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

The lug width of the Longines Elegant L4.910.4.57.2 is 20mm. This measurement refers to the distance between the lugs—the metal pins protruding from the sides of the case. To verify this, measure carefully from the centre of one lug to the centre of the other using a ruler or calliper. Accurate measurement is essential when purchasing compatible straps.

The best strap depends on usage and personal preference. For formal elegance, an alligator in dark brown with vegetable tanning or shell cordovan offers durability and developing patina. For daily versatility, vegetable-tanned calf in brown or black ensures comfort and longevity. For casual-elegant settings, a NATO fabric in black or grey maintains sobriety. The stainless steel case pairs seamlessly with any option.

To change the strap, you will need a spring bar tool or small flat screwdriver. Place the watch on a soft surface to prevent scratching. Locate the spring bar pin on the side of the strap, gently push inward with the tool to release the spring mechanism, then withdraw the strap. Repeat on the other side. Insert the new strap by aligning the lugs with the grooves, and press until the spring mechanism locks. This is a straightforward operation but requires care.

Yes, you can. Any strap with a compatible 20mm lug width can be fitted to the L4.910.4.57.2. Aftermarket straps offer alternatives in leather, exotic materials, textiles, and rubber that are unavailable in official Longines assortments. The critical factor is verifying that the lug width is precisely 20mm and that the strap shoulder (the end that sits on the case) is compatible with the case profile.

Longevity depends on leather quality, tanning method, and usage patterns. An alligator strap with vegetable tanning typically lasts 8–15 years with moderate daily wear. Vegetable-tanned calf varies between 4–8 years. Vegetable tanning develops natural patina over time, which extends aesthetic life even as the leather becomes more fragile. To extend lifespan, avoid prolonged water and direct heat exposure, and periodically apply a protective balm designed for artisanal leathers.