Answer first

IW5448 is a reference number in IWC's classic model range. I could not find a current IWC catalog entry for IW5448, so the number works as a seller label more than a spec sheet. Replica sellers attach it to a watch built around a Chinese movement, a steel case, and a dial printed from photos of the real model. Two IW5448 listings from two sellers can hold different movements and different case sizes. Ask for a movement photo before payment.

What IWC reference numbers mean

IWC numbers its watches by caliber family and case. The Portuguese line carries references in the 3714 block for the chronograph and the 5001 block for the automatic. Case sizes run 40.9 mm to 42.3 mm. Movements include caliber 79350, a Valjoux 7750 base, and caliber 51010, an automatic with a 7-day power reserve. A buyer who needs the exact build of IW5448 should ask IWC or a dealer with archive access. Replica sellers copy the outside, not the movement.

Movements used in replica IW5448 builds

  • Asian 7750: copy of the ETA 7750. Runs at 28,800 vph. Sits in chronograph versions.
  • Seagull ST19: hand-wound column wheel chronograph from Tianjin Seagull. Runs at 21,600 vph.
  • Seagull ST25 and Hangzhou 6300: automatic three-hand. 38 to 42 hours of reserve.

The IWC caliber 51010 winds on a Pellaton system and runs 7 days, or 168 hours, on a full wind. No replica in the $150 to $400 band matches that figure. Ask the seller for a power reserve number and a photo of the rotor and bridges.

Checks on the case, dial, and crystal

  • Caseback: laser etching sits flat with no burr. Milled engraving has depth.
  • Dial text: "IWC" over "Schaffhausen". Look for filled letters and wide spacing.
  • Crystal: sapphire with an anti-reflective coat shows a blue or purple sheen at a 30 degree tilt. Mineral glass shows a white reflection.
  • Hands: painted hands chip at the tip. Blued steel shows a grain.
  • Date window: check the font weight and the gap to the dial edge.
  • Strap: alligator print at the $100 tier, leather at $300 and up.
  • Weight: a steel case with a strap runs 90 g to 110 g.

Price tiers

  • Under $100: mineral glass, printed dial, unbranded movement.
  • $150 to $300: sapphire, decorated rotor, Asian 7750 or ST19.
  • $350 to $600: "super clone" label, better brushing, closer dial print.
  • Above $600: markup. Materials do not change.

Wholesale lots reported by buyers run $40 to $120 per unit at 20 to 50 pieces. Shipping adds $15 to $40 per parcel. Seizure risk at the border sits with the buyer.

Legal note for US buyers

18 U.S.C. 2320 covers trafficking in counterfeit goods. A first conviction carries up to 10 years in prison. U.S. Customs and Border Protection seizes counterfeit watches at ports and destroys them. IWC and its parent Richemont hold trademarks on the name, the logo, and the "Probus Scafusia" motto. A purchase from a foreign seller transfers no right to resell.