Longines · Conquest

Strap for Conquest Automatic 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
ReferenceL3.658.4.76.6 (aka: L36584766)
FamilyConquest
MovementLongines caliber L633.5 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 L3.658.4.76.6 (aka: L36584766)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Conquest L3.658.4.76.6 (aka: L36584766), seen from the bench

The Longines Conquest reference L3.658.4.76.6 is equipped with the L633.5 caliber, featuring hour, minute, second, and date indications. The watch has 21mm lugs for the strap. The movement offers essential daily functions with the traditional reliability of the Swiss brand.

Frequently asked questions

What is the lug width of the Longines Conquest L3.658.4.76.6?

The lug width is 21mm, a rare and non-standardized dimension. This width requires straps specifically constructed for this model; ordering 20 or 22mm lugs results in incompatibility and risks of poor fit.

What is the best strap for the Longines Conquest L3.658.4.76.6?

The choice depends on usage. For formal and professional contexts, alligator or vegetable-tanned leather offer elegance and natural patina development. For marine or sports environments, FKM rubber or technical canvas preserve the athletic vocation. A stainless steel deployante maintains chromatic coherence with the case.

How do I change the strap on the Longines Conquest L3.658.4.76.6?

Position the watch face down. At the base of the case, next to each lug, you will find small holes with retention springs. Use a thin tool (spring bar tool) to push the spring inward, releasing the pin. Remove the old strap and insert the new one, aligning the pin with the seats. Verify stability before wearing.

Is there a compatible aftermarket strap for the Longines Conquest L3.658.4.76.6?

Yes. Since the lug width is 21mm, standard straps (20 or 22mm) do not fit. On milanostraps.it you will find ready-made 21mm straps in various leathers and colours. Alternatively, specialised craftsmen like Casati Milano construct custom solutions with personalised consultation.

How long does a leather strap last on the Longines Conquest L3.658.4.76.6?

Longevity varies based on material and usage. Alligator and vegetable-tanned leather, with ordinary maintenance (occasional cleaning, avoiding prolonged UV exposure), offer 3-5 years of intensive wear. Shell cordovan, more durable, exceeds 5-7 years. FKM rubber has a shorter lifespan, typically 2-3 years, but is more affordable and easier to replace.

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