Strap for Portuguese Chrono-Automatic White Gold / Black

The lug width is 20mm. Measure by positioning a digital caliper between the inner shoulders of the lug, where the strap sits. Do not confuse this with the outer case width, which is larger. Precise measurement ensures complete compatibility with selected straps.

Medium-grain alligator is the natural pairing: the regular texture does not compete with the coldness of white gold, but rather enhances it. Shell Cordovan remains bold—the brownish patina contrasts elegantly with white gold, developing chromatic complexity over time. Vegetable-tanned calf represents the minimalist, conservative, and long-lasting alternative.

Use a spring bar remover to detach the elastic pins securing the old strap to the lugs. Work gently to avoid scratching the white gold. Align the new strap holes with the lugs, then reinstall the elastic pins ensuring they are fully seated. For valuable chronographs, consider replacement by an authorised service centre.

Yes, provided the strap is specifically designed for the 20mm lug width. Milano Straps' handcrafted straps are tested on this model and maintain precise geometric compatibility. Always verify that the thickness at the base does not exceed 4mm, to prevent friction against the case horn.

A calf strap with vegetable tanning or alligator, rotated regularly (changed every 4–6 weeks), lasts on average 4–6 years with proper maintenance. Shell Cordovan, due to its density and fibre structure, reaches 7–8 years. Longevity depends on wear from perspiration, ambient humidity, and cleaning frequency. Milano Straps provides 18-month warranty on all handcrafted straps.