The IW328070 is an IWC Pilot's Watch reference, and the honest answer to how to fake one is that you cannot build a convincing fake at home. The useful question is the reverse: how do you spot one? China-based sellers list IW328070 lookalikes as "1:1" or "super clone," and buyers get burned because they trust that label instead of checking the watch. Authentication comes down to four verifiable things: the reference and serial engravings, the case dimensions, the dial and case finishing under magnification, and the movement. A replica can match one or two of those. Matching all four at the same time is rare.
Prerequisites
- A 10x jeweler's loupe
- Digital calipers
- A scale with 0.1 g resolution
- The official IWC reference listing for the IW328070 open on your phone
- Daylight photos of the dial, caseback, crown, and clasp from the seller
Step-by-Step Authentication
- Pull the official specs first. Look up the reference on the manufacturer's own site and write down case diameter, thickness, lug width, movement caliber, and crystal type. Every check below is measured against that list, never against the seller's description.
- Read the caseback engravings. Genuine reference and serial numbers are cut into the metal with crisp edges and even spacing. Replicas show shallow laser etching, letter gaps that drift, and a font that runs wide or narrow compared with the official mark.
- Measure the case with calipers. Take the diameter at 3 and 9 o'clock and the thickness at the center of the caseback. Replica cases often run 0.3 mm to 1 mm off the original.
- Weigh the watch head without the strap. Genuine cases use the material named in the specs. Replicas often substitute a lighter alloy that shows up in the number.
- Inspect the dial under the loupe. Check the applied indices, the printing of the brand name and the automatic text, and the lume fill. Lume that spills over an index edge or printing with jagged borders is a clear tell.
- Examine the hands and the crystal. Genuine IWC crystals carry an anti-reflective coating on both faces, which shows a faint blue or purple tint when you tilt the watch. Uncoated or single-coated glass looks flat and reflects overhead light as a harsh white sheet.
- Test the crown and the winding. Screw the crown down, then count the turns as you release it. Wind the movement and set the time. A genuine caliber feels smooth and hacks cleanly to a stop.
- Have a watchmaker run the movement on a timegrapher. Rate, amplitude, and beat error readings separate a real caliber from a Chinese clone within minutes.
- Compare the bracelet, strap, and clasp. Check the direction of the brushing on the links, how the end links sit against the case, and the quality of the engraving on the clasp.
- Match the paperwork. The warranty card serial has to match the caseback serial and the movement number. Replica papers often reuse one serial across an entire production run.
- Buy only from a source that accepts returns. Independent authentication costs far less than a bad purchase.
Why "Super Clone" Claims Fail
Replica factories copy what photographs well: the dial layout, the case silhouette, the clasp shape. They cut corners on what cameras do not capture, which means engraving depth, movement finishing, crystal coating, and case alloy. That gap is exactly where an authentication check lands. If a seller refuses close-up photos of the caseback and movement, treat the refusal as the answer.
Red Flags to Walk Away From
- A price far below the market for a used example of the reference
- Seller photos that are stock images or borrowed from a forum post
- No movement photo, or a movement photo shot through frosted glass
- A serial that appears on multiple listings
- Pressure to pay outside a platform with buyer protection