Short answer: a fake IW328013 lives or dies on four things. Case finishing between the lugs, the crispness of the dial print, the date window alignment, and the caseback engraving. I check those before anything else, because they are the cheapest places for a factory to cut corners and the hardest places to hide it. If those four hold up under a loupe, the rest of the watch is usually worth a closer look.

Why this reference gets copied so often

A clean three-hander with a date is the easiest kind of watch to reproduce at 80 percent accuracy. Flat brushed surfaces, a simple dial, a printed minute track. Nothing there requires the tooling that a chronograph or a skeleton needs. The last 20 percent is where the money goes, and that is exactly where cheap replicas fall apart. So the question is not whether a fake IW328013 exists. It is which tier you are looking at.

Pull the official spec sheet for IW328013 from IWC before you compare anything. Case diameter, lug width, dial variant, and strap options shift across sibling references, and a replica that is 1mm off is a different watch, not a small error.

The inspection list I actually use

• Case finishing. Run a fingernail along the lug bevels. Sharp, consistent transitions on the genuine. Soft, rounded, or wavy on a bad fake. Look at the junction between brushed flanks and polished edges under raking light.
• Dial print. Under 10x, the text should sit crisp and slightly raised with clean edges. Cheap replicas show bleeding, uneven stroke weight, or letters that look painted on with a brush.
• Date window. The aperture should be cut clean with sharp internal corners, and the disc should sit level, centered, and flush. A sunken or tilted disc is a tell.
• Hands and lume. Check the hand stack height and the bevel on each hand. Lume fill should be level with the frame, not domed or pitted.
• Caseback engraving. Depth and sharpness of the lettering, plus the reference number format. Laser engraving on fakes often looks shallow and grey rather than cut.
• Crown and tube. Threads should engage smoothly with no grit. The logo relief should be crisp, not a soft blob.
• Bracelet or strap hardware. End link fit, screw heads, clasp engraving, and how the clasp closes. Rattly clasps are common on budget builds.
• Movement behavior. Listen to the beat. A smooth 28,800 vph sweep versus a stuttering 21,600 is a quick sanity check. Then feel the winding and listen for rotor noise.
• Dimensions and weight. Calipers and a scale do not lie. Ask for numbers before you ask for opinions.

What the good fakes still get wrong

Movement finishing and the small geometry. Rotor decoration on replicas tends to be stamped or printed rather than applied, and the perlage or Cotes de Geneve is coarser. Caseback thread engagement is another one. Genuine cases screw down with a smooth, even resistance. Copies often feel tight at one point and loose at another, and that unevenness shows up again after a few months of use.

Red flags in a listing

Stock photos with no macro shots of the dial and caseback. A price well under the rest of the market for the same tier. Sellers who cannot tell you the movement inside or the case dimensions. "1:1" used as a complete answer to every question. And any listing that shows a genuine watch in the photos while shipping something else. Ask for dated, in-hand pictures of the actual piece with the crown pulled and the caseback visible.

The money question

Replica pricing tracks finishing and movement, not the badge. Two fake IW328013 watches can differ by several hundred dollars and the gap shows up in exactly the places listed above. Paying more does not guarantee quality, but paying the floor price almost always means soft bevels, flat print, and a movement that will need service inside a year.

Quick answers

Can a fake IW328013 pass as genuine on the wrist?

From a meter away, a good one can. In the hand, with a loupe, no. Case finishing and dial print close the gap faster than anything else.

What should I ask a seller first?

Case dimensions, movement name and beat rate, and dated photos of the actual watch. Vague answers are the answer.

Is the serial number a reliable check?

No. Serial numbers get copied. Check engraving depth and font consistency instead, and compare against IWC's own reference images.