Short answer

Counterfeit IWC IW371445 watches exist and appear on auction sites and social media. The IW371445 is a stainless steel Portugieser Chronograph with a silver-plated dial, gold-plated hands, and caliber 79350 inside. Replica sellers charge $80 to $600 for copies. A genuine example trades for $4,000 to $6,500 on the secondary market. A price below $2,000 means the watch is not real.

Reference facts

Check any candidate against these numbers before you look at the dial.

  • Case: stainless steel, 40.9 mm diameter, about 12.3 mm thick
  • Lug width: 20 mm
  • Crystal: sapphire, antireflective coating on both faces
  • Water resistance: 3 bar, or 30 m
  • Movement: IWC caliber 79350, a modified Valjoux 7750, 28,800 vph, 44-hour power reserve
  • Dial layout: chronograph minutes at 12, small seconds at 6, date at 3
  • Strap: brown Santoni alligator leather with a steel pin buckle
  • Status: discontinued. Later Portugieser Chronographs use the in-house 69355 caliber.

Tells on a counterfeit

  • Subdial function. On a quartz fake the 6 o'clock subdial ticks one step per second. On caliber 79350 it sweeps.
  • Hands. Originals use gold-plated leaf hands. Copies show painted hands, rough edges, or the wrong shade.
  • Dial print. Compare the IWC wordmark, the Schaffhausen line, and the subdial rings against a photo of a known original.
  • Caseback. Look at engraving depth, font, and the reference number. Some copies misspell Probus Scafusia or print the wrong reference.
  • Pusher feel. A 7750-based movement starts and resets with a firm click. Quartz pushers travel with no resistance.
  • Date wheel. The date text sits centered in the window on an original. Copies often sit high or left.
  • Strap and buckle. Santoni alligator has visible scale structure and a stamped IWC buckle. Copies use embossed cowhide.
  • Weight. A steel case with an automatic movement feels dense. Many copies use plated brass and feel light in the hand.

Verification steps

  1. Ask for the serial number and reference number, then request a photo of the caseback engraving.
  2. Ask for a photo of the movement if the caseback is a display back. If the seller refuses, stop.
  3. Compare every photo against an original listed on a dealer site.
  4. Ask for service papers, box, and the original purchase receipt. Missing papers plus a low price is a warning.
  5. Meet at an authorized dealer or a watchmaker for a movement check before you pay. Expect to pay $75 to $150 for the inspection.
  6. Pay with a method that offers a refund. Bank transfer offers no protection.

Prices

Replica sellers list IW371445 copies from $80 to $600. Higher tiers use a Chinese copy of the 7750 with a decorated rotor. Those watches still fail on finishing, engraving, and case tolerances. Genuine IW371445 listings sit between $4,000 and $6,500, and the range depends on box, papers, and service history. Service for caliber 79350 costs several hundred dollars, and the factory does not service counterfeit movements.

If you bought a fake

Contact the seller in writing and ask for a refund. File a claim with your card issuer or payment platform. Report the listing to the platform. Keep the photos and the chat log. An IWC boutique or authorized service center can tell you whether a serial number matches factory records, but IWC does not issue written authentication for private sales in most cases.