The replica IW371660, a copy of the IWC Portugieser Chronograph, varies in quality. Your best move is to ignore marketing photos and inspect specific details: case diameter, dial printing, subdial spacing, and the movement inside. A good replica will match the original's 41mm width and 13.1mm thickness, use a reliable chronograph movement, and show crisp applied indices. A poor one will have wrong proportions, fuzzy text, or a noisy quartz tick. Use this guide to separate the two.

What to look for in a replica IW371660

  • Case dimensions: The genuine Portugieser Chronograph IW371660 measures 41mm across and about 13.1mm thick. Replicas may run larger or thicker. Check these numbers.
  • Dial details: The original has a silver-plated dial with two recessed subdials at 12 and 6 o'clock. Replica dials may have flat subdials or wrong spacing. Look for sharp printing on the "IWC" logo and "Schaffhausen" text.
  • Movement: The real watch uses an IWC caliber 79350 (modified Valjoux 7750). Replicas use a Chinese clone of the 7750, a Seagull ST19, or a quartz. A mechanical chronograph should have a smooth sweeping seconds hand and a crisp pusher feel.
  • Crystal: Genuine uses sapphire with anti-reflective coating on both sides. Replicas may use mineral glass or single-sided AR. Check for a blue tint or lack of clarity.
  • Case back: The IW371660 has a solid case back with engraving. Replicas may have shallow or misaligned engraving.

Parameter bands for quality tiers

Replica quality falls into rough bands. Use these as a checklist, not a price guide.

  • Low tier: Quartz movement, 40mm or 42mm case, wrong subdial positions, printed logo that smears. Avoid.
  • Mid tier: Seagull ST19 or Asian 7750, 41mm case but 14mm+ thick, decent dial but weak lume. Acceptable if price is low.
  • High tier: Asian 7750 with proper 13.1mm thickness, sapphire crystal, correct dial texture, good engraving. Closest to genuine.

Pitfalls to avoid

  • Trusting "1:1" or "super clone" labels without seeing real photos. Ask for a video of the actual watch.
  • Ignoring movement service needs. A cheap 7750 clone may run fast or stop. Factor in a service.
  • Buying from a seller who does not show the case back or movement. Insist on both.
  • Overlooking strap quality. Genuine comes on alligator leather. Replicas may use cheap embossed leather.
  • Assuming all IW371660 replicas are the same. Different factories make different versions.

FAQ

Is the replica IW371660 worth buying?

Only if you accept it is not a genuine IWC. A high-tier replica can look convincing on the wrist, but it will not hold value or have the same movement finishing.

What movement should I expect?

Most mechanical replicas use a Chinese 7750 clone. Some use a Seagull ST19. Quartz versions exist but feel wrong because the chronograph seconds hand ticks.

How can I tell a good replica from a bad one?

Check the case thickness (should be near 13.1mm), subdial spacing, dial printing sharpness, and the sound of the rotor. A good one winds with a smooth feel and has a solid pusher click.