What is a fake IW371615?
A fake IW371615 is a non-IWC copy of the Portugieser Chronograph reference IW371615, a 41 mm stainless steel chronograph from the IW3716 family. The genuine watch runs IWC's in-house 69355 calibre, a column-wheel chronograph with a 46-hour power reserve. Replicas fail in three places: the movement, the caseback, and the dial print.
Fakes fall into two broad groups. Low-grade copies sell for under $150 and use quartz or a basic automatic. High-end 1:1 replicas are built from a scanned case and can look convincing on a wrist photo. The checks below separate the two in about five minutes.
What are the fastest tells on a fake IW371615?
1. The movement and pusher feel
The 69355 is a column-wheel design, so the chronograph pushers start and stop with a crisp, short click and no wobble. Fakes usually carry cam-actuated clones such as the A7750, which feel soft and mushy at the pusher. A decorated rotor that reads IWC on top of an obviously generic bridge layout is the single most common giveaway.
2. The caseback
The IW3716 generation shows its movement through a sapphire display back. A solid steel caseback on a watch sold as an IW371615 is a red flag. On open backs, check the engraving depth and the finish of the perlage and Cotes de Geneve: laser-printed text sits flat, genuine engraving catches light.
3. Dial printing and applied numerals
Genuine dials use applied Arabic numerals and leaf hands with sharp, faceted edges. Fakes often print the numerals flat, use lume that is uneven under a loupe, and misalign the subdial hands at the zero position. The IWC SCHAFFHAUSEN lettering under 12 should be crisp and evenly spaced, with no bleed at the edges.
4. Case size, crystal and strap
The case measures 41 mm across and about 13 mm thick. Many fakes run 42 mm or more, and the extra bulk shows at the lugs. Genuine sapphire carries anti-reflective coating on both faces, so a milky or heavily reflective crystal points to single-sided coating or mineral glass.
How do the replica tiers compare?
- Budget tier, under $150: quartz or low-grade automatic, printed dial, mineral glass, wrong case thickness.
- Mid tier, $200 to $400: decorated Asian chronograph movement, closer dial, soft caseback engraving.
- 1:1 tier, $400 and up: correct 41 mm case, sapphire crystal, cloned 69355 bridges over a serviceable base, accurate hand shape and font weight.
How do you verify a seller's claims before paying?
- Ask for macro photos of the dial, caseback and crown, taken in daylight.
- Request a short video of the chronograph starting, stopping and resetting to zero.
- Compare the photos against a known genuine listing, focusing on the subdial spacing and hand length.
- Run a reverse image search to confirm the photos are not recycled from another seller.
- Pay through a method with buyer protection and confirm the return window in writing.
Is a replica IW371615 worth buying?
It depends on what you want from the watch. A 1:1 tier replica delivers the 41 mm proportions, the two-register dial and the wrist presence at a fraction of the price. It will not hold value, and the movement will need service sooner than a genuine IWC calibre.
Can a jeweler tell instantly?
A trained eye usually spots a fake within seconds by flipping it over. The movement finish, the engraving quality and the caseback construction are hard to fake at low cost.
Does a replica keep its value?
No. Replica prices fall on the secondary market, while genuine Portugieser Chronographs hold a large share of their retail price.