Short answer
IW323797 does not appear in IWC's published reference lists. IWC builds modern reference numbers as IW plus six digits, and the Aquatimer Automatic line sits in the 3239 block. A watch sold under IW323797 needs verification from IWC or an authorized dealer before you buy or sell it. If the number is absent from the IWC database, the watch is a replica or carries a mismatched case back.
How IWC reference numbers work
IWC splits a reference into a family prefix and a variant suffix. The leading digits mark the model family and case size. The trailing digits mark dial color, strap or bracelet, and market. A genuine Aquatimer case back carries the full reference, a serial number, a caliber number, and a case material code. Photos from IWC catalogs and dealer listings give you the layout to compare against. A number that matches no catalog entry points to a typo, a swapped case back, or a counterfeit.
Case back and engraving
- Font and spacing. IWC engraves a consistent sans-serif. Replicas show uneven stroke width and tight letter spacing.
- Cut depth. Genuine engraving cuts into the steel. Many fakes etch a shallow mark that catches light at one angle.
- Serial number. It should match the warranty card and the movement.
- Water resistance rating. It should match the model. Aquatimer cases are rated to 300 m or more on most references.
Movement checks
Modern Aquatimer watches use IWC calibers. The caliber number on the case back should match the movement visible through the display back. Replicas often hide a third-party movement behind a case back that names a different caliber. Look at rotor engraving, perlage on the bridges, and screw heads. Genuine finishing is even. Copy finishing leaves tool marks and uneven graining.
Dial, hands, and bezel
- The IWC wordmark is applied metal, not printed ink, on modern references.
- Date wheels align square in the window. Off-center or slanted numerals are a common replica flaw.
- Lume plots sit level with the dial surface and hold an even color.
- The rotating bezel moves in defined clicks with no play on the inner ring.
Papers, box, and price
Genuine sets include a warranty card with the reference and serial numbers, a manual, and a box that matches the model era. Numbers on the card should match the case back. Price is the fastest filter. A current Aquatimer trades in a defined band on the used market. An offer far below that band, with no service history and no box, is a warning sign.
Before you buy
- Request photos of the case back, crown, and movement at high magnification.
- Ask IWC or a Richemont service center to confirm the reference and serial numbers.
- Compare the engraving and dial layout against official IWC images.
- Check the seller's history and the return policy in writing.
If any number fails to match, stop. No paperwork, price, or seller story repairs a reference that IWC cannot confirm.