Top pick: the best fake IW371475 is a top-grade build that copies the genuine case at roughly 41 mm wide and close to 13 mm thick, runs a working chronograph with a 30-minute totalizer at 12 and small seconds at 6, and arrives with real QC photos of the exact unit you will receive. Every recommendation below is judged on five points: case size and profile, dial printing and sub-dial placement, chronograph movement and pusher feel, caseback and strap hardware, and how transparent the seller is about what they are shipping.
Those criteria matter because the Portugieser Chronograph is a dressy watch with a slim bezel and a wide open dial. A replica factory can copy a logo in an afternoon. It struggles with half a millimeter of case height and with sub-dials drilled in the wrong position, and both of those show up the moment the watch is on a wrist.
What the IW371475 reference actually is
The IW371475 sits inside IWC's Portugieser Chronograph family, which means the details that decide whether a copy looks right are shared across the line: two sub-dials stacked vertically, applied Arabic numerals, leaf-shaped hands, a thin polished bezel, and a dial that reads large because the chapter ring sits close to the edge. Buyers searching for a fake IW371475 are usually chasing that specific look, not a generic chronograph.
Before you compare any replica, pull the official product photos for the reference from IWC's own site and keep them open. Every judgment below is a comparison against those images, not against memory.
Criterion 1: Case diameter and thickness
Case geometry is the first thing a knowledgeable eye reads and the first thing budget factories get wrong. A copy that measures 43 mm or sits at 15 mm tall will look like a different watch on the wrist, no matter how good the dial is.
- Pro: a top-grade case keeps the lugs slender, the bezel thin, and the caseback profile shallow, so the watch slips under a shirt cuff the way the genuine does.
- Con: mid-tier cases often add height to fit a thicker movement, which pushes the whole watch up off the wrist and makes the bezel look wider than it should.
Ask the seller for caliper photos of width and thickness, plus a straight-on side profile shot. Side profiles reveal caseback curvature and lug taper, which stock renders never show honestly.
Criterion 2: Dial printing and sub-dial placement
On a wide, clean dial, errors have nowhere to hide. Look at the spacing between the two sub-dials, the thickness of the printed minute track, and the way the numerals are applied rather than painted.
- Pro: good copies use applied indices with clean edges, a crisp minute track, and sub-dials that sit on the correct vertical axis with correct spacing from the center pinion.
- Con: cheap dials show fuzzy printing under magnification, numerals that sit slightly rotated, and sub-dials pushed too far apart or too close together.
Also check the date aperture if your reference has one: its position, the shape of the cutout, and whether the font matches official photography. Date font is a classic tell on Portugieser replicas because it is easy to produce and rarely checked.
Criterion 3: Chronograph movement and pusher feel
The stacked sub-dial layout at 12 and 6 realistically requires a 7750-family chronograph with a reworked gear train. That single fact separates working chronographs from watches with decorative sub-dials. If a seller cannot tell you what movement is inside, assume the sub-dials do not function.
- Pro: a 7750-based copy gives a real 30-minute counter, a real running seconds hand, and pushers with a firm start-stop and a crisp reset.
- Con: quartz versions fake the layout entirely, and low-grade mechanicals can show a stuttering seconds hand or a reset that does not snap back to zero.
Ask for a short video of the chronograph being started, stopped, and reset. That clip answers more questions than any spec sheet.
Criterion 4: Caseback, strap, and hardware
If your reference carries a closed caseback, do not pay a premium for movement decoration nobody will see. Put that budget into the dial, the crystal coating, and the strap. Where an exhibition caseback is present, the finish on the bridges and the engraving quality become fair game for scrutiny.
Strap quality changes the perceived value of a replica more than most buyers expect. Thin, stiff leather with plastic-looking edge paint drags down an otherwise good watch. A properly stitched strap with a signed buckle does the opposite.
The three tiers you will encounter
Budget tier
- Pro: lowest cost, fine if you want the silhouette for occasional wear.
- Con: oversized case, non-working sub-dials, printed rather than applied numerals, and hardware that tarnishes.
Mid tier
- Pro: real chronograph function, decent dial printing, reasonable value.
- Con: extra case thickness, sub-dial spacing that is close but not correct, louder rotor noise.
Top grade
- Pro: correct proportions, clean dial detailing, working chronograph, solid strap and buckle, and sellers who provide per-unit QC photos.
- Con: highest cost in the replica market, and servicing a clone chronograph later is not simple.
Which tier fits your use case
If the watch is a daily wearer and you care about how it reads across a table, buy top grade and accept the cost. If it is a occasional piece for photos and travel, mid tier covers the look at a fraction of the spend, provided the case thickness is acceptable to you. Skip the budget tier unless the watch is a costume piece, because the wrong case size is the one flaw no accessory can hide.
Red flags before you pay
- Only manufacturer renders or catalog photos, no images of the actual unit.
- No answer on which movement is inside, or a vague answer like “imported mechanism.”
- Pushers that feel mushy in the video, or a chronograph that is never demonstrated running.
- No stated return window and no policy on a watch that arrives with a misaligned dial.
A fake IW371475 is worth buying when the case is right, the dial is right, and the seller shows you the watch before it ships. Get those three and the rest is detail.