Quick Answer
IW323775 is an IWC reference number from the IW3237 block. IWC used that block for Ingenieur Automatic models in the late 2000s. A replica IW323775 is a copy built by a third party. No such copy matches the original in movement, case finishing, or tolerances. IWC does not publish a public spec sheet for every six digit variant, so confirm the case size, caliber, and dial color in IWC's own reference archive before you compare a listing to anything.
Why Listings for the Same Number Look Different
Sellers reuse reference numbers. A page titled IW323775 may show a 40 mm case in one listing and a 46 mm case in another. Some listings copy photos from genuine watches. Others use renders. The number in the title is marketing text, not proof of a spec match.
IWC reference numbers are engraved on the caseback between the lugs, next to the case number. Ask for a photo of that engraving. Blur is a signal.
Specs to Verify First
- Case diameter and lug to lug length. Compare against the seller's stated numbers, not the photos.
- Caliber. IWC Ingenieur Automatics of that era used IWC in house movements or modified ETA base movements. Replica cases hold clone or generic movements with different bridges.
- Crystal. The original is sapphire with anti reflective coating on both faces. Replica crystal coatings vary.
- Bracelet and end links. Integrated bracelet fit is the weak point in replica cases.
- Water resistance. IWC Ingenieur cases use a screw down crown and gaskets. Replica listings state a rating that nobody tests.
Movement Checks
Open the caseback or study a movement photo. A genuine IWC movement shows Geneva stripes, blued screws, and a signed rotor. Replica movements show plain plates, printed text, and a rotor that spells the brand name in the wrong font. Rotor text on a replica is printed, not engraved.
Beat rate matters. A 21,600 vph movement in a watch that should run at 28,800 vph is a mismatch. A timegrapher app on a phone gives a rough read.
Case, Dial, and Date
Check the date window position and the date wheel typeface. Replica date wheels use a different font. Check the dial print: the IWC logo, the Ingenieur line, and the Swiss Made mark at 6 o'clock. Replica dials drop or misplace one of those lines.
Check the bezel screws. Ingenieur references use five screws in the bezel. Countersunk screw heads sit flush on the original. Replica screws sit proud or strip when turned.
Price Bands
Replica listings for this number run from about $80 to $500. Genuine IWC Ingenieur Automatics from the same block sell in the thousands of US dollars on the secondary market. A listing under $1,000 that describes the watch as genuine is not genuine. Box and papers do not change that.
Legal Note for US Buyers
Counterfeit watches are prohibited merchandise in the United States. US Customs and Border Protection can seize shipments. Import and sale of counterfeit goods carries civil and criminal exposure under 19 U.S.C. 1526 and 18 U.S.C. 2320.
Red Flags
- Stock photos taken from a different reference.
- No caseback photo.
- Price under $1,000 for a watch described as genuine.
- Seller refuses a timegrapher reading.
- Typo in the brand name on the dial or the rotor.
Questions for the Seller
- What is the case diameter, measured with calipers?
- What caliber number is stamped on the movement?
- Can you send a photo of the caseback engraving?
- What is the beat rate?
If a seller answers three of those four, the listing is still a replica listing. Use the answers to check IWC's archive, not to trust the seller.