Strap for La Grande Classique Quartz 37 Yellow

The Longines La Grande Classique L4.766.2.12.7 features a lug width of 20 millimetres. This technical specification, measured between the two spring bars, determines compatibility with any aftermarket strap. To verify, remove the original strap and measure the distance between the suspension holes: 20mm is a widely established standard in contemporary horology.

The choice depends on your wearing context. For office and formal occasions, we recommend dark brown or black alligator with a deployante, which harmonises perfectly with the 37-millimetre case. If you prefer versatility, calf leather with vegetable tanning develops a naturally evolving patina. For sports use, consider synthetic rubber or NATO in grey or navy. Shell cordovan is ideal if you seek legendary durability and progressive aesthetic ageing.

The process is straightforward: position the watch face-down on a soft surface. Locate the spring bars – the metal pins securing the strap to the case lugs. Using a dedicated spring bar tool or very fine screwdriver, press the pin inward whilst gently pulling the strap out. Repeat on the opposite side. To install your new 20mm strap, insert the spring bars into the corresponding holes and release gradually. If uncertain, contact the Casati Milano atelier for professional assistance.

Absolutely. Any strap with a 20-millimetre lug width is compatible with your Longines. On milanostraps.it you will find an exclusive selection of artisanal 20mm straps in alligator, calf leather, shell cordovan and rubber, all tested for this model. Simply verify that the lug width is 20mm before purchase.

Durability varies according to material and usage frequency. Quality alligator or vegetable-tanned calf leather lasts 5–10 years under moderate wear. Shell cordovan can exceed 15 years, as its fibrous structure is inherently more robust. Synthetic rubber typically lasts 3–5 years before showing age signs. All milanostraps.it straps include an 18-month warranty, and Casati Milano offers complimentary assistance for maintenance and repairs.