Strap for Saint-Imier Date 26

The lug width (ansa width) of the Longines Saint-Imier L2.263.4.87.6 is 20 millimetres. This measurement represents the distance between the case lugs and is the fundamental parameter for selecting compatible straps. A 20mm strap will fit perfectly without lateral play or excessive tension on the case.

The most suitable strap depends on usage and context. For formal elegance, we recommend black or dark brown alligator with a stainless steel deployante buckle. For everyday versatility, vegetable-tanned calf in cognac offers comfort and evolving patina. For sports use, a cotton and nylon NATO or anthracite grey rubber guarantees practicality without aesthetic compromise with the brushed case finish.

Strap replacement is accomplished by removing the spring bars that connect the strap to the case. Using a strap removal tool, gently compress the spring bars to free them from their seats, then extract the worn strap. Insert the new strap by aligning the holes with the spring bars and verify that these lock completely. If the new strap features rigid lugs, consult an expert for the first change.

Yes, a 20mm aftermarket strap is perfectly compatible, provided it respects the lug width and the inner diameter of the strap holes is slightly larger than the case spring bars. Choose straps constructed with quality leathers (alligator, shell cordovan, vegetable-tanned calf) and finishes in 316L stainless steel to guarantee durability and aesthetic coherence with the case's brushed finish.

The lifespan of a leather strap varies based on material and usage. An alligator or shell cordovan, worn daily, typically lasts 3–5 years before replacement is needed. Vegetable-tanned calf exposed to moisture and intense perspiration has an average lifespan of 2–3 years. Accelerated ageing does not represent a defect but the natural evolution of patina. To extend longevity, we recommend rotating periodically between straps and avoiding prolonged exposure to water and direct heat.