Short answer
There is no "1:1" Portofino small seconds. The watch sellers mean by "small seconds 33" is almost always a copy of the IWC Portofino Automatic 34, the 34mm dress watch with a subdial at 6 o'clock. The number in the listing is usually case diameter in millimeters, and sellers round it, guess it, or copy it from another listing. A replica is a copy, and the gap between the copy and the real watch shows up in the case profile, the dial printing, the movement, and the paperwork. If a seller says "super clone," read that as marketing shorthand rather than a spec.
What the real reference looks like
Portofino is IWC's entry dress line: thin bezel, clean dial, leaf-shaped hands. The small seconds version has a subdial at 6 and no date at 3. Before comparing anything, pull the reference off IWC's own product page and note the case size, dial layout, and strap options. That page is your baseline. Anything a listing claims that contradicts it is the listing's problem, not the watch's.
Where replicas fall apart
- Case finishing. Real Portofino cases have a tight line between brushed flanks and polished bezel. Copies blur that line or polish the whole case.
- The subdial. Position, diameter, and hand length are the hardest parts to copy. On most replicas the subdial sits slightly high or low, and the small hand is either too long or too stubby.
- Dial printing. Weight and spacing of the brand name, the town name, and the word under it. Under a loupe, replica printing looks softer at the edges.
- Movement. A clone runs a generic automatic, often with a decorated rotor meant to look Swiss. Beat rate, winding feel, and power reserve give it away. A watchmaker can tell in two minutes.
- Hardware. Buckle engraving depth, tang shape, and strap stitching are low-cost items for a factory, and it shows.
How to check one in hand
- Measure the case with calipers. If it does not match the reference, stop there.
- Look at the subdial at 6 with a loupe and compare hand length to the official photo.
- Turn the crown. Gritty action and a short stem are common on copies.
- Ask for the reference number and warranty card, then match the reference to the case size. Mismatches are the most common tell on resale listings.
- Have a watchmaker open the back. Movement markings and finish settle it.
Legal and practical risk
Trafficking in counterfeit goods is a federal crime in the US under 18 U.S.C. 2320, and CBP seizes counterfeit watches at ports of entry every year. On the practical side: no manufacturer warranty, no service from the brand, parts that do not interchange with anything, and resale value near zero. If a listing promises Swiss movement and perfect accuracy, ask which movement and who services it.
The alternative
If you want the look, buy a used real one or a small-seconds dress watch from a brand priced below IWC. Both hold value and both can be serviced. That is the whole tradeoff.