Strap for Elegant Collection Automatic 39 Stainless Steel / Grey / Strap

The lug width (ansa width) of the Longines Elegant L4.910.4.72.2 is 20mm. This measurement is the internal distance between the two attachment lugs on the case and determines which strap is compatible. Many Longines models in the 39-40mm range feature 22mm lugs, so it is essential to verify this specification before purchasing a replacement strap to avoid compatibility issues.

The most suitable strap depends on the intended use and dial colour of your watch. For formal occasions, alligator leather in brown or black with brushed finishes represents the classic choice, thanks to its uniform texture and the patina it develops over time. For daily versatility, vegetable-tanned calf leather offers a balance between elegance and practicality. For those seeking a sporty-elegant option, shell cordovan or a high-quality NATO fabric strap maintain the model's understated profile. On milanostraps.it you will find 20mm straps pre-selected for both mechanical compatibility and aesthetic harmony.

Changing the strap is a straightforward operation: position the watch case-up and locate the spring bar securing the strap. Using a spring bar tool (a small spatula supplied with most straps or available for separate purchase), gently press the spring bar downward to release it from its seat on the case. Repeat on the other side. Insert the new strap by aligning the holes with the spring bars and press until they click into place. Verify that the strap is firmly secured before wearing the watch.

Yes, provided it is correctly sized for a 20mm lug width. Quality aftermarket straps (such as those crafted by specialists in fine leather) often offer superior quality compared to the original strap, with customisation options in colour, texture and buckle type. On milanostraps.it, all 20mm straps are tested for mechanical compatibility and selected for aesthetic harmony with watches in this category. Atelier Casati Milano also offers bespoke commissions with personal selection of leather materials.

The lifespan of a leather strap depends on the material, tanning method and usage patterns. A vegetable-tanned alligator strap, if properly maintained (avoiding prolonged soaking and drying promptly if exposed to moisture), can last 3-5 years with daily wear. Shell cordovan, owing to its molecular density, can last 7-10 years or more. Calf leather typically lasts 2-4 years. To extend strap life, avoid prolonged moisture exposure, replace immediately if stitching begins to fail, and occasionally apply a specific conditioner for fine leathers. Atelier Casati Milano provides an 18-month warranty on all commissioned straps and offers restoration services.