Longines · Conquest

Strap for Conquest Quartz 41mm Silver

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
ReferenceL3.659.4.76.6 (aka: L36594766)
FamilyConquest
MovementLongines caliber L115 Hours, Minutes, Seconds | 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 L3.659.4.76.6 (aka: L36594766)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Conquest L3.659.4.76.6 (aka: L36594766), seen from the bench

The Longines Conquest L3.659.4.76.6 is a 41mm stainless steel sport watch featuring the Longines caliber L115 movement visible through the caseback. This Swiss tool watch delivers hours, minutes, seconds, date window, and standard frequency (28,800 vph) with a water resistance of 30 meters. The model has a lug width of 21mm, requiring a specifically sized strap. The compact case thickness ensures comfortable wear under a shirt while maintaining legibility and robust construction.

Frequently asked questions

What is the lug width of the Longines Conquest L3.659.4.76.6?

The lug width (ansa) of the Longines Conquest L3.659.4.76.6 is 21mm. This measurement corresponds to the distance between the internal steel pins that support the strap. A compatible strap must fit snugly without lateral gaps.

What is the best strap for the Longines Conquest L3.659.4.76.6?

For a 41mm stainless steel Conquest, alligator leather is the ideal choice: the structured grain enhances the tool watch sportiness, whilst the construction durability guarantees longevity. Shell cordovan is an excellent alternative for those seeking deep patina and visible ageing. Vegetable-tanned calfskin offers daily simplicity and restraint.

How do you change the strap on a Longines Conquest?

To change the strap, remove the watch from your wrist. Using a small screwdriver or spring bar tool, gently press the steel pin on one side of the strap towards the watch case: the pin will release. Repeat on the other side. Insert the new strap by aligning the pins into the lug slots and pressing until you feel a click.

Is an aftermarket 21mm strap compatible with the Longines Conquest L3.659.4.76.6?

Yes, any strap with a 21mm lug width is compatible with the Conquest L3.659.4.76.6, regardless of brand. Always verify the strap width is exactly 21mm (distance between internal pins): an oversized or undersized strap will not fit correctly.

How long does an artisanal leather strap last on a Longines Conquest?

A high-quality leather strap (alligator, cordovan, calfskin) typically lasts 3–5 years with daily wear, depending on storage and tanning method. Vegetable-tanned leather develops patina and colour over time, improving aesthetically. A replacement during the watch's lifespan (10+ years) is realistic and recommended to maintain wearing comfort.

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