Strap for Portofino Automatic Yellow Gold / Black - Breguet / Bracelet

The Portofino IW9251-04 features an 18-millimetre lug width. This measurement is fixed and represents the inner distance between the case lugs. Before ordering an aftermarket strap, it is essential to verify that it is sized for 18mm to ensure precise and secure attachment.

For the Portofino in yellow gold, straps in dark brown alligator (Mississippi or Nile) with vegetable tanning, or cognac to bourbon-toned shell cordovan are recommended. These materials amplify the warmth of the precious metal, creating coherent aesthetic dialogue. Dark brown alligator is the classic choice for formal contexts, whilst shell cordovan offers versatility with patina developing over time.

Strap replacement is performed by extracting the connecting pins (present on both sides of the case) using a dedicated tool called a spring bar remover. Once the pins are extracted, the old strap slides free; the new one is positioned by aligning the inner holes with the case lugs, then the pins are reinserted. Proceed with care to avoid scratching the case; alternatively, consult a professional watchmaker.

Yes, an aftermarket strap measuring 18mm is completely compatible. Numerous specialised brands, including milanostraps.it, offer leather, rubber and synthetic straps sized for this measurement. What matters is confirming that the lug width is exactly 18mm for a perfect fit.

A quality leather strap, crafted in alligator or shell cordovan with vegetable tanning, typically lasts 3–5 years with daily wear, depending on climate, humidity and frequency of use. Natural leather patinas with use, developing aesthetic character. Should excessive wear or breakage occur, replacement is the ideal solution. Casati Milano straps include an 18-month warranty.