Strap for Flagship 38.5 Silver / Bracelet

The Longines Flagship L4.874.4.72.6 features a lug width of 20 mm. This measurement is precise and requires straps specifically sized for this width; it is not compatible with standard 18 or 22 mm straps. To verify the lug width, measure the internal distance between the two strap lugs using a calliper, perpendicular to the watch case.

For this model, we recommend an alligator or vegetable-tanned calf leather strap, which enhance the classical elegance of the stainless steel case. Shell cordovan represents the finest choice for those seeking a natural patina that develops over time. For casual or sports wear, a robust NATO fabric strap remains functional and aesthetically pleasing. Your choice of material should reflect your daily usage and professional context.

Changing the strap requires removal of the spring bars from the lugs using a dedicated tool (spring bar tool). Position the watch face down on a soft surface, insert the tool into the lateral slot of the spring bar to compress the internal spring, then extract the bar itself. Repeat this procedure on both sides. Install the new strap by reversing the procedure, ensuring the spring bars are fully inserted and the strap sits flush against the lugs without play.

Yes, any quality strap with a 20 mm lug width is compatible with the Longines Flagship L4.874.4.72.6. Artisanal straps available online at milanostraps.it are manufactured to precision standards for this width and are customisable in length, material, and finish. A well-constructed aftermarket strap complements the classical aesthetics of the watch without compromise.

The lifespan of a leather strap depends on the material and frequency of use. An alligator strap with vegetable tanning typically lasts 3–5 years with moderate daily wear. Shell cordovan, being more resilient, can last 7–10 years or more. Calf leather tends to show signs of wear more quickly (2–3 years), though it develops a beautiful natural patina. Factors such as humidity, perspiration, sunlight exposure, and wear frequency affect durability; proper maintenance (drying after rain, avoiding prolonged soaking) significantly extends the strap's lifespan.