Strap for Portofino Chronograph MecaQuartz Yellow Gold / White / Bracelet

The lug width of the IWC Portofino IW9551-01 is 18 millimetres. This is the internal distance between the two attachment pins on the case. Measuring the lug width correctly is essential: using a strap of incorrect width causes forced fitting that damages both the case and the strap.

For the Portofino IW9551-01 in yellow gold we recommend alligator in dark brown tones, red-burgundy shell cordovan, or vegetable-tanned calf leather. The choice depends on usage: alligator for formal settings, shell cordovan for a sophisticated statement, calf leather for everyday lightness. Each material enhances the natural warmth of the gold.

You need a spring bar tool (a small fork-shaped instrument). Position it under the elastic pin on the case, gently press downward to compress the internal spring, and remove the pin from the case. Repeat on the other side. Insert the new strap by aligning the holes at the ends, then reinsert the pins ensuring they click securely into position.

Yes, MilanoStraps offers a complete collection of handcrafted 18mm straps, customizable in leather, color, stitch width and initials. All straps are made for this specific size and guaranteed for 18 months. You can also choose the buckle type (deployant, ardillon, sports buckle).

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) lasts between 3 and 7 years with daily use, depending on frequency of wear, climate and care. Vegetable tanning ages elegantly and develops patina. Storing the watch in dry environments and avoiding prolonged exposure to moisture and direct sunlight considerably extends the lifespan.