Strap for Portofino Automatic Stainless Steel / Black - Breguet / Strap

The lug width of the Portofino IW3513-13 is 18mm. This measurement represents the distance between the two lateral attachment pins on the case and determines compatibility with aftermarket straps. To verify this measurement on your watch, measure the space between the two lateral lugs where the strap attaches.

The ideal strap depends on usage: for formal elegance we recommend natural alligator with regular grain; for daily versatility, calf leather with vegetable tanning or shell cordovan; for casual-sports contexts, NATO canvas with rubber reinforcement. The colour choice should consider the watch's silver dial, which pairs perfectly with dark browns, blacks, and blues.

The Portofino 34mm uses standard 18mm spring bars. To change the strap: remove the spring bars with a dedicated tool, extract the old strap from the pins, insert the new strap under the bars, and reposition the bars into the case's lateral grooves until you feel the locking click. Ensure the strap sits symmetrically against the case.

Yes, all straps with an 18mm lug width are compatible with the Portofino IW3513-13. Always verify that the strap is manufactured for this measurement and that the lugs are dimensioned correctly so they don't protrude beyond the case edges. Quality artisanal straps maintain precise tolerances ensuring perfect insertion.

The lifespan of a leather strap depends on material and usage: a high-quality alligator or shell cordovan lasts 5-7 years with moderate daily use; robust calf 3-5 years; standard alligator 2-4 years. Ageing is not deterioration: it's the development of natural patina that adds character. Periodic maintenance (gentle cleaning, annual conditioning) significantly extends longevity.