Longines · La Grande Classique
Strap for La Grande Classique Automatic 38 Stainless Steel / Grey - Roman
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the La Grande Classique L4.918.4.51.2 (aka: L49184512)
Selected for the 20 mm lug width · workshop selection
Hammered Calfskin Watch Strap Green with Ecru Stitching€98
Hammered Yellow Strap with Ecru Stitching€98
Black Calfskin Rally Watch Strap – Handmade in Milan€110
Red Suede Strap with Stitching — Milano Straps€90
Black Alligator Strap with Light Blue Edges€149
The La Grande Classique L4.918.4.51.2 (aka: L49184512), seen from the bench
Frequently asked questions
What is the lug width of the Longines La Grande Classique L4.918.4.51.2?
The lug width of this model is 20 millimetres. This measurement is taken between the two lugs of the case and determines compatibility with aftermarket straps. It is important to measure accurately using a digital calliper positioned perpendicular to the case lugs to ensure precision.
Which strap is best suited to the Longines La Grande Classique L4.918.4.51.2?
Given the formal character of this Swiss dress watch, a dark brown or black alligator strap represents the most harmonious choice, enhancing the silver dial through chromatic contrast. For a more contemporary aesthetic, vegetable-tanned leather or natural shell cordovan offer temporal evolution of patina. A navy NATO ribbon is ideal for casual pairings without compromising elegance.
How do I change the strap on the Longines La Grande Classique L4.918.4.51.2?
The process requires extraction of the spring bars from the case lugs using a specialist tool. Positioning the watch on a stable support, compress the internal spring of the bar and extract it from its seat. Subsequently, insert the new strap by aligning the lugs to the case holes and reposition the spring bar until it clicks. If unfamiliar with the procedure, a specialist atelier will complete the operation in minutes.
Can I use compatible aftermarket straps on the Longines L4.918.4.51.2?
Yes, absolutely. Any strap with a 20-millimetre lug width is geometrically compatible. The choice of artisanal quality—premium leathers, Italian stitching, refined finishes—amplifies the aesthetic value of the watch without altering its structural integrity. Choose ateliers that guarantee conformity to technical specifications and offer custom personalisation.
How long does a leather strap last?
Longevity depends on material and usage. A quality alligator strap lasts 3–5 years with ordinary maintenance (cleaning, annual conditioning). Shell cordovan, thanks to its superior protein density, can last 5–7 years or beyond. Calf and other delicate leathers require more careful attention, typically lasting 2–4 years. Humid climates and perspiration accelerate ageing. A specialist atelier offers reconditioning services that extend the strap's useful life.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
