The short answer
A replica IW371758 lives or dies on the dial and the pushers. The case shape is easy to copy. The Portugieser layout is not. If the subdial spacing looks off, or the chronograph hands snap back with a cheap click, walk away no matter how good the photos look. Buy the version with the correct dial hardware and the better movement, or buy nothing.
Expect to pay somewhere between $280 and $550 depending on movement and finishing tier. Anything under $200 is usually a photo watch, meaning it looks fine on a listing page and feels wrong in your hand.
What this reference actually is
The IW371758 sits in the IWC Portugieser Chronograph family, one of the cleanest chronograph designs still in production. Thin feuille hands, a silvered dial, applied numerals, two subdials, and a case that wears wider than its numbers suggest. That simplicity is exactly why copies are hard to get right. There is nowhere to hide a mistake.
Before you compare replicas, pull the official specs from IWC and note the real case diameter, thickness, and lug width. Then measure the replica you are considering. Sellers routinely list a thickness that is a full millimeter off, and on a dress-adjacent chronograph that difference is visible on the wrist.
What I check first
- Dial printing. The brand text and city line should be crisp at macro distance, not soft or merged. Subdial rings should be printed, not stamped into the plate.
- Hand shape. Feuille hands taper to a point. Cheap copies use a blunt leaf that reads as a paddle.
- Subdial position. On the real layout the registers sit where the movement places them. If the factory relocated them, the spacing looks slightly crowded every time.
- Pusher feel. Screw-down pushers should thread cleanly. The chrono start should feel firm, with a short, definite engagement.
- Case finishing. Brushed flanks, polished bezel edge, and a clean transition between the two. Look for polish bleeding onto the brushed surface.
- Date font. The numeral shape and window cut are two of the most common tells.
Movements and what they cost you
Most replicas in this family run on an A7750-derived chronograph movement. It works. It also carries the usual weaknesses: the date change can be fragile if you set it while the mechanism is engaged, and the rotor is louder than you expect. The better tiers use a closer clone of the in-house calibre, with decorated bridges and a smoother chrono engagement.
My rule is simple. If the watch has an exhibition back, the movement finish has to earn the price. Plain, stamped bridges under a sapphire back are a bad deal at $500.
Price brackets in plain terms
- Under $200: photo-grade. Skip it.
- $250 to $380: decent case and dial, basic movement, average strap. Fine as a daily beater if the dial is right.
- $400 to $550: better dial hardware, closer case finishing, stronger movement. This is where most buyers should sit.
- Above $600: only worth it if the movement is a genuine step up and the seller can show macro photos and a timing reading.
Seller checks that save you money
Ask for a video with the chrono started, stopped, and reset. Ask for a shot of the caseback and a close crop of the dial text. Ask what happens if the watch arrives dead, and get the answer in writing. A seller who only sends stock images is not a seller, they are a middleman with a download folder.
When it lands, have a local watchmaker pressure test it before you trust it near water. Replica gaskets are inconsistent, and water resistance claims on listings are marketing, not specification. Budget $30 to $60 for that service and treat it as part of the purchase price.
Bottom line
A good replica IW371758 is a handsome chronograph that nails a classic layout for a fraction of the real thing. A bad one is a $300 lesson in dial printing. Judge the dial, the pushers, and the movement, in that order, and you will end up with the version worth owning.