The short answer
IW371459 is an IWC Portugieser Chronograph reference. The 3714 block is the Portugieser Chronograph family. The last two digits mark the dial and strap variant. IWC does not publish a public archive entry that confirms the dial color for IW371459. Confirm the variant with IWC service before you buy or sell.
Fake IW371459 watches exist. Most run on a Chinese 7750 clone or a hand-wind chronograph. The main tells are the beat rate, the caseback engraving, the pusher feel, and the crystal coating.
Reference basics
- Family: IWC Portugieser Chronograph, reference block 3714.
- Case: 40.9 mm stainless steel on the steel variants.
- Movement: IWC calibre 79350, based on the ETA 7750.
- Beat rate: 28,800 vph, 8 beats per second, 4 Hz.
- Power reserve: 44 hours.
- Water resistance: 30 m on the steel references.
- Crystal: sapphire with antireflective coating on both faces.
Beat rate test
A 7750 runs at 28,800 vph. Hold the watch to your ear and count beats for 15 seconds. A real watch gives 120 beats. A 21,600 vph movement gives 90 beats. Cheap fakes use the 21,600 vph unit. Super clones often use a 28,800 vph 7750 clone, so this test can pass. Treat it as one check, not the only one.
Caseback and engraving
Look at the reference and case number. Real engraving is sharp and even, and sits inside a clean recess. The format reads IW371459. Fake engraving looks shallow and off-center. Case numbers on fakes repeat across batches. Two watches with the same case number is a red flag.
Pushers, crown, and reset
Start the chronograph. Stop it. Press reset. A 7750 reset snaps back in one motion. Fakes drag or need a second press. The crown on a real watch winds with light, even resistance. Pushers on a fake sit at uneven heights.
Dial and hands
Check the applied numerals and the printing. IWC and SCHAFFHAUSEN hold a fixed gap. Fakes get the spacing wrong or use a font with heavier serifs. Subdial hands on a fake can sit at the wrong height above the dial.
Crystal and coating
Sapphire on a real watch carries an antireflective coating on both faces. Reflections look faint and blue-green. Fakes use mineral glass or a single coating. The dial reads flat and gray.
Price check
Used steel IW3714 watches trade in the mid four figures USD on the secondary market. A seller asking a few hundred dollars for a new IW371459 is not selling an IWC. Ask for a movement photo, a caseback photo, and a video of the chronograph running.
What to ask the seller
- Photo of the caseback with the reference and case number.
- Photo of the movement with the rotor and balance visible.
- Video of chronograph start, stop, and reset.
- Service history, box, and papers.