Strap for Master Collection 42 Chronograph Stainless Steel / Blue / Bracelet

The lug width of the Longines Master Collection L2.759.4.92.0 is 21mm. This non-standard measurement is specifically engineered for the proportions of the 42mm case and must be respected precisely to ensure proper fit to the case lugs.

Alligator is the optimal choice for this model: its regular grain pattern harmonises perfectly with the case's functional aesthetic. Premium alternatives include shell cordovan for superior durability and patina development, vegetable-tanned calf for those who appreciate natural ageing, and NATO straps in cotton or cordura for sporting contexts.

Strap replacement is accomplished by removing the spring bars that connect the strap to the case lugs. Using a dedicated tool of approximately 1.8mm, press the spring bar from the rear until the strap is freed. Execute this operation gently on a soft surface to avoid damage to the case.

All straps manufactured with a 21mm lug width are compatible with the L2.759.4.92.0, provided they are constructed to precise tolerances. Casati Milano straps are specifically tested for this model and guarantee optimal fit and comfort without lateral play.

A quality alligator strap provides 3–5 years of daily wear; shell cordovan can exceed 7–8 years thanks to its inherent water resistance. Vegetable-tanned calf, more delicate, lasts 2–4 years. Regular maintenance and rotation with other straps significantly extend service life.