The IW371734 belongs to the IWC Portugieser Chronograph family, a bicompax layout with counters at 12 and 6 o'clock, leaf hands, and a railway minute track. If you want one, buy the genuine reference from an authorized dealer or a vetted secondary seller with full documentation. Listings built around the phrase "replica iw371734" describe counterfeit goods, not an IWC product. Those watches carry no manufacturer warranty, cannot be serviced by IWC, and can be seized at customs. The sections below explain what to check on a real IW371734 and where fakes fall apart.
Verify the Reference First
Portugieser Chronograph references differ in case size, movement, and dial finish, so confirm what IW371734 actually specifies before comparing listings. Ask the seller for the reference number engraved between the lugs, the movement calibre, and the production year. Cross-check those details against IWC's own reference data. A seller who cannot supply a clear case-back photo, a reference number, and a serial that matches the paperwork is not worth pursuing.
What to Inspect on a Genuine Watch
Case, dial, and crystal
- Case finishing shows crisp transitions between brushed and polished surfaces.
- Applied numerals sit level, with sharp edges and even plating.
- Subdial spacing is fixed by the movement, so proportions stay correct on every genuine example.
- The sapphire crystal carries even antireflective treatment, with no rainbow tint at an angle.
Movement and case back
- Engraving on the rotor and bridges is cut, not stamped, and stays legible under magnification.
- Chronograph start, stop, and reset feel firm, with no grinding or slack.
- Serial and reference numbers are engraved, evenly spaced, and match the certificate.
Parameter Bands to Expect
Use these ranges as a sanity check. Exact figures depend on the version of IW371734 you are examining.
- Case diameter: roughly 40.9 mm to 41 mm
- Case height: roughly 12.3 mm to 13.1 mm
- Water resistance: 3 bar, which covers splashes and rain but not swimming
- Power reserve: about 44 to 46 hours
- Strap: leather, usually alligator, on a signed pin or folding clasp
Pitfalls That Cost Buyers Money
- Press photos reused across listings. Ask for dated photos of the actual piece.
- Prices far below the going rate for the reference. Deep discounts on a current IWC model are a warning sign.
- "Swiss made" claims on counterfeit dials. The marking is easy to print and proves nothing.
- Missing papers and service records. Without them, resale value and authentication both suffer.
- Skipping third-party authentication. A watchmaker can open the case and confirm the calibre in minutes.
FAQ
Do replicas of the IW371734 use real IWC movements?
No. Counterfeit watches use third-party or cloned movements. IWC does not supply parts to counterfeiters, and IWC service centers will not work on a fake. Some will confiscate it.
Is buying a replica IW371734 legal?
Selling counterfeit goods infringes trademarks and is illegal in the United States and most other markets. Buyers risk seizure of the item and loss of the money paid, with no practical route to recover it.
Where should I buy a genuine IW371734?
An authorized IWC retailer gives you a warranty and provenance. On the secondary market, choose a seller with a return policy and pay for independent authentication before that window closes.