Strap for Portofino Automatic / Yellow Gold / White / Strap

The lug width of the IWC Portofino IW3533-07 is 20 millimetres. This dimension is the historical standard of the Portofino family and remains rare in contemporary watch catalogues. Measurement should be taken between the metal pins connecting the strap to the case lugs, ensuring millimetre precision.

Alligator leather in vegetable tanning represents the natural choice: its fine grain respects the case sobriety, and the patina developing over years complements the warmth of gold without competing visually. Alternatively, vitello box in cognac or tobacco tones offers more pronounced texture whilst maintaining formal construction standards.

Strap replacement requires a spring bar tool (small implement with bifurcated tip): position the tip beneath the metal pin from inside outward, apply light pressure to release the spring, extract the old pin, insert the new one into the new strap, then reinsert into the case. Each operation must be executed carefully to avoid damage to the yellow gold case.

Yes, provided it strictly respects the 20mm lug width specification. Straps of 18mm or 22mm are not interchangeable: the former does not guarantee correct structural retention, the latter irreversibly compromises the aesthetic balance of the watch. It is advisable to purchase from specialised suppliers who certify compatibility.

A quality artisanal alligator or vitello strap with vegetable tanning typically resists 5–8 years of daily use, depending on climate, solar exposure and humidity. The leather develops a natural patina that enhances its aesthetic character. Restoration or suture replacement are always possible through specialised craftsmen, extending the functional life of the strap.