price below 60 percent of the current used market.
- Seller refuses movement photos or a timegrapher readout.
- No box, no papers, no service record.
- Serial number that returns no record at IWC.
- Dial text with the wrong font weight or spacing.
Verification steps
- Ask for the serial and reference from the caseback.
- Request a timegrapher photo with rate and amplitude.
- Request a movement photo at 10x.
- Send the serial to IWC service for a check.
- Buy only with a return window and pay with a method that reverses.
Unknown: IWC does not publish a public archive of every variant. Treat any spec claim about 323752 as unverified until IWC confirms it.