Short answer

IW545113 is an IWC reference number. Listings place it in the 5451 series, a hand-wound dress watch family. IWC does not keep a public spec page for this reference on iwc.com, so case size, dial layout, and movement details come from dealers, not from the factory. Treat any listing spec as unverified until you see photos of the actual watch.

Replica IW545113 watches sell from about $90 to $600. The gap tracks three things: the movement, the case finish, and the dial printing. Ask for caliper photos and a movement photo before payment.

Movement

Hand-wound dress replicas run one of three movements. The Unitas 6497 clone and the 6498 clone both beat at 18,000 vph (2.5 Hz). The Seagull ST36 beats at 21,600 vph (3 Hz). All three wind by hand and give roughly two days per full wind.

The 6497 puts the small seconds hand at 9 o'clock. The 6498 puts it at 6 o'clock. Match the sub-dial position to the dial in the listing photos. A rotor behind a display back on a watch sold as hand-wound is a mismatch.

What buyers check first

  • Case diameter and thickness, measured with calipers. Sellers quote numbers that run 1 mm to 2 mm off.
  • Lug width. Hand-wound IWC dress cases take an 18 mm, 19 mm, or 20 mm strap.
  • Case back engraving. Reference text, serial line, and font weight.
  • Crown size and position. Small crowns on thin dress cases are common.

Dial and case checks

  • Applied metal indices versus printed ones. Higher tiers use applied markers.
  • Printing under a loupe. Look for ink bleed and uneven letter spacing.
  • Hand length. Hour and minute hands should reach the track or the index edge.
  • Crystal material. Ask in writing. Tap tests do not separate sapphire from mineral glass.
  • Winding action. A hand-wound movement should wind with no grit and no slip.

Price bands

  1. $90 to $180: mineral glass, stamped markers, 18,000 vph clone or quartz.
  2. $180 to $350: sapphire glass, applied markers, Seagull ST36 or 6498 clone.
  3. $350 to $600: tighter case finishing, closer dial printing, box and papers.

Red flags

  • Stock photos with no timestamped shot of the watch in hand.
  • "1:1" claims with no measurements.
  • Water resistance claims above 50 m on a $120 watch.
  • Payment by gift card or crypto with no receipt and no dispute route.

Legal position in the United States

A replica IW545113 carries a trademark owned by IWC Schaffhausen. Import and sale of counterfeit goods is illegal in the U.S. U.S. Customs and Border Protection can seize a shipment. The buyer absorbs the loss, and there is no chargeback path on most payment methods these sellers accept. This is a fact of the market, not a warning about one seller.

Steps before you pay

  1. Ask for a photo of the case with calipers on the lugs and the crown.
  2. Ask for a photo of the movement with the case back off.
  3. Confirm crystal material and case size in writing.
  4. Confirm return policy, shipping method, and tracking.
  5. Pay with a method that offers a chargeback.

Unknown points

The exact factory case diameter and dial variant for IW545113 are not confirmed in public IWC material. Dealers list sizes that range from 38 mm to 42 mm. Get the measurement from the seller's photo of the specific watch, not from the reference number.