The short answer
An IW371482 replica is a copy of IWC's Portugieser Chronograph in stainless steel with a blue dial. The real watch is a 41mm, two-register chronograph, so start there. If the copy gets those three things right, it is worth a serious look. If it does not, no amount of nice photography will save it.
The three things: chronograph minutes at 12, running seconds at 6, no date window. That layout is the fingerprint of this reference. A date at 3 or subdials pushed out to 3 and 9 tells you the maker used a generic movement and faked the rest.
Where to Buy Replica IW371482: A Buyer's Guide
What you are comparing against
The reference sits in a family that has run two movements over the years. Older production used the 79350, a modified Valjoux 7750. Current production uses the in-house calibre 69355, shown through a sapphire caseback. That matters when you shop, because the movement inside a copy decides the subdial positions, the case thickness, and how the chronograph pushers feel.
Case specs to hold in your head: roughly 41mm across, about 13mm thick, stepped bezel, sapphire front and back, leaf-shaped hands, applied Arabic numerals. I keep coming back to thickness. It is the single number that most copies get wrong, and it is the one you feel every time you wear it.
The three tiers you will see
- Quartz and mecha-quartz. Cheap, light, and usually wrong on the dial. Subdials are often decorative, and the sweep is a giveaway the moment someone watches it for ten seconds.
- 7750 based automatics. The mainstream copy. Subdial positions can be correct, the rotor is loud, and the small seconds at 6 is driven through extra gearing. That gear train is the known weak point.
- Higher-end automatics. Decorated plates, sharper dial printing, dimensions close to the original, sapphire both sides. This is the tier where the watch reads correctly on the wrist instead of across a room.
Dial and hands checklist
This is where most money is won or lost. Check the numerals first. They should be applied and sit slightly proud of the dial, with clean edges. Printed numerals look flat in raking light and sit flush.
- Hand shape: leaf or feuille, with a taper that narrows toward a fine point. Blunt or paddle-shaped hands are wrong.
- Subdial printing: thin concentric rings, no blur, hands that reach the markers they point at.
- Blue tone: sunburst, with a color shift across the dial as you tilt it. Flat navy paint is a cheap tell.
- Logo and lettering: correct weight and spacing. Squeezed branding usually means a re-printed dial.
- Subdial hand length: short stubs that stop before the track are the classic fault on budget copies.
Case, crystal and finish
Look at how brushing and polishing meet. On a good copy the transitions are crisp lines, not soft smears where someone buffed too hard. Pushers should feel firm with a short travel and no rattle. The bezel step should catch light evenly all the way around.
Ask about the crystal. Mineral glass scratches and shows glare that sapphire does not. On a watch at this price point, sapphire on the front is the floor, not a bonus.
Questions to ask before you pay
- What movement is inside, and does the small seconds sit at 6?
- What are the measured case diameter and thickness?
- Can you send photos of the actual piece on a ruler or with calipers?
- Is the front crystal sapphire, and is the caseback solid or glass?
- What happens if the chronograph does not reset to zero?
What to expect once it arrives
Water resistance is nominal. Treat it as splash resistant and keep it away from swimming, showers, and steam. Run the chronograph through a full start, stop, and reset cycle a few times in the first week. If the seconds hand creeps instead of snapping back to 12, return it.
One last point about intent. Wear it because you like the design, not because you plan to sell it as the real thing. Passing a copy off as genuine is a legal problem in most places and it ruins the hobby for everyone else.