Strap for Portofino Hand-Wound Big Date White Gold / Laureus Charity Night Milano 2016

The lug width of the IWC Portofino IW5161-04 is 22mm. This measurement is critical for selecting a compatible strap. The 22mm distance between the lugs must match the strap dimensions precisely to ensure proper fitment and visual balance on the 45mm white gold case.

The optimal choice for the Portofino IW5161-04 is a Mississippi alligator strap in deep black or cigar brown, offering a fine grain and a patina that develops beautifully over time. This respects the formal nature of the white gold case. Excellent alternatives include black French calfskin with vegetable tanning, shell cordovan in mahogany for an artisanal aesthetic, or high-quality anthracite rubber for less formal occasions.

Strap replacement is performed by extracting the spring bars—small horizontal pins located at the case lugs—using a dedicated spring bar tool. Once removed, the old strap is detached and the new 22mm strap is carefully inserted, ensuring both ends are properly anchored in the lug holes. This procedure requires precision to avoid scratching the white gold; alternatively, a specialist at Casati Milano can perform the operation with professional care.

Yes, absolutely. Quality 22mm aftermarket straps—such as those offered by Milano Straps—are fully compatible with the Portofino IW5161-04 and provide an excellent opportunity for personalisation. They offer the same structural reliability as official IWC straps, whilst allowing you to select from a broader range of materials, colours, and finishes, including custom options with integrated deployante clasps.

A high-quality leather strap—such as alligator, vegetable-tanned calfskin, or shell cordovan—typically lasts 3–5 years with moderate daily wear. Longevity depends on usage frequency, sun exposure, humidity, and maintenance practices. A strap cared for with appropriate treatments and dried properly maintains its elasticity longer. Milano Straps offers an 18-month warranty and provides replacement and restoration services through Casati Milano.