Short answer

"Portofino 29" is not an IWC reference number. IWC numbers its Portofino watches with an IW prefix, such as IW3565 or IW4586. The number 29 does not appear as a model code in any IWC catalog. On replica seller pages the same string works as an internal product or batch number for one factory listing. Two sellers can use "29" for two different watches.

Portofino references that do exist

  • Portofino Automatic 37, reference IW4586. Case diameter 37 mm.
  • Portofino Automatic 40, reference IW3565. Case diameter 40 mm. Self-winding calibre varies by production year.
  • Portofino Chronograph, reference IW3910 at 42 mm, and the later 39 mm IW3914.
  • Portofino Hand-Wound Eight Days, reference IW5101. Case diameter 45 mm. Calibre 59210 with an eight-day power reserve.

The line started in 1984. IWC named it after the Italian village on the Ligurian coast. Retail for a Portofino Automatic sits near 5,000 to 6,500 USD. The Hand-Wound Eight Days runs higher.

Movement tiers sold as Portofino copies

Replica listings group into three tiers. The low tier holds quartz movements and basic Asian automatics. The mid tier holds Asian copies of the ETA 2824 and 2892. The top tier holds Swiss ETA movements or modified units sold as Swiss made. A watch that runs at 28,800 vibrations per hour, or 4 Hz, matches the beat rate of the calibres used in the genuine Portofino Automatic.

Checks on a physical watch

  1. Read the caseback engraving under a loupe. Reference numbers on genuine cases show sharp edges and even depth.
  2. Check the date wheel font against the dial printing. Mismatched fonts are a common fault.
  3. Time the power reserve. Most Portofino Automatic calibres hold about 42 hours.
  4. Look at the crown logo. A stamped logo with soft edges differs from the applied relief on genuine crowns.
  5. Inspect the sapphire crystal for anti-reflective coating on both faces.

What is not known

No public registry maps replica batch codes such as "29" to a factory, a movement, or a date. Seller pages do not publish serial data. Any claim that ties "Portofino 29" to one specific watch cannot be confirmed from open sources.