Reference IW371407 belongs to the IWC Portugieser Chronograph line, known as the ref. 3714 family. IWC built that line from the late 1990s until about 2020. The genuine watch is a two-register chronograph with a 40.9 mm case and calibre 79350, a Valjoux 7750 base that IWC modified.
A "replica IW371407" is not made by IWC and carries no license. Sellers use the IWC reference number to label a copy of that dial layout and case size. No copy sold today uses an IWC movement.
Specs of the genuine ref. 3714 platform
- Case: stainless steel or gold, 40.9 mm across, 12.3 mm thick
- Crystal: sapphire front and back
- Water resistance: 3 bar
- Movement: calibre 79350, automatic, 28,800 vph, 31 jewels, 44-hour power reserve
- Dial: two subdials, 30-minute counter at 12, running seconds at 6
- Date: window at 3 on most references
- Strap: 20 mm at the lugs
What is not confirmed here
IW371407 is one dial and case combination inside the 3714 series. IWC used many numbers for the same platform, for example IW371401, IW371417 and IW371446. I do not have a primary IWC document in hand that states the dial color, hand finish and case metal for IW371407 alone. Check an IWC service record or the caseback engraving before you trust any claim about that single number.
Where copies differ
- Case thickness: most copies run 1 mm to 3 mm over 12.3 mm
- Movement: Chinese ST19 hand-wound, a 7750 clone, or quartz in the low tier
- Crystal: mineral glass at the bottom, sapphire higher up
- Dial: printed indices instead of applied, wrong date font, subdial hands at the wrong pivot
- Pushers: soft travel, no crisp reset
- Caseback: shallow engraving, wrong font for the reference number
Prices seen in the market
Quartz copies sell from about $30 to $80. Automatic copies with a 7750 base sell from about $150 to $350. The tier sellers call "super clone" runs $400 to $700. None of those prices buy an IWC movement.
Legal status in the US
Counterfeit watches are illegal to import into the United States and illegal to sell there. 18 U.S.C. § 2320 covers trafficking in counterfeit goods, and a first offense carries up to 10 years. U.S. Customs and Border Protection seizes shipments and destroys them. A personal-use claim does not stop a seizure. IWC and its parent company own the marks on the name, the logo and the reference numbers.
Checks on a watch in hand
- Measure case thickness with calipers.
- Compare subdial pivot points against a photo of a genuine dial.
- Time the chronograph reset.
- Check caseback stamp depth and font.
- Ask for a service invoice from IWC.