The best replica IW371696 for most buyers is the top-tier automatic build that uses a modified 7750 with a working chronograph-minute totalizer at 12 o'clock, a 41mm case held within about half a millimeter of the original, and a display back with a decorated plate. I judged every option below on five things: dial layout accuracy, case thickness and profile, whether the subdials actually function, crystal and anti-reflective coating, and how the watch holds up after a year of regular wear. Price was not a criterion on its own, because the gap between tiers is usually smaller than the gap in how the watch behaves on the wrist.
What the IW371696 actually is
The IW371696 sits in the Portugieser Chronograph 41 family: a 41mm steel case at roughly 13mm thick, two subdials (running seconds at 6, chronograph minutes at 12), a date window at 3, sapphire crystal front and back, and IWC's in-house 69355 chronograph movement with a column wheel and vertical clutch. That subdial layout is the reason this reference is hard to copy well. Most chronograph movements put their counters somewhere else, so a factory that wants a convincing IW371696 has to modify or re-engineer the movement instead of dropping in an off-the-shelf caliber.
Reference codes in this line are tied to dial color, strap and market, so confirm the exact dial variant with your seller before you pay. The build advice below applies either way.
Criteria that separate a good build from a bad one
- Subdial function: the 12 o'clock counter should track elapsed chronograph minutes. Many builds wire it to a 24-hour hand or leave it decorative, which is visible the moment you start the chrono.
- Case thickness: the original runs near 13mm. A 7750-based build often adds 1 to 2mm, and that extra depth shows at the lugs and under a shirt cuff.
- Dial printing and date font: the numerals, the minute track and the date wheel font are the three places where cheap builds slip first.
- Crystal and coating: the original has a slightly domed sapphire with a subtle blue reflection. Flat, heavily tinted or uncoated crystals stand out in daylight.
- Caseback: the watch has an exhibition back, so whatever sits behind the glass gets seen. A plain undecorated rotor is a giveaway.
Top pick: modified 7750 build with a working 12 o'clock counter
This is the tier to buy if you plan to wear the watch, use the chronograph and hand it to a friend without thinking twice. The movement is a reworked 7750 with the subdial functions repositioned to match the original layout, and the case is usually machined closer to the genuine profile than anything below it.
- Pros: chronograph minutes actually count at 12; running seconds at 6 sweep instead of tick; thickness typically lands in the 13.5mm to 14mm range; decorated movement visible through the display back; correct domed sapphire with anti-reflective coating; date font and dial print usually close to the original.
- Cons: the most expensive tier by a wide margin; servicing is difficult because many watchmakers will not touch a modified 7750; availability is inconsistent and sellers cycle stock; pusher feel is firmer than the genuine column wheel action but not identical.
Wear it if: this is your daily watch, you use the chronograph, and you would rather own one good build than three compromised ones.
Mid tier: standard A7750 build with layout compromises
The most common replica of this reference uses an unmodified or lightly modified Asian 7750. It runs, it keeps reasonable time, and it looks broadly correct from across a table, but the layout tells the truth up close.
- Pros: widely available and easy to replace; parts and service are more accessible; lower entry cost; the case finishing on the better examples is genuinely decent; solid everyday reliability if you avoid dropping it.
- Cons: the 12 o'clock subdial is frequently a 24-hour indicator or non-functional; case runs 1 to 2mm thicker than the original; rotor noise is audible; pusher action feels vague; printing and date font vary a lot between batches.
Wear it if: you want the silhouette, you rarely run the chrono, and you accept that the watch is a look rather than a tool.
Budget tier: quartz or basic automatic
At the bottom of the market you get the proportions and the dial color, and little else. These builds exist to be photographed and worn occasionally.
- Pros: lowest cost; thin case; accurate timekeeping with almost no maintenance; lightweight and comfortable; fine as a stand-in for a formal event or a photo shoot.
- Cons: the running seconds subdial ticks rather than sweeps, which is the fastest way to spot the watch; the movement behind the display back is visibly crude; case finishing is soft at the edges; strap quality is usually poor; no meaningful water resistance.
Wear it if: you want the appearance of the reference for a specific occasion and have no interest in the mechanics.
Checks to run before you pay
- Ask for a video with the chronograph started and stopped. Watch the 12 o'clock subdial: it should advance in small increments, not sit still.
- Ask for caliper photos across the caseback and the crystal. Anything past 14.5mm is a thick build.
- Ask which movement is inside, in writing. If the seller cannot name it, walk away.
- Look at a close-up of the date window and the printing around the subdials. Blurry edges mean a cheap dial.
- Assume no water resistance. Have any build pressure tested locally before you wear it near water, and never swim with one untested.
Verdict
Buy the modified 7750 build if the chronograph matters and you want one watch that holds up to inspection. Buy the standard 7750 build if you want the case and dial on a budget and can live with a decorative counter. Buy the quartz only when the watch is a costume piece. In every tier, the seller's willingness to send a live video of the chrono running tells you more about the build than any listing photo.