Strap for La Grande Classique Automatic 38 PVD Red Gold / White - Roman / Bracelet

The lug width of the Longines L4.918.1.91.7 is 20mm. This measurement must be verified using a digital calliper positioned perpendicular to the case lugs. Any compatible strap must respect this dimension precisely to ensure correct mechanical fit without play or excessive tension.

For this 38mm dress watch, genuine alligator represents the pinnacle of refinement, with inimitable natural patina. Vegetable-tanned calf offers elegance and progressive ageing. A NATO fabric strap ensures casual versatility, while vulcanised rubber represents pure functionality. The choice depends on the desired balance between formality and practical versatility.

Strap replacement is accomplished through spring bars that connect the strap to the case lugs. Using a spring bar tool, gently push the bar toward the centre until the spring releases from its seat, then remove the old strap. Insert the new strap in reverse, ensuring the spring bar is fully seated in both lugs.

Yes, any strap with a 20mm lug width is mechanically compatible. However, construction quality, material selection and finishing vary significantly between manufacturers. An artisanal strap in alligator or vegetable-tanned calf guarantees superior durability and aesthetic evolution compared to standardised industrial products.

A quality calf strap, with daily use, maintains structural integrity for 3–5 years. Alligator, being more durable, can exceed 7–8 years. Vegetable-tanned leather, developing patina, tends to darken and stiffen gradually; regular conditioning with natural balms significantly extends useful life. Accelerated deterioration indicates only poor storage conditions (humidity, direct sunlight) or inferior materials.