IW323720 is an IWC reference number. IWC did not list this exact reference in its current online catalogue when this guide was written, so treat any seller spec sheet as unverified. Copy versions of this reference sell for about $130 to $450. Most listings describe a stainless steel case, 40 to 42 mm wide, on an integrated bracelet.
What the reference number tells you
IWC reference numbers use the format IW plus six digits. The first four digits (3237) mark the model family. The last two (20) mark the variant: dial color, case metal, bracelet or strap. Two watches that share the first four digits can differ in dial and bracelet only. Ask a seller for the full number stamped on the caseback.
Specs to compare against the genuine watch
- Case diameter and thickness. Measure with calipers. A 1 mm gap changes the wrist presence.
- Movement. IWC fits in-house calibres. Copies use Miyota 9015, Seiko NH35A, or a Chinese 2824 clone. Ask for a photo of the movement and the rotor engraving.
- Bracelet. Integrated end links sit flush against the case on the genuine watch. Gaps at the lugs are the fault seen most on copies.
- Dial print. Check the font weight of the brand name and the date window position.
- Crystal. Genuine watches use sapphire with anti-reflective coating on both faces. Copies coat one face in many cases.
- Weight. Steel copies run 120 g to 160 g. A weight under 100 g points to plated alloy.
Movement options and specs
Miyota 9015: 24 jewels, 28,800 vph, about 42 hours of power reserve. Seiko NH35A: 24 jewels, 21,600 vph, about 41 hours. Chinese 2824 clones copy the ETA 2824 layout and take ETA parts in most cases. Swiss ETA 2824-2 and Sellita SW200 movements push the price above $400.
Price bands
$120 to $200: alloy or 316L case, quartz or low-grade automatic, mineral glass. $200 to $350: 316L steel, Miyota or NH35, sapphire, clean dial print. $350 to $600: Swiss or Sellita movement, better bracelet finishing, closer dial details. Above $600 the gain per dollar drops.
Checks before you pay
- Ask for photos with a timestamp. Stock images from the brand site are a red flag.
- Ask for a movement photo with the caseback removed.
- Ask for the caseback engraving. Reference, serial, and country-of-origin marking should match the brand layout.
- Confirm the return window in writing. 7 to 14 days is normal.
- Pay by a method with chargeback rights. Wire transfers and gift cards do not carry them.
Legal status in the US
Counterfeit watches carry a fake trademark. Importing them into the United States is prohibited, and CBP can seize and destroy shipments. Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320, with a first offense carrying up to 10 years. Personal use is not charged the same way as resale, but the item can still be seized.
Quick answer
A first copy of IW323720 costs $130 to $450. The price tracks the movement and the finishing, not the reference number. Confirm the base model with the seller, then compare case size, movement type, bracelet fit, and caseback engraving against photos of the genuine watch.