Short answer
There is no documented IWC Portofino with a 33 mm case and a small seconds subdial. IWC catalogs the Portofino Automatic 34 with a 34 mm case and central seconds, and the Portofino Hand-Wound with small seconds at 6 o'clock in larger cases. Listings that use the phrase "Portofino small seconds 33" describe a replica. The diameter and the subdial layout match no confirmed IWC reference.
What the genuine line uses
- Portofino Automatic 34: 34 mm case, automatic movement, central seconds.
- Portofino Automatic 37: 37 mm case, central seconds, date at 3.
- Portofino Hand-Wound: 45 mm case, small seconds at 6, power reserve at 3.
IWC does not publish a 33 mm Portofino. A spec sheet that claims one is not sourced from the brand.
Legal status in the United States
Counterfeit watches are illegal to sell and illegal to import for resale. 18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime. 19 U.S.C. § 1526 lets U.S. Customs and Border Protection seize and destroy infringing imports. Civil damages under the Lanham Act can reach statutory per-item amounts.
Points that separate the two
- Movement: replica Portofino pieces carry generic Asian automatic or quartz movements. IWC uses in-house or modified Swiss calibers.
- Serial number: a counterfeit case number returns no record from IWC service.
- Service: IWC does not repair or authenticate counterfeits. Parts are generic.
- Resale: counterfeit watches have no lawful resale channel in the U.S.
If you already own one
A watchmaker can measure case diameter and identify movement type to confirm what the piece is. Beyond that, nothing about a counterfeit is verifiable. It cannot be serviced with factory parts and it cannot be sold through a licensed dealer.
Unknowns
No public IWC catalog entry matches "small seconds 33." If such a reference exists, IWC does not list it, and no independent record confirms it.