Our top pick for a replica IW371471 is a top-tier build with a clone-style chronograph movement and a correctly proportioned twin-register dial. The Portugieser Chronograph is a plain-looking watch with nowhere to hide: the dial is wide and open, so subdial spacing, index thickness, and hand length are visible from across a table. We judged options on five things: subdial geometry and printing, case profile and finishing, movement type and pusher feel, crystal and strap quality, and how openly the seller describes what is actually in stock.
What the IW371471 is, and why it is hard to copy
IW371471 sits in IWC's Portugieser Chronograph family: a 41 mm steel case, a twin-register dial with a 30-minute counter at 12 and running seconds at 6, a thin bezel, and no date window. Genuine examples are slim for an automatic chronograph, roughly 12 to 13 mm depending on generation, with a double-box sapphire crystal that gives the dial a slight curve at the edges. Depending on generation, the movement is either the 79350 (a modified Valjoux 7750) or the in-house 69355.
IWC has released many 3714xx variants with different dial colors, hands, and strap options, so confirm the exact dial configuration you want before ordering. A replica sold as an IW371471 that arrives with a date window at 3 or a three-register layout is a different watch entirely.
Tier 1: entry replicas (quartz and basic automatic)
- Pros: lowest cost, keeps reasonable time, looks acceptable at a distance, a cheap way to test whether 41 mm suits your wrist.
- Cons: ticking seconds hand on quartz versions, subdials that are printed or non-functional, thick case, shallow dial printing, weak or missing anti-reflective coating, gold-tone models with plating that wears through at the lugs.
Use case: buy this only as a size check or a costume piece. It will not pass a close look, and the chronograph pushers often do nothing.
Tier 2: mid-tier automatics with a 7750-family movement
- Pros: real chronograph function, sweeping seconds, subdials that actually count, a movement a watchmaker can service, better case finishing than entry stock.
- Cons: the 7750 architecture pushes the subdial spacing and hand stack away from the genuine layout, the case often runs 1 to 2 mm too thick, pusher feel is soft, and running-seconds-at-6 variants use a transfer gear train that can fail.
Use case: the sensible middle. You get a working chronograph and a dial that reads correctly at arm's length, and you accept a slightly thicker case.
Tier 3: top-tier builds (closest dial and case)
- Pros: subdials placed and sized close to the genuine twin-register layout, applied indices with correct height, cleaner printing, crown and pusher proportions that match, better crystal with visible edge distortion, near-genuine thickness.
- Cons: highest cost, limited and shifting stock, still not a genuine watch, and service support depends entirely on the seller's movement choice.
Use case: this is the pick for anyone who has handled the real watch. Buy it only from a seller who will show you photos of the actual unit, not catalog renders.
Dial, subdials and printing
Start here, because this is where cheap copies break. Check that the two subdials sit on a clean vertical axis, that the gap between them matches the reference, and that the minute track has even spacing all the way around. Look at the numerals and indices: thin, flat, and glued-down is a bad sign. The text under 12 should be crisp at 2x zoom, with no bleed into the dial. There is no date window on this reference, so any aperture is an immediate disqualifier.
Case, crystal and finishing
Ask for the measured thickness and lug-to-lug in millimeters, not a guess. Check that the brushed flank and polished bezel meet on a sharp line, that the caseback engraving has depth rather than laser-gray fill, and that the lugs curve rather than ending in a blunt block. On the crystal, look for the double-box curve and a blue or purple tint that fades from the edges. A flat, glare-heavy crystal is the fastest tell in person.
Movement and chronograph feel
Ask what is inside. A 7750-family automatic is the usual mid-tier answer. Clone-style chronograph movements cost more and feel tighter when you start and stop the chrono. On video, listen for a clean crisp click and check that the reset snaps to zero on the first press, not after a wobble. A jerky or sticky reset means the chrono module or the reset hammer is poorly set.
Strap and hardware
The genuine watch ships on alligator-grain leather with a signed tang or deployant. Replicas often ship with stiff embossed leather and a light buckle. Budget for a strap swap, and confirm the lug width so you buy the right size. A good strap does more for the look than almost any other upgrade.
How to vet a seller
- Ask for dated photos of the exact unit, including the caseback and the crown side.
- Request a short video of the chronograph start, stop, and reset.
- Confirm the movement type in writing before payment.
- Check return terms and whether the seller covers a dead-on-arrival movement.
- Treat water resistance claims as marketing. Do not swim with a replica.
Keep in mind that a replica is not a genuine IWC, and it should never be sold or represented as one. Import rules in several countries restrict counterfeit goods, so check your local position before ordering.
Bottom line
If you want the closest thing to the real IW371471 on the wrist, pay for the top tier and spend your effort on seller vetting. If you want a working chronograph at a fair price and can live with a thicker case, the mid-tier 7750 build is the reasonable choice. Skip the entry tier unless you are only checking fit.