Replica IW329048 copies an IWC Aquatimer Automatic 42. The genuine watch uses a 42 mm stainless steel case, a sapphire crystal, a screw-down crown, and water resistance rated near 300 m. IWC builds the watch in Schaffhausen. Replicas come from workshops in China. No replica part comes from IWC.

What the reference number covers

IWC reuses one reference across dial and strap versions. IW329048 can sit on more than one configuration, so match dial color, hand set, and strap against photos of the genuine piece before payment. If a seller cannot show the dial next to the reference number, treat the listing as unverified.

Movement tiers by price

  • $180 to $300: Asian automatic, often a Seagull ST2130 or a Miyota 9015. Rate: plus or minus 15 to 25 seconds a day.
  • $350 to $600: a clone of the ETA 2824 or the Sellita SW200. Rate: plus or minus 10 to 20 seconds a day.
  • $600 and up: Swiss ETA 2824-2 or Sellita SW200-1. Rate: plus or minus 5 to 12 seconds a day. Service runs $150 and up.

Ask for a timegrapher photo. The printout shows rate, amplitude, and beat error.

Case and dial checks

Measure the case with calipers. The reading should land at 42.0 mm to 42.5 mm, crown excluded. Weight falls between 140 g and 175 g on a rubber strap. Check four points:

  1. Crystal coating. Genuine sapphire gets an anti-reflective coat on both faces. A blue or purple tint on the outside face is a common replica tell.
  2. Dial print. Inspect the IWC logo, the automatic line, and the date font. Thin or fuzzy print is a reject.
  3. Crown threads. Turn the crown in and out ten times. Gritty threads strip inside a few months.
  4. Case back. Engravings should sit inside a clean circle. Laser etching looks gray and flat.

Water resistance and legal risk

Replicas ship without tested gaskets. Do not swim with one. A watchmaker can pressure test a case for about $40. Most replica gaskets fail at 3 to 5 bar.

US Customs can seize counterfeit watches. Importing stock for resale carries fines. Used genuine Aquatimer Automatic 42 watches trade between $2,500 and $4,000 on the secondary market. That is 4 to 8 times the price of a top replica, and the real watch holds value.