If you only verify one detail before paying for a fake IW371446, verify the subdials. The genuine Portugieser Chronograph runs its small seconds at 6 o'clock and its chronograph minutes counter at 12, with the date at 3, so a replica that keeps a stock chronograph layout will look wrong from across a table no matter how clean the dial printing is. Buy from a seller who photographs the actual unit, states the measured case thickness, and shows the caseback under good light, then compare those numbers against the real reference before money changes hands. Everything else in this guide supports that one decision.
Is the IW371446 Watch Fake? Your Guide to Authenticity
What separates a good copy from a poor one
Subdial positions and behaviour
Ask the seller to run the chronograph in a short video. The hand at 6 o'clock should sweep continuously as running seconds, and the hand at 12 should stay parked until you start the pusher, then advance in one-minute steps. A copy built on an unmodified chronograph movement often carries running seconds at 9 o'clock, which is the single clearest tell on this model. Watch for a jumping or stuttering seconds hand as well; that points to a poorly regulated or low-grade movement.
Dial colour, hands and applied markers
Reference 371446 is the stainless steel case paired with a silver-plated dial, gold-plated leaf hands, and gold applied numerals and markers. Plenty of replicas ship with rhodium or silver hands because the factory builds one dial for several references. Ask for a daylight photo with no warm filter and check the hand colour against the case: on the 371446 the hands and markers read warmer than the steel, not identical to it. Look at the printed minute track, the thinness of the leaf hands, and whether the date window edges are crisp or fuzzy under magnification.
Case size and thickness
The genuine case measures 40.9 mm across and about 12.3 mm thick, with short, tapered lugs that make it sit flat on a 6.5 to 7.5 inch wrist. Copies built around a chronograph module often add 1.5 to 2.5 mm of height, which shows up as a thick flank in side-on photos and a watch that rides high under a cuff. Request a caliper shot of the case flank and a straight-on side profile. If the seller cannot supply either, treat the listing as unverified.
Crystal
The original uses a lightly domed sapphire that catches a soft, even reflection. Cheap copies fit flat mineral glass that reflects hard, scratches quickly, and shows a visible step at the bezel edge. On a side photo the crystal should rise slightly above the bezel line, not sit flush.
Caseback and engraving
Engraving depth is where budget copies cut corners. Letters look laser-etched and shallow rather than stamped. Confirm the caseback style against photos of the exact production year you are copying, since later Portugieser Chronographs moved to display backs while the classic 3714 family used a solid steel back. A display back on a reference that should have a solid one is a hard fail, and so is a decorated rotor hiding a movement that does not match the layout.
Strap, buckle and lug width
Lug width is 20 mm. Straps on low-tier copies are usually corrected-grain leather with painted edges that crack within weeks; a decent first copy ships with a stitched alligator-grain strap and a buckle with clean, deep engraving. Budget for a replacement strap if the rest of the watch is sound, since a strap swap changes the feel of the watch more than most buyers expect.
Parameter bands worth checking
- Case diameter: 40.5 to 41.2 mm measured across the case flank.
- Case thickness: 12.0 to 12.8 mm. Anything above 13.5 mm is a module build.
- Lug width: 20 mm, strap tapering to about 18 mm at the buckle.
- Subdials: running seconds at 6, chronograph minutes at 12, date at 3.
- Crystal: domed sapphire, sitting just proud of the bezel.
- Hands and markers: gold tone on the steel 371446, not silver.
- Movement: mechanical chronograph, 28,800 vibrations per hour where stated.
How the tiers differ
Entry-tier first copies use a quartz chronograph movement. They keep time well and cost little, but the chronograph hand snaps in one-second jumps and the subdials are often decorative, printed or frozen. Mid-tier builds use a mechanical chronograph with a transferred subdial layout, which gets the 12 and 6 positions right but adds thickness and can feel loose at the pushers. Top-tier builds use a movement designed around the correct layout, with a slimmer case, engraved caseback and a date that flips within a few minutes of midnight. The gap between mid and top is mostly in the case profile and hand finishing, so inspect those two areas first.
Common pitfalls
- Stock photographs instead of images of the actual watch, which hide caseback and thickness issues.
- Silver hands advertised on a 371446 listing, a sign the seller is reusing photos from another reference.
- Claims of "1:1" or "mirror quality" with no measurements attached. These are marketing words, not specifications.
- Subdials that are printed rather than functional, common on quartz builds.
- No stated water resistance, or vague promises that ignore the caseback gasket.
- Date fonts that are too bold or a window that is oversized relative to the genuine aperture.
Questions buyers ask
How close is a good fake IW371446 to the original?
A well-built copy gets the proportions, dial colour balance and subdial layout close enough that only a side-by-side inspection of the caseback and movement finish reveals it. The case thickness and hand colour are the two areas where cheaper builds fall short.
Does the 371446 use gold hands?
Yes. The steel-cased 371446 is specified with gold-plated hands and applied markers on a silver-plated dial. Replicas frequently use silver hardware, so confirm colour in an unfiltered daylight photo.
Should I choose quartz or mechanical?
Quartz suits occasional wearers who want accurate timekeeping and no servicing. Mechanical suits anyone who will handle the watch closely, because the sweeping seconds hand and the pusher feel are part of what makes the Portugieser read correctly.
What does the date window tell me?
Check the aperture shape, the font weight and how quickly the date changes. A slow, drifting date change is normal on chronograph movements, but a badly cut window or a bold, wide numeral is a visible flaw on an otherwise convincing dial.
Is a display caseback a problem?
Only if the reference you are copying used a solid back. Match the caseback style to the exact generation you want, and ask for a close photo of the engraving, since shallow laser etching is easy to spot.