Strap for La Grande Classique 38 Stainless Steel / Blue - Diamond / Bracelet

The lug width of the Longines La Grande Classique L4.866.4.97.6 is 20 mm. This measurement is taken from the centre of one lug pin to the centre of the opposite lug pin. It is essential to verify this dimension with a digital calliper before ordering an aftermarket strap, as an incorrect measurement would compromise fitting.

The best strap for this model is alligator in dark brown (mahogany) with vegetable tanning, or formal black calf leather. These materials respect the minimalist aesthetic of the watch and develop a natural patina over time. For daily wear, vegetable-tanned calf leather offers practicality and elegance without aesthetic compromise.

Strap removal is accomplished by extracting the lateral lug pins that traverse the watch case lugs. Use a spring bar tool positioned beneath the pin and lift gently until the pin disengages from its seat, then remove the old strap. Insert the new strap ensuring the pin is fully seated on both sides of the case.

Yes, any strap with a 20 mm lug width is compatible with the L4.866.4.97.6. MilanoStraps offers a dedicated collection of 20 mm straps in alligator, calf leather, vegetable-tanned materials and technical fabrics, customisable in length and details. The Casati Milano atelier also creates bespoke custom solutions.

A quality leather strap (alligator, vegetable-tanned calf) has an average lifespan of 3–5 years with daily wear. Longevity depends on tanning quality, thickness, ambient humidity and frequency of use. Alligator straps tend to last longer, developing a desirable patina. The Casati Milano warranty covers 18 months against manufacturing defects.