Short answer

IW323773 is written in the IWC reference format: the letters IW plus six digits. IWC uses the 323 block for Ingenieur models. Sellers list copies under the same number because buyers search by digits, not by caliber.

A fake IW323773 is a replica. It carries no IWC warranty, no service record with IWC, and no match to IWC catalog data. IWC public product pages do not list production details for every number in the 323 block, so confirm the reference with IWC or a watchmaker before you treat any spec as fixed.

What a reference number proves

One IWC reference maps to one case size, one movement, and a set dial and bracelet combination. Two watches that share a reference should match on all three. Copies mix parts from two references, so a watch can show a 40 mm case with a dial from a different model.

Six checks that separate a copy from an IWC

  1. Caseback engraving. IWC cuts the reference and serial into the caseback. Letters sit at even depth with sharp edges. Copies laser etch shallow text with soft edges.
  2. Movement. Ask for a photo of the caliber. IWC finishes bridges with Geneva stripes and signs the rotor. A solid caseback blocks this check.
  3. Dial. Applied indices on an IWC sit flush. Check the date window, the font of the numerals, and the thickness of the printing.
  4. Crown. The crown carries the IWC mark and threads without grit.
  5. Papers. The warranty card, the caseback, and the box label should show the same reference and serial. Numbers that do not match point to a mixed set.
  6. Price. A used IWC Ingenieur Automatic sells for several thousand US dollars. Listings in the low hundreds are copies.

What first copy means

First copy, 1:1, AAA, and super clone are seller terms. No standards body defines them. The labels change with each seller and each batch. A seller grade describes cosmetic detail, not materials or movement reliability.

Legal position in the US

IWC holds registered trademarks. Under 19 U.S.C. Section 1526, US Customs can seize goods that carry a counterfeit mark. Selling a counterfeit watch can bring civil claims under the Lanham Act and criminal charges under 18 U.S.C. Section 2320.

Buying steps

Ask for a movement photo and a caseback photo. Ask for the serial. Ask about a return window. Pay with a method that allows a chargeback. Have a watchmaker open the case before the return window closes. If the seller refuses any of these steps, stop.