IW371419 in one line
IW371419 is a reference in the IWC Portugieser Chronograph line. The base reference is IW3714. The final two digits mark a dial and case variant. IWC built the 3714 family from 1998 to 2020. The watch is a two register chronograph in a 40.9 mm steel case. Genuine examples sold new for about $7,900 near the end of the run. Replica versions sell for $180 to $600.
IWC does not publish a spec sheet for IW371419 on its current site. The reference is out of production. Public catalogs do not document the dial color or strap for the exact -19 variant. Check the dial code against the caseback engraving before you buy.
Specs that matter for authentication
- Case: stainless steel, 40.9 mm diameter, 12.3 mm thick
- Lug width: 20 mm
- Movement: IWC calibre 79350, automatic, built on the Valjoux 7750 architecture
- Frequency: 28,800 vph, or 4 Hz
- Power reserve: 44 hours
- Registers: chronograph minutes at 12 o'clock, small seconds at 6 o'clock
- Date: aperture at 3 o'clock
- Crystal: sapphire front and display back
- Water resistance: 3 bar, 30 m
- Strap: alligator leather on a steel pin buckle or folding clasp
Where replica IW371419 watches fall short
Replica Portugieser chronographs use a 7750 clone. The architecture matches, so the subdial layout copies with few errors. The faults sit in finish and tolerance.
- Case thickness runs 13.5 mm to 14 mm. The genuine case measures 12.3 mm.
- Subdial hands sit at the wrong height above the dial.
- Printed text uses a heavier font. The IWC logo on real dials is thin and sharp.
- Date wheel numerals differ. Copies show a flat, wide digit.
- Rotor noise. A 7750 clone rattles when you shake it. The 79350 runs quiet.
- Caseback engraving. Genuine reference numbers are cut into the metal, not laser printed.
Checks before purchase
- Ask for a caseback photo. The reference number should read IW371419, or IW3714 plus the variant code.
- Ask for a movement photo through the display back. A 7750 beats 8 times per second. Clones at 21,600 vph beat 6 times.
- Measure the case. Any thickness above 13 mm points to a replica.
- Run the chronograph. The minute counter at 12 o'clock should jump at the 60 second mark. A creeping hand means a cheap module.
- Ask for service history. Service on a calibre 79350 runs $500 and up at IWC.
Price context
Secondary market prices for a steel IW3714 sit between $5,500 and $8,000. Box, papers, and service records move the number. Replica sellers ask $180 for a low grade copy and $600 for a so called super clone with a modified 7750. No replica carries an IWC movement. IWC does not supply calibre 79350 to outside buyers.