Short answer
A fake Portugieser hand wound 40 is usually a 40 mm case built around a hand-wound 6498-style movement, with small seconds at 6 o'clock and a sapphire display back. That combination is the whole story. If the seller can show a case profile near 10.6 mm thick, a dial with crisp printing and applied markers, and a decorated hand-wound movement under the glass, you are looking at the better end of the replica market. If the listing stays vague about the movement, assume a stock undecorated base caliber and price it that way.
Know what the original is first
IWC's 40 mm Portugieser references run the in-house calibre 82200, an automatic with a 60-hour reserve and a 4 Hz beat rate. The hand-wound Portugieser most people picture is the 8 Days, and that one is 43 mm, not 40. So when you shop a "hand wound 40," you are looking at a build that factories assembled to match a size and a look rather than one real reference. That is not a dealbreaker by itself. It does mean you should judge the watch on its own parts instead of trusting a model name.
Case and proportions
- Diameter: 40.4 mm across the bezel is the number to aim for. Ask for a caliper photo. A lot of listings say 40 and ship 41.5.
- Thickness: the real thing sits near 10.6 mm. Anything past 12 mm wears like a different watch and will not slide under a cuff.
- Lug to lug: roughly 47 to 48 mm, with slim curved lugs. Chunky lugs are the easiest tell from a few feet away.
- Strap width: 20 mm at the lugs. If the seller sends a 22 mm strap, the case is not what was advertised.
- Crystal: sapphire, domed, with anti-reflective coating. Cheap ones carry a blue or purple tint that reads as haze in daylight.
Polishing is the other thing I check. The original mixes brushed case sides with a polished bezel and lugs. Replicas often polish everything, which flattens the case and shows scratches fast.
The movement matters more than the logo
Open the caseback photo and look for four things.
- Beat rate. A 6498 base runs at 21,600 vph. The genuine calibre runs at 28,800. In a quiet room you can hear the difference.
- Power reserve. Expect roughly 40 to 46 hours from a decent hand-wound clone. If a seller claims 60 hours on a 6498 base, they are reading IWC's spec sheet back to you.
- Decoration. Geneva stripes, blued screws, and engraving on the bridges signal a higher grade. Plain brass and a stamped plate mean the cheapest tier.
- Subdial position. Small seconds at 6 is correct. The 6498 was designed that way, which is exactly why factories use it.
One catch: the genuine hand-wound references also have a display back, so the finish is not hidden. Anyone can flip the watch over and compare. That pushes better makers to spend real time on the movement side.
Dial, hands, and subdial
Printing is where mid-tier fakes fall apart. Look at the wordmark under 12. Letters should be sharp and evenly spaced, not thick and blurred at the edges. Applied markers should sit flat, catch light on their polished edges, and line up with the minute track. The subdial should be small, sunken, and lightly snailed, sitting clear of the 6 marker.
Leaf-shaped hands carry the classic Portugieser look. On good replicas they are blued or gold-plated with a clean edge. On cheap ones they look painted and the tips are blunt.
Caseback, strap, and small stuff
A sapphire back with clean laser engraving around the rim, a correct reference number, and a snug fit against the case are all good signs. The strap should be alligator or convincing embossed leather with hand stitching, tapering to a pin buckle or deployant that matches the case finish. A loose spring bar, a wobbly crown, or a crown that grinds while you wind are reasons to send it back.
What to ask before you pay
- Caliper photos of diameter and thickness.
- A real photo of the movement, not a stock image.
- Beats per hour and a measured power reserve.
- Lug width and strap material.
- Return policy if the case measures over 41 mm.
Ask those five questions and most weak sellers disappear. The ones who answer with real photos are the ones worth dealing with.