Longines
Conquest L3.759.4.96.6— lug 21mm

The lug width of the Longines Conquest L3.759.4.96.6 is exactly 21 mm. This measurement is specific to this model and is not a standard commercial size, so precise verification is essential before purchasing an aftermarket strap. Measurement should be taken between the inner lugs of the case where the strap attaches.

For the 41 mm Conquest in stainless steel, alligator leather with a fine grain offers discrete elegance, vegetable-tanned calf leather develops a natural patina over time, or shell cordovan for those seeking superior colour depth. These materials maintain the sporty-elegant character of the case without aesthetic compromise.

The strap is changed using spring bars (spring-loaded pins) that connect the strap to the case lugs. Using a dedicated spring bar tool, you press the spring bar to release it, remove the worn strap, and insert the new one, ensuring both ends of the spring bar click correctly into place. The operation requires care to avoid damage to the lugs.

Yes, provided the strap is marked or measured at 21 mm lug width. However, manufacturing precision varies between producers: some aftermarket straps exhibit tolerances that may cause micro-play or excessive tension. Casati Milano measures directly by appointment to guarantee millimetre-level compatibility and stitch finish conforming to segment standards.

A premium leather strap (alligator, vegetable-tanned calf, shell cordovan) with saddle-stitch construction typically lasts 3–5 years of daily wear, provided it is kept away from extreme humidity and conditioned periodically with natural oils. Deterioration depends on sun exposure, wrist-washing frequency, and initial tannage quality. Casati Milano offers an 18-month guarantee on assembly.