Quick answer
IW329059 belongs to the IWC 3290 reference block. That block is the Aquatimer Automatic 42 mm line. A replica of this reference copies the case shape, dial layout, hands, and strap. It does not use an IWC caliber. Prices for these copies run from about $40 to $400. IWC's public catalog does not list IW329059 as a current reference at the time of writing, so treat the exact variant as unconfirmed until you see the caseback text.
What the number means
IWC reference numbers use the format IW plus six digits. The first four digits name the family. The last two name the variant.
- 3290 = Aquatimer Automatic 42 mm
- Final digits = dial color, strap type, or limited edition
- Adjacent numbers in the same block share the case and movement, with different dials or straps
Genuine specifications at family level
- Case: stainless steel, 42 mm diameter, about 14 mm thick
- Crystal: sapphire with anti-reflective coating
- Water resistance: 300 m
- Movement: caliber 30120, automatic, 28,800 vph, 42-hour power reserve
- Functions: hours, minutes, seconds, date, dive bezel
Variant details such as dial color, bracelet, and bezel finish change with the last two digits. Confirm those against photos of the specific reference.
What changes in a replica
- Movement: Miyota 9015, Seagull ST21, or a low-grade clone. Beat rate is 21,600 vph on cheaper units. Power reserve is shorter.
- Case: 316L steel with different brushing and polishing lines. Thickness runs 1 mm to 2 mm over spec on many units.
- Crystal: mineral glass on cheap units, sapphire on better ones. Anti-reflective coating is often one side only.
- Lume: weaker output and shorter glow time.
- Water resistance: sellers quote 30 m to 100 m. Few units are pressure tested. Swimming voids the claim in practice.
- Engraving: caseback text, font weight, and depth differ from the genuine piece.
Price bands
- $30 to $80: quartz or basic automatic, mineral glass, stamped clasp.
- $90 to $180: Miyota or Seagull automatic, sapphire on some units, better dial printing.
- $200 to $400: decorated clone movement, closer case geometry, sapphire with two-sided coating.
These numbers reflect seller listings, not resale value. A copy holds little resale value.
Checks before paying
- Ask for a movement photo with the caliber visible.
- Ask for caliper readings of case diameter and thickness.
- Ask for a lume photo at 30 seconds and at 5 minutes.
- Ask for a pressure test result if you plan to wear it in water.
- Compare the caseback engraving against photos of the genuine reference.
- Confirm the return window and the payment method.
A seller who refuses any of these requests is a risk. Stock photos instead of dated photos of the actual unit are a second warning sign.
Legal position in the United States
Counterfeit watches are illegal to import and to sell. 18 U.S.C. 2320 covers trafficking in counterfeit goods, with fines and prison terms. U.S. Customs and Border Protection can seize a shipment, including one watch sent to a private address. Seizure letters go to the importer. Money paid to the seller is not recovered.
Bottom line
IW329059 is a 3290-block Aquatimer number. A replica at any price is a copy with a different movement, different finishing, and no warranty from IWC. Check the reference against IWC's own catalog before you spend money, and check the import rules for your country.