Longines
La Grande Classique L4.918.1.91.7— lug 20mm
Longines La Grande Classique L4.918.1.91.7: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Longines L4.918.1.91.7The essential strap measurement.
Browse 20mm straps →L4.918.1.91.7
Longines caliber L591 Hours, Minutes
The Heritage
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Selected for the 20mm lug width of the La Grande Classique
FAQ
What is the lug width of the Longines La Grande Classique L4.918.1.91.7?
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.
What strap is ideal for the Longines L4.918.1.91.7?
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.
How do you change the strap on the Longines La Grande Classique L4.918.1.91.7?
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.
Can aftermarket straps compatible with the Longines L4.918.1.91.7 be used?
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.
What is the average lifespan of a leather strap for the L4.918.1.91.7?
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.