Short answer
A fake Portofino Automatic 37 succeeds or fails on three things: case thickness, dial printing, and the date wheel. Get those right and the watch reads as a slim dress piece from across a table. Get them wrong and it looks like a copy before anyone reads the brand. The real IWC is a 37mm three-hand watch, about 9.4mm thick, with a clean dial and a small date at 3 o'clock. Good replicas copy the proportions first and the logo second. Cheap ones do it the other way around.
Know the real watch before you judge a copy
You cannot grade a replica without the numbers in your head. The Portofino Automatic 37 is the smaller sibling of the 40mm Portofino, aimed at wrists that find the larger case clumsy under a cuff. Key figures to memorize:
- Case diameter: 37mm, lug width around 18mm
- Case height: roughly 9.4mm, and this is the number most fakes miss
- Water resistance: 5 bar
- Crystal: sapphire, slightly domed, with antireflective coating on both sides on most references
- Movement: automatic, the 35111 family on older references, newer calibres with a longer power reserve on recent ones
- Dial: applied baton markers, leaf or baton hands, date aperture at 3
Commit the 9.4mm to memory. It is the single fastest filter you have.
The five checks I run first
1. Case thickness and profile
A thin dress watch is hard to fake. Slab a 12mm case onto a 37mm dial and the side profile gives it away, especially when it sits on a desk. Ask for a side photo next to a ruler or a coin. If the seller only shows top-down shots, that tells you something.
2. Dial printing
The words IWC Schaffhausen and Portofino Automatic sit in a specific weight and spacing. On weak copies the text is too bold, too spaced out, or printed slightly high. Use a macro shot and compare letter shapes, not just whether the words are present. The applied markers should sit flat and catch light evenly. Wobbly markers with visible glue are a hard no.
3. The date wheel
Look at the font of the numerals and how they sit in the window. Genuine date printing is thin and centered. Many replicas use a fat, slightly off-center font, or the window edge is cut rough. If the seller shows the 28th or the 8th, that is usually deliberate, since those are the digits that expose a bad wheel.
4. Caseback engraving
The Portofino 37 has a solid or exhibition back depending on reference. Either way, the engraving should be crisp and shallow, not stamped deep and blurry. Reference numbers and serials should look laser-etched rather than scratched.
5. Strap, buckle, and feel
Most first copy watches ship with stiff leather and a flimsy tang buckle. The clasp is where factories cut corners, so budget for a strap swap. A decent alligator-grain strap in the right taper does more for the illusion than any dial tweak.
Movements you will actually find
Inside a replica Portofino 37 you will mostly see a Miyota 9015, a Chinese clone of an ETA or Sellita, or an unbranded automatic. The Miyota is the safer bet. It is thin, reliable, and easy for any watchmaker to service. A clone movement can be fine too, but parts sourcing is a gamble. Ask which movement is inside and whether the seconds hand sweeps smoothly without stutter. A hesitant sweep usually means a cheap oscillating weight and a short life.
What no replica gets right
Hand finishing on the movement, the exact tone of the rhodium plating, and the feel of the crown when you wind it. These are the tells that only show up in hand. If you plan to wear the watch, that is fine. If you plan to resell it as genuine, stop, because that is fraud and it is a different conversation entirely.
Buying checklist
- Confirm case thickness with a photo, not a description
- Request macro shots of the dial text and the date window
- Ask for the movement name in writing
- Check the caseback engraving quality
- Budget for a strap upgrade from day one
- Compare at least three sellers before paying
A good fake Portofino Automatic 37 is a $150 to $350 watch, depending on movement and finishing. Above that you are paying for a name the watch does not have. Below that you are buying a paperweight with a rotor.