The short answer
Buy the replica IW371442 only in its automatic form. The real watch is a Portugieser Chronograph from the IW3714 family, and the single detail that decides whether a replica looks right on the wrist is the subdial layout: chronograph minutes at 12 and running seconds at 6, with no date window anywhere on the dial. That layout is what forces a 7750-based automatic movement inside the copy. Replicas with a quartz movement, a date at 3, or subdials that sit too far apart are the ones to walk away from, no matter how good the photos look. Ask for the movement type, the measured case thickness, and a straight-on macro of the dial before you order, then compare those three things against the genuine specifications.
What to look for
Case size and thickness
The genuine case measures 40.9 mm across, and the case profile is slim for a chronograph. Most good replicas land between 40.5 mm and 41.2 mm, which is acceptable. Thickness is where copies fail. Expect 12.3 mm to 13.5 mm. Anything closer to 15 mm is a 7750 sitting in a case that was not reworked, and it will sit high and wobble on the wrist.
Dial and hands
Numerals should be applied, not painted, and they should catch light along their edges. The leaf hands need a clean taper with no burrs at the tip. Printing on the dial should be crisp under a loupe, especially the word Portugieser and the track around the outer edge. Subdial rings should be recessed slightly, not printed flat.
Movement
A correct replica runs a 7750-derived automatic with a modified gear train so the counters land at 12 and 6. Wind it, listen, and watch the small seconds at 6 sweep smoothly. A ticking small seconds hand means quartz, and a quartz copy cannot be made to look right because the subdial functions will be dummies.
Crystal and finishing
The sapphire should have anti-reflective coating on the underside, which shows as a faint blue or purple tint at an angle. Brushed surfaces should run in one direction and meet polished edges cleanly. Edges that feel sharp are a sign of a low grade case.
Parameter bands worth memorizing
- Case diameter: 40.5 mm to 41.2 mm
- Case thickness: 12.3 mm to 13.5 mm
- Lug width: 20 mm, which is standard for this line
- Movement: automatic 7750 base with 12/6 conversion, 28,800 vph
- Chronograph: 30-minute counter at 12, running seconds at 6, central seconds for the chrono
- Water resistance: treat as splash proof only, regardless of what the caseback says
- Weight, head only: roughly 75 g to 95 g in steel
Common pitfalls
- Date window at 3. This reference has no date. A date cut into the dial is an instant tell.
- Quartz movements. Sellers who avoid the movement question are usually hiding one.
- Wrong subdial spacing. The two counters should sit close to the center line. Wide spacing means a stock 7750 dial was used.
- Painted numerals. Flat printed numbers look dull and do not cast a shadow.
- Caseback engraving. Spelling mistakes and shallow laser etching are common on budget copies.
- Strap quality. Most replicas ship with stiff leather. Budget for a replacement strap in 20 mm.
FAQ
Does the chronograph actually work on these replicas?
On 7750-based copies, yes. Start, stop and reset should feel positive with no grinding. Test the reset a few times before you accept the watch, and never reset while the chrono is running.
Can a local watchmaker service it?
Many can, since the 7750 architecture is common. Ask first, because some shops refuse to work on replica watches. Servicing is worth it if the movement is a genuine 7750 base rather than a cheaper copy.
Is the thickness really that important?
Yes. Thickness changes how the watch sits under a shirt cuff and how the lugs look from the side. A 2 mm difference is visible across a table.
Should I expect the same water resistance as the original?
No. Gaskets on replicas are not tested to the same standard. Keep it away from swimming and showers even if the caseback claims 30 m.
What should I ask the seller before paying?
Movement type and base calibre, measured thickness with calipers, a photo of the dial straight on, a photo of the caseback, and confirmation that a return is possible if the subdial functions do not work.