Strap for Elegant Collection 25.5 Automatic Stainless Steel / Blue - Diamond / Bracelet

The lug width of the Longines Elegant L4.309.4.97.6 is 13mm. This is a non-standard measurement, characteristic of this ladies' model. The measurement is taken as the distance between the inner shoulders of the case, where the strap attaches to the lugs.

For the L4.309.4.97.6, straps in alligator, vegetable-tanned calf or shell cordovan are recommended, all in 13mm width. Vegetable-tanned alligator provides elegant texture; shell cordovan develops sophisticated patina over time. Avoid heavy materials that would distort the delicate proportions of the case.

The strap is replaced using a spring bar tool to gently remove the attachment pins from the 13mm lugs. Insert the new strap, aligning it perfectly with the case shoulders. If inexperienced, consult a watchmaker to avoid scratching the case.

Yes. milanostraps.it offers handcrafted 13mm straps with customisable finishes (stitching, initials, length) specifically compatible with the L4.309.4.97.6. Casati Milano atelier also creates bespoke straps with colour consultation and 18-month warranty.

A quality leather strap (alligator, calf, shell cordovan) on a daily-worn watch typically lasts 3-5 years before replacement. Longevity depends on moisture exposure, sunlight and tanning quality. Vegetable-tanned leather develops patina that increases aesthetic value, while chrome-tanned wears faster but uniformly.