Short answer
A replica of the IWC Portugieser Chronograph ref. IW371632 can look convincing on the wrist. The 41mm steel case, the two-register dial and the box-shaped sapphire are all things replica factories have solved. The movement is where most of them fall apart, and the movement is what you live with. Expect to pay $400 to $700 for the version worth owning, and check five specific details before you send money.
What the reference actually is
The IW371632 sits in the 41mm Portugieser Chronograph family, powered by IWC's in-house calibre 69355. That means a column wheel chronograph, roughly 46 hours of power reserve, a running seconds subdial at 6 o'clock and a 30-minute counter at 12. No date window. Water resistance is rated at 30m, which is polite language for splash resistant. Sapphire crystal on both sides, alligator strap, and a case that measures around 13mm thick.
Those specs are the checklist you measure a replica against. Anything that drifts from them is a tell.
Where replicas get it right
Case proportions are close on the better versions. The lugs curve the same way, the bezel polish has the right warmth, and the crown and pushers sit at the correct height. Dial printing on the top tier is crisp under a loupe, and the applied numerals have a proper facet to them. The strap is usually decent leather, though rarely real alligator.
The box sapphire is the detail that surprises people. Cheap versions use flat mineral glass and the dial loses that floating look immediately. Good versions get the dome right.
Where they fall short
Thickness is the usual giveaway. A modified 7750 with added transfer gears for the subdial layout needs room, so many replicas come in at 13.8mm to 14.5mm instead of 13mm. It reads as chunky next to the real thing, and it sits higher off the wrist.
The pushers are the second tell. On the genuine calibre 69355 the start and stop has a clean, light click. On a 7750-based replica the pushers feel spongy, and the chrono seconds hand can stutter when it starts. Rotor noise is another one. Spin a cheap replica near your ear and you hear it.
Subdial finishing varies a lot. The real dials have fine concentric rings in both registers, and the print is thin. Replicas often print heavier and the rings read flat.
Five checks before you pay
- No date window. The IW371632 has no date. A date aperture at 3 o'clock means you are looking at a different reference or a fantasy dial.
- Thickness. Ask the seller for caliper photos. Anything past about 13.5mm and you are wearing the compromise.
- Subdial positions. Running seconds at 6, chrono minutes at 12. Reversed or swapped, walk away.
- Caseback decoration. The display back should show Geneva stripes, blued screws and an engraved rotor. A plain undecorated movement at $600 is a bad deal.
- Pusher feel on video. Ask for a short clip of the chrono starting, stopping and resetting. A snapping reset to zero is what you want.
Movement tiers
Three broad tiers exist. Under $200 you get quartz or a basic automatic with a dummy chrono, and those are costume pieces. Around $250 to $400 you get a modified 7750 with fair finishing. Above $450 you get the same architecture with better decoration, tighter regulation and a better dial. Nobody is shipping a true clone of the 69355 at scale, so treat any claim of an in-house copy with real suspicion.
Red flags
- Photos that match a boutique listing exactly, including the background
- No QC pictures before shipping
- Prices under $100 for an automatic chronograph
- Sellers who cannot tell you which movement is inside
- Pressure to pay outside a trackable method
Bottom line
The IW371632 is a good candidate for a replica because the design is quiet. Nobody spots a Portugieser across a room. What they notice is thickness, pusher feel and dial clarity, so spend your money on those three things and skip the cheapest tier entirely.