What the IW371408 Is
IW371408 sits in the IWC Portugieser Chronograph line, the 3714 family. The case measures 40.9 mm across and 12.3 mm thick. Two subdials run the dial: chronograph minutes at 12 o'clock, running seconds at 6 o'clock. A date window sits at 3 o'clock. The reference does not appear in every collector list, so check IWC's product archive for the dial color, strap and production years tied to IW371408.
Genuine Specifications to Compare
- Case: stainless steel, 40.9 mm, 12.3 mm thick
- Crystal: sapphire front and back, antireflective coating
- Water resistance: 3 bar (30 m)
- Movement: calibre 79350, automatic, 44-hour power reserve
- Base movement: ETA 7750, reworked by IWC
- Strap: leather, 20 mm lug width
- Functions: hours, minutes, small seconds, chronograph, date
What Replica Versions Use
Most replicas of the 3714 run a Chinese clone of the ETA 7750. The standard 7750 carries three subdials at 12, 6 and 9. The Portugieser layout needs two. Builders mask or remove the 9 o'clock register and move the running seconds to 6 o'clock. A smaller group of replicas uses a quartz chronograph with a two-register dial. Quartz copies cost less and keep time with more accuracy, but the seconds hand ticks once per second. The 79350 beats at 28,800 vph, eight steps per second.
Checks Before Buying
- Subdial count and position: 12 and 6. A register at 9 o'clock is the wrong layout.
- Seconds hand motion: a smooth sweep points to a mechanical movement. One tick per second points to quartz.
- Date aperture: compare the font, frame depth and position against archive photos.
- Chronograph reset: the minute counter returns to zero in one push.
- Caseback: reference and serial numbers engraved, sapphire display back fitted.
- Hands: leaf shape, correct length against the minute track.
Price Range
Replica prices for this reference run from about USD 250 for quartz versions to USD 600 for automatic versions with a decorated 7750 clone. Used genuine 3714 watches trade between about USD 5,000 and USD 9,000, based on condition, box and papers. Prices change with the market.
Water Resistance and Service
Replica gaskets are thinner than the parts IWC fits, and crowns seal with less contact. Do not swim with a replica unless a watchmaker pressure-tests it first. A 7750 clone needs a service interval of three to five years. Many watchmakers refuse to service replicas, so plan for a replacement movement instead.
Legal Position in the United States
U.S. law bars the import, sale and distribution of goods that carry a counterfeit trademark. CBP can seize shipments at the border. Personal use carries less exposure than resale, but import and resale fall under the same statute.