Answer first: measure the case before you look at anything else
No current IWC Portugieser is 45mm. The Portugieser Chronograph measures 41mm across, the Portugieser Automatic comes in at 42.3mm, and the Perpetual Calendar is 44.2mm. So a watch sold as a "45mm Portugieser" is either a fantasy reference or a generic case with Portugieser styling dropped onto it. That single number reframes the whole comparison, because once the case is wrong, the rest of the watch tends to be wrong in the same direction.
I keep a plastic caliper on the bench for exactly this. Case diameter, thickness, and lug-to-lug tell you more in ten seconds than an hour of squinting at the dial.
fake portugieser 45mm comparison
Case size and thickness
A genuine Portugieser Chronograph runs about 13.1mm thick. The Automatic is a touch over 14mm. Those are slim watches for their diameter, and the proportions are the point. Oversized replicas usually land at 15mm or more because they are built on a stock case that was never designed around a Portugieser dial. On the wrist a 45mm fake reads as a slab, not as a dress chronograph.
Check the lug-to-lug span too. If the lugs stretch far past the case and the strap gaps at the spring bars, the geometry is off.
fake portugieser 45mm cost analysis
Lugs and case flanks
Genuine IWC cases have crisp transitions between the polished bezel and the brushed flanks. The lug tips are sharp enough to catch a fingernail. Fakes get over-polished at the factory, so the edges round off and the brushing washes out under direct light. Run a thumb along the lug edge. Real ones bite a little.
Dial layout and printing
This is where most comparisons get decided. Look at the applied numerals. On a genuine Portugieser they sit proud of the dial with polished bevels, and the railroad minute track is printed thin and even. Fakes usually use thicker paint, softer numeral edges, and lettering that kerfs unevenly. The "IWC" wordmark should be tight and level, not stretched.
The subdial tell on chronographs
The IWC 69355 chronograph caliber is a bi-compax design: running seconds at 6, chronograph minutes at 12, date at 3. Many replicas are built on a Valjoux 7750 pattern, which places a third subdial at 9 o'clock. If your 45mm "Portugieser" has three subdials, the movement is not the movement, and you can stop there.
On the Automatic, the layout is small seconds at 9, power reserve at 3, date at 6. Fakes often get the positions right but shrink the subdials or crowd the date window against the index.
Hands, crystal, and reflections
Portuguese hands are feuille shaped, thin at the base, tapering to a fine point, often blued. Replicas cut them thicker and the blue tends to be a flat paint rather than a heat-treated sheen that shifts as you rotate the watch.
The crystal is another quick test. IWC fits sapphire with anti-reflective coating on both faces, so the dial looks almost suspended and reflections are faint and slightly blue. Cheap fakes run single-sided AR or none at all, and the dial reads milky from an angle.
Movement and caseback
Turn it over. The genuine 69355 shows a column wheel, a vertical clutch, and Geneva stripes with blued screws under a sapphire back. If the caseback is solid steel on a watch that should have an exhibition back, that is deliberate hiding. A 7750-based fake will also wobble on the wrist and whirr when you move your arm, while the IWC caliber winds quietly.
Strap, buckle, and weight
Genuine straps are alligator with a soft, matte hand and even stitching. Replica straps feel plasticky and the stitching sits bright white. The buckle should carry clean engraving, not shallow laser etching. Weight matters too: a 45mm steel fake often feels top-heavy and unbalanced on leather, while a real Portugieser sits flat and settles quickly.
Price and paperwork
Used steel Portugieser Chronographs generally trade in the mid four to low five figures depending on reference and condition. A private listing asking a few hundred dollars for a "Swiss made" example is describing a replica, whatever the ad says. Ask for the movement serial, the warranty card, and service history. Fakes have none of it.
Quick comparison checklist
- Case diameter: 41mm, 42.3mm, or 44.2mm. Never 45mm.
- Thickness: about 13 to 15mm, not 16mm or more.
- Chronograph subdials: two, at 12 and 6. A third at 9 means a 7750.
- Hands: fine feuille profile, heat-blued, not painted.
- Crystal: double AR, dial looks open, not cloudy.
- Caseback: sapphire, column wheel and striped finishing visible.
- Strap: real alligator, tight stitching, crisp buckle engraving.