Strap for Portofino Automatic Stainless Steel / Black / Long Milanese

The lug width (also called spring bar distance or strap width) of the IWC Portofino IW3565-10 is 20mm. This measurement represents the distance between the internal edges of the lugs where the strap attaches. Verifying this dimension before purchasing a replacement strap is essential to ensure mechanical compatibility and prevent unwanted movement during daily wear.

Alligator leather with vegetable tanning represents the most authentic and proportionally suitable choice for the Portofino IW3565-10: its regular grain and natural patina enhance the watch's classical identity. Alternatively, anilina calf in tobacco or dark brown tones maintains constructive sobriety, whilst grey or navy-blue rubber offers daily practicality without aesthetic compromise. Shell cordovan would be stylistically excessive for this model.

Strap replacement is performed by carefully manipulating the spring bar pins that connect the strap to the case lugs. Using a spring bar tool, gently depress the pin on one side to release the internal spring, allowing the old strap to slide free. Repeat on the opposite side. The operation demands delicacy to avoid scratching the stainless steel case. If inexperienced, entrust the task to a watchmaker or to Casati Milano atelier.

Yes, completely compatible. The IWC3565-10 accepts any strap with 20mm lug width, provided the strap's constructive quality guarantees stability and longevity. Artisanal straps from milanostraps.it, crafted with premium leathers and hand-sewn construction, offer qualitative choice superior to industrial OEM alternatives whilst maintaining full mechanical compatibility.

A high-quality leather strap (alligator or anilina calf), subject to ordinary maintenance and stored in appropriate conditions, has average durability of 4-6 years with moderate daily wear. Longevity depends upon exposure to moisture, perspiration, UV rays and frequency of use. The watchmaker advises periodic inspection of stitching and application of natural conditioners to maintain leather elasticity. Casati Milano guarantees their straps for 18 months.