When you shop for a fake IW323721, focus on the dial and case first. A good replica of the IWC Portuguese Chronograph gets the 40.9mm case diameter, the slim bezel, and the two subdial positions right. Movement decoration matters less because you rarely see it. If the dial printing looks flat or the subdials sit at the wrong angle, walk away.

What to Look For

Start with the case. The original IW323721 has a stainless steel case with polished and brushed finishes. Check that the replica matches the shape of the lugs and the crown guards. The crown should sit flush against the case and have the correct IWC logo. Next, examine the dial. The silver-plated dial on the genuine watch has applied gold numerals and hands. A quality replica will use applied markers, not painted ones. The subdials at 12 and 6 should be recessed slightly and have fine concentric circles. Look at the date window at 3 o'clock. The font must match the original, with no thick or blurry numbers. Finally, check the crystal. It should be sapphire or a good mineral glass with an anti-reflective coating. A cheap plastic crystal will scratch and look cloudy.

Parameter Bands

Use these tolerances to judge a replica. Case diameter should be within 0.3mm of 40.9mm. Thickness should be between 12.0mm and 12.6mm. If it is over 13mm, the case is too fat. Lug width must be 20mm so standard straps fit. The subdial spacing from the center should match the original. Weight should feel substantial, around 80 to 90 grams with a leather strap. A watch that feels light or hollow is a warning sign. The chronograph pushers should have a crisp click and reset to zero without lag.

Common Pitfalls

• Photos that hide the thickness or the caseback. Ask for a side profile shot.
• Sellers who use genuine watch photos. Reverse image search the pictures.
• No return policy or no real customer photos. A reputable seller shows actual stock.
• Movements that are loud or have a rough winding feel. The original calibre 79350 is smooth.
• Dial text that is too bold or too thin. Compare letter spacing to official images.

FAQ

Is a fake IW323721 worth buying?

It depends on your goal. If you want the look of a Portuguese Chronograph without the genuine price, a high-quality replica can work. But low-end versions look wrong on the wrist. Spend more for better dial and case accuracy.

How can I tell a good replica from a bad one?

Zoom in on the dial. Check the subdial rings, the date font, and the hand finish. Then look at the case sides. Sharp edges and uneven brushing are signs of a cheap build.

Which movement should a replica IW323721 have?

Most replicas use a clone of the Valjoux 7750 or a custom automatic chronograph. A smooth sweep and a reliable reset matter more than the name on the rotor.