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Judge the seller before you judge the watch. Ask for dated photos of the exact unit you will receive, including the caseback, crown, clasp, and a close shot of the dial printing. Get the movement type, case measurements, and the return window in writing before payment, and pay with a method that offers chargeback protection. Listings that use factory renderings, reuse photos from an official IWC page, or refuse a live video call are listings to skip. Set the expectation now: this is a copy of the IWC Portugieser Chronograph reference IW371435, not an IWC. It carries no manufacturer warranty, no collector value, and no reliable service path. If holding value matters more than the look, put the same budget toward a pre-owned genuine watch or a respected independent brand.

What the IW371435 reference is

The IW371435 sits in the Portugieser Chronograph family, a line built around a large round case, a clean dial, applied numerals, a railroad minute track, and a two-register chronograph layout: a 30-minute counter at 12 o'clock, small running seconds at 6 o'clock, and a date aperture at 3 o'clock. Compare every one of those details against current official specification photos, because replica makers mix elements from different 3714 variants and from the later 3716 generation. Subdial position, date window shape, hand shape (leaf versus baton), and the exact dial color are the first tells.

What to look for in the copy

  • Dial printing. Text should be sharp under a loupe. Crooked indices, bleeding paint, and uneven lume are the common defects.
  • Subdial function. Both counters should sit on the vertical center line. Start the chronograph, let it run a few minutes, then reset. It must return to zero in one motion.
  • Date aperture. The window should be crisp and centered, and the date should flip near midnight rather than drift through the evening.
  • Crystal. Sapphire with anti-reflective coating. Mineral glass scratches and gives a dull, gray reflection.
  • Case and caseback. Crisp lug bevels, no tooling marks, and sharp engraving rather than fuzzy laser etching.
  • Crown and pushers. A screw-down crown and chronograph pushers with firm, smooth travel. Any wobble is a fail.
  • Movement. An Asian 7750-family automatic with a modified seconds-at-six layout. Ask for a timegrapher photo that shows rate, amplitude, and beat error. Quartz versions are cheaper, silent, and usually have a dead 30-minute counter.
  • Strap and hardware. Even stitching, solid buckle, and the correct tang shape for the reference.
  • Water resistance. Assume splash protection only, no matter what the listing claims.

Parameter bands to check

  • Case diameter: 40.5 mm to 41.5 mm
  • Case thickness: 12.3 mm to 13.5 mm
  • Lug width: 20 mm
  • Weight on a leather strap: about 70 g to 90 g. A very light case points to a hollow build or thin finishing.
  • Movement: automatic, 28,800 vph, 38 to 44 hours of power reserve after a full wind
  • Chronograph: 30-minute totalizer at 12, small seconds at 6, instant reset to zero

Pitfalls

  1. Grade labels. Terms like AAA, 1:1, and super clone are marketing, not a standard. Ignore them and inspect photos.
  2. Borrowed images. Photos lifted from a genuine watch page tell you nothing about the unit for sale.
  3. Unverified claims. Swiss made, sapphire, and 100 m ratings appear on low-tier listings with no supporting test.
  4. No paper trail. A seller who will not issue an invoice or state a return window in writing leaves you with no remedy.
  5. Service dead end. Many watchmakers decline replica work, and parts availability for modified chronograph movements is limited. A repair can cost more than the watch.
  6. US legal exposure. Importing or reselling counterfeit goods infringes a trademark. Shipments can be seized at the border, and the buyer has no recourse for the loss.

FAQ

What does first copy mean?

It is a marketing term for a replica watch. It suggests closeness to the original design. It does not mean the watch is authorized, licensed, or built by the brand.

Can the chronograph be serviced?

Some independent watchmakers will take the job, but parts are the limit. Ask about service access before you buy, not after the watch stops.

Should I expect the same water resistance as the IWC?

No. Without a pressure test from a watchmaker, treat any depth rating as unverified and keep the watch away from water.

Is a quartz version a reasonable choice?

It keeps time and costs less, but the ticking seconds hand and non-functioning totalizer are visible giveaways. Buy it only if you accept those limits.

How do I vet the seller?

Request a live video with a timestamp, ask for references from recent buyers, and confirm the return window and refund method in writing before you send money.