Strap for La Grande Classique Automatic 25 Stainless Steel / Silver

The lug width of the Longines La Grande Classique L4.398.4.72.6 is 13mm. This measurement is specific to this 25mm ladies' model and does not represent a universal standard. To verify compatibility before purchasing a strap, use a digital calliper and measure the space between the lugs, or consult the original warranty documentation of your watch.

For this ladies' dress watch, alligator leather is the ideal choice: its natural texture aligns perfectly with the minimalist lines of the case, and the material is sufficiently lightweight for a 25mm case. Valid alternatives include vegetable-tanned calf leather, which develops a distinctive patina over time, NATO fabric in neutral colours for daily practicality, and structured synthetic rubber in black or dark grey for informal contexts.

Remove the watch from your wrist and position it on a soft surface, with the case facing upwards. Use a springbar tool (a flat-tipped instrument) to apply gentle pressure to one of the lateral pins, lifting the end of the strap. Once the first pin is released, extract the strap completely. Repeat the same procedure for the other side. Insert the new strap by aligning the holes with the pins and push gently until you hear a click of engagement.

Yes, provided the strap is specifically designed for a 13mm lug width. Milano Straps offers artisanal straps compatible with this specific dimension, ready for shipment and customisable in leather (alligator, calf), fabric and colour. The Casati Milano atelier can also create bespoke straps entirely to measure, with choice of leathers and personalised details, ensuring perfect aesthetic matching.

A quality leather strap, worn daily, lasts on average 3-5 years before the material begins to show significant signs of wear. With vegetable tanning, the leather develops a fascinating patina over time. Durability depends on frequency of use, ambient humidity and quality of craftsmanship. Milano Straps offers an 18-month warranty on straps made by the Casati Milano atelier, covering manufacturing defects.