What the IW371704 reference is

IW371704 is an IWC reference inside the 3717 family of Pilot's Watch Chronograph Automatics. The base reference is 3717. The last two digits mark a dial, case and strap combination within that family. IWC built the 3717 line from the mid-2000s to 2012. The 3777 family replaced it with a larger case and an in-house movement. IWC's current online catalog does not list every 3717 variant, so the exact dial and strap code for 371704 is not documented on the brand site.

Genuine specs for the 3717 platform

  • Case: 42 mm stainless steel, brushed and polished surfaces
  • Movement: IWC caliber 79320, automatic, based on the ETA 7750
  • Rate: 28,800 vph, 25 jewels, 44-hour power reserve
  • Functions: hours, minutes, small seconds, chronograph with 30-minute and 12-hour counters, day and date at 3 o'clock
  • Crystal: sapphire with anti-reflective coating on both faces
  • Water resistance: 60 m
  • Extra: soft-iron inner case for magnetic protection

What replica sellers list

Replica listings for IW371704 use a 42 mm steel case copy and a 7750-type automatic chronograph movement. Most of these run at 28,800 vph. Finish quality varies by factory and by batch. Common weak points are subdial spacing, the date and day wheel font, rotor noise, and case thickness. A replica carries no soft-iron cage and no factory service.

Checks before you buy

  1. Measure the case across the bezel. The genuine 3717 is 42 mm without the crown.
  2. Check subdial layout. Running seconds sits at 9 o'clock. The 30-minute counter sits at 12 and the 12-hour counter at 6.
  3. Check the day and date window for alignment and font shape.
  4. Start the chronograph, run it for a minute, then reset. The hand should snap back to 12.
  5. Listen to the rotor. Loud grinding points to a dry or low-grade movement.
  6. Look at the crystal tint. Double-sided anti-reflective coating gives a blue sheen under light.

Legal status in the United States

Replica watches raise trademark and copyright issues. US Customs and Border Protection can seize counterfeit goods at import. Selling them can lead to criminal charges under 18 U.S.C. 2320. A replica is not a genuine IWC. It has no factory warranty, no box, and no papers from Schaffhausen.

Price and resale

Replica prices run from about 100 to 400 USD. Movement grade and case finish drive the spread. Replicas do not hold value. A service on an Asian 7750-type chronograph often costs as much as a replacement movement.