Strap for Portofino Chronograph MecaQuartz Stainless Steel / Silver

The lug width of the IWC Portofino IW372401 is 20 millimetres. This dimension is standard for the 38mm model and is measured internally between the two lugs. It is essential to verify this measurement before purchasing an aftermarket strap to ensure perfect compatibility.

The most coherent strap choice for the Portofino is alligator with vegetable tannage, which respects the watch's formal elegance without competing visually with the dial. Alternatively, smooth calf leather in dark brown offers sophistication with natural patina development over time. The choice depends on usage context: formal requires alligator or calf, casual-sport prefers NATO or rubber.

Changing the strap on the IW372401 requires a spring bar tool. Position the watch on a soft surface, gently press the internal spring bar with the tool until the lug retracts from the slot. Repeat for the other lug. For installation, insert the new lug into the hole, ensuring the spring bar anchors completely. It is advisable to seek professional assistance the first time.

The original IWC strap is assembled internally with certified premium leather and in-house construction with rigorous quality control standards. A compatible aftermarket strap of comparable quality offers the same dimensions (20mm), equally noble materials, and artisanal construction, often with greater customisation options (length, initials, buckle). The main difference is price and freedom of material choice.

A high-quality leather strap with certified vegetable tannage typically lasts 2-3 years under regular daily use. Durability depends on usage: if worn regularly in dry climates, the leather develops patina and remains functional longer. In humid climates or if constantly exposed to water, strap lifespan is reduced. An 18-month warranty is standard for high-end artisanal straps.