Longines · Conquest

Strap for Conquest Quartz 41 Stainless Steel / Blue / Bracelet

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter41 mm
ReferenceL3.759.4.96.6
FamilyConquest
MovementLongines caliber L157 Hours, Seconds, Minutes | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Conquest L3.759.4.96.6

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Conquest L3.759.4.96.6, seen from the bench

The Conquest represents one of Longines' sport lines, characterized by essential functions of hours, minutes, seconds and date. It features the Longines L157 caliber with date indication. The lugs measure 21mm in width.

Frequently asked questions

What is the lug width of the Longines Conquest L3.759.4.96.6?

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.

Which strap material pairs best with the Longines Conquest L3.759.4.96.6?

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.

How do you change the strap on a Longines Conquest L3.759.4.96.6?

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.

Is an aftermarket 21 mm strap compatible with this L3.759.4.96.6?

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.

How long does a natural leather strap last on a Longines Conquest?

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.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only