A replica IW371687 is worth buying only if it gets four things right: a 41 mm case with a slim bezel, chronograph minutes at 12 and running seconds at 6, a clean date window at 3, and crisp printing on the rail track and applied numerals. Those four points separate a wearable Portugieser Chronograph homage from a hollow case with a mismatched dial. Check them in that order before you look at price.
What does the genuine IW371687 look like?
The reference belongs to the IW3716 family of the IWC Portugieser Chronograph, a dress chronograph built around a 41 mm stainless steel case roughly 13 mm thick. The dial carries two recessed counters, a 30-minute chronograph totalizer at 12 and small seconds at 6, with a framed date window at 3. The genuine watch uses the in-house calibre 69355, a 4 Hz automatic chronograph with about 46 hours of power reserve and 30 m of water resistance.
Which case details give a replica away?
Look at the lug profile first. Genuine Portugieser lugs are long, thin, and curve down sharply, so the strap sits close to the wrist instead of flaring out. A replica with thick, blocky lugs will look wrong from across a table even if the dial is accurate.
Next, check the bezel width and the caseback engraving. The bezel should be a narrow polished ring that leaves the dial visually large, and the caseback text should be laser-crisp rather than shallow and grainy. Thickness matters too: anything approaching 15 mm will sit tall under a cuff.
How should the dial and hands be checked?
- Subdial spacing: the two counters must sit on a clean vertical axis at 12 and 6, not pushed toward the center.
- Print quality: the minute track, the brand text, and the small "automatic" line should be sharp under a loupe.
- Applied markers: the Arabic numerals and baton markers should be raised, polished, and evenly set.
- Hand finish: leaf-shaped hands should be faceted so they catch light along a center ridge.
- Date window: the aperture should be square-cut with a clean frame and a correctly aligned disc.
Does the movement matter on a replica?
Yes, because the movement dictates the subdial positions. A correct 1:1 layout needs either a clone of the 69355 architecture or a modified Asian chronograph movement with a transferred running seconds module. Cheap builds often run the seconds hand at 9 or use a quickset date that clicks through the pusher, and both are instant tells.
Ask how the chronograph starts, stops, and resets. A firm pusher with a clean snap back to zero and no jumping of the seconds hand is a reasonable sign of a sorted movement. Hand-wind it and listen for grit, then set the time and confirm the crown screws down smoothly.
What are the red flags to walk away from?
- Case width listed as 40 mm or 42 mm instead of 41 mm.
- Subdials printed flat instead of recessed with their own snailed texture.
- Photos that hide the caseback, the clasp, or the crown side of the case.
- Prices far below the normal replica tier, which usually signals a quartz or 21-jewel build.
- Sellers who will not send a short video of the chronograph running and resetting.
What should a quality replica IW371687 cost?
Expect a real Swiss-movement or high-grade clone build to sit in the mid three-figure range in US dollars, with entry-level Asian chronograph versions well below that. Anything quoted with a genuine Swiss ETA inside should come with photos of the rotor and balance. Pay for the dial and case finish, not for the label on the movement.
Is buying a replica watch legal in the US?
Counterfeit goods carrying a registered trademark can be seized at the border, and selling them exposes a seller to civil and criminal liability. Buyers should understand that risk before ordering, and should never represent a replica as a genuine IWC to a reseller or insurer.
Can a jeweler tell a replica IW371687 from the real thing?
Usually within seconds. A watchmaker looks at the movement finishing through the display back, the exact font weight on the dial, and the hand stack height above the subdials. Replica dial printing tends to sit slightly heavier and less even than the genuine article.