Strap for Elegant Collection Automatic 37 Stainless Steel / Black / Bracelet

The lug width (ansa width) of the Longines Elegant L4.810.4.57.6 is 19mm. This measurement refers to the distance between the two lugs of the case, measured from inner edge to inner edge, and is the decisive parameter for purchasing a compatible strap. Verification using a digital calliper ensures absolute precision.

There is no single 'best' strap in absolute terms, but rather a choice consistent with intended use. For maximum formal elegance, we recommend alligator in black or navy blue. For daily versatility, vegetable-tanned calf leather in tobacco or taupe grey. For informal sports environments, silk or cotton NATO straps. The 37mm case proportion is enhanced by straps of moderate thickness, between 3 and 4.5mm.

The change is made by removing the pins/bars from the case lugs using a dedicated tool called a spring bar tool. Position the tool under the internal spring of the bar, push toward the case centre, remove the old strap lug, and insert the new one. A simple operation requiring no expertise, though also available at Casati Milano with free consultation.

Yes, any strap with a 19mm lug width is compatible. The artisanal straps online at milanostraps.it have been selected to guarantee construction quality consistent with Longines standards. The choice of leather, tanning, thickness and finish remains entirely personal. For maximum aesthetic compatibility, we recommend consultation with Casati Milano.

A natural leather strap with vegetable tanning or traditional tanning lasts on average between 3 and 5 years with daily use, variable based on intensity of use, ambient humidity and leather type. Alligator is generally more durable than calf leather. Casati Milano straps benefit from an 18-month warranty and can be regenerated with stitching repairs and surface renewal interventions.