Strap for Portofino Automatic / Stainless Steel / White / Strap

The IWC Portofino IW3533-23 has a precise lug width of 20mm. This dimension is determined by the geometry of the 38mm case and must be respected rigorously: straps of 19mm or 21mm cause excessive play or insertion difficulties. Correct measurement is performed by placing a ruler on the inside of the lug from wall to wall, without pressure.

Alligator remains the classic choice for the IW3533-23: tanned leather with regular scales and natural patina developing over time, conferring progressive chromatic depth. Alternatively, vegetable-tanned calf leather offers daily versatility with more pronounced texture, whilst shell cordovan represents the pinnacle of structural density. For sporting contexts, rubber straps bonded to Nylon fabric maintain the technical tone of the brushed stainless steel case.

Remove the watch lugs using a spring bar tool: insert the flat end into the lateral hole, lift to decompress the spring, extract the pin. Repeat on the other side. Subsequently, insert the new 20mm strap aligning the holes to the lugs, reinsert the pins maintaining spring compression until complete engagement. Verify that the strap is securely fastened, completing no movement until total lock.

Yes, any aftermarket strap with a 20mm lug width is compatible with the IW3533-23, provided it is constructed with millimetre precision. Beware of straps promising universal compatibility through constructive workarounds: the IWC case requires stringent tolerances. Artisanal brands specialising in Italian leather guarantee invisible wear and compromise-free fit.

Durability depends on leather quality, intensity of wear and maintenance. Premium alligator, worn daily in moderate environment, lasts 3-5 years maintaining structural integrity; vegetable-tanned calf resists 2-4 years, shell cordovan 5-7 years thanks to natural density. Conditioning the leather periodically with natural waxes and protecting it from humidity and UV rays significantly prolongs longevity.