The short answer is that "fake Portofino Automatic 46" is a search label, not a model name. No factory stamps that name on a box, and the number in the title usually reflects a seller's tape measure rather than a catalogued Portofino reference. The top pick for most buyers is a mid-tier automatic build whose measured case diameter matches whatever reference the seller actually names, confirmed with a caliper photo and a movement photo before payment. Judge any listing on six points: measured case size against the real reference, movement type and finishing, dial printing and index alignment, case and bracelet finishing, strap and clasp hardware, and your own legal exposure where you live.

What the Label "Portofino Automatic 46" Usually Means

IWC builds the Portofino as a thin dress watch. The Automatic references that trade most often on the secondary market sit in the 37 to 40 mm range, while the larger Portofino cases tend to be hand-wound or chronograph versions. That gap matters. When a listing leads with "46," it is often describing a fantasy size, a chronograph case, or a seller's own measurement of a cushion-shaped case that reads wide on the wrist. Ask for a photo of the case next to a ruler or caliper. A seller who will not send one is telling you something.

Option 1: High-Tier Clone Builds

These are the builds where the maker copies a specific reference number and gets the case profile, dial layout and bracelet taper close to the original.

Pros

  • Case profile and lug curve usually match a real reference, so the watch sits correctly on the wrist.
  • Dial printing, applied indices and date window placement tend to be clean.
  • Often fitted with a serviceable automatic movement that a local watchmaker can regulate.

Cons

  • Highest cost of the three tiers, and the gap between tiers is not always visible in listing photos.
  • Sellers sometimes borrow high-tier photos to move mid-tier stock, so you must confirm the actual unit.

Option 2: Mid-Tier Builds (Top Pick for Most Buyers)

This is the sensible middle. You get a recognisable Portofino silhouette, an automatic movement, and a case size you can verify, without paying for details nobody sees across a table.

Pros

  • Best balance of appearance, mechanical reliability and price.
  • Movement is usually a common automatic calibre with parts and service available.
  • Easier to replace a strap or fix a clasp than on a budget build.

Cons

  • Case finishing on the flanks can be softer than the original, which shows under harsh light.
  • Dial text and subdial spacing may drift from the real reference.

Option 3: Budget Builds

Cheap, plentiful, and best treated as a costume piece rather than a watch you rely on.

Pros

  • Low entry cost if you want the look for a single event.
  • Widely available, so you can compare several units before buying.

Cons

  • Quartz or low-grade automatic movements, rough crown action, and plating that wears through.
  • Case sizes are often invented, which is where the "46" label usually comes from.

Verification Checklist Before You Pay

  1. Get the exact reference number the seller claims to copy, then check that reference's real diameter and movement on the brand's own site.
  2. Request a caliper photo of the case at 12 to 6 and at 3 to 9. Lug-to-lug matters more than diameter for fit.
  3. Ask for a clear movement photo, including the rotor and any engraving, plus a short video of the seconds hand sweeping.
  4. Check dial printing with a macro shot: font weight, spacing, and index alignment at 12.
  5. Confirm strap material, clasp type and whether the buckle is signed.
  6. Agree on a return window and pay through a method that gives you a dispute route.

Legal and Practical Reality

Counterfeit watches carrying a protected trademark are illegal to sell in the United States and most of Europe, and enforcement actions target buyers as well as sellers in some cases. Customs seizures are common on cross-border shipments. Set your expectations accordingly, and understand that a watch sold as a replica has no manufacturer warranty, no authorised service, and limited resale value.

Which Build Fits Your Use Case

If you wear the watch to work and want it to survive daily life, take the mid-tier automatic with a verified case size. If you already own a watchmaker's contact and want the closest visual match, the high-tier build earns its cost. If you need the Portofino look for one evening and nothing more, a budget build is enough, provided you accept that the "46" in the title is marketing rather than measurement.