Longines · Conquest

Strap for Conquest Chronograph Silver 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
ReferenceL3.662.4.76.6 (aka: L36624766)
FamilyConquest
MovementLongines caliber L667 hours, minutes, small seconds | date | Chronograph
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 L3.662.4.76.6 (aka: L36624766)

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Conquest L3.662.4.76.6 (aka: L36624766), seen from the bench

The Longines Conquest features the L667 caliber with hour, minute, small seconds, date and chronograph functions. The L3.662.4.76.6 reference model has 21mm lugs. The watch offers a combination of traditional time indication and chronograph functionality in a sporty format.

Frequently asked questions

What is the lug width of the Longines Conquest L3.662.4.76.6?

The lug width of the Longines Conquest L3.662.4.76.6 is 21mm. This technical specification indicates the space between the two lugs where the strap attaches. To verify strap compatibility, measure the inner passant with a digital calliper, positioning it between the two anchor points on the case.

What is the best strap for the Longines Conquest L3.662.4.76.6?

The choice depends on usage context and personal aesthetics. For formal occasions, an alligator strap in brown or black delivers understated elegance. For daily wear, vegetable-tanned calf leather develops a natural patina over time. For sports and humid environments, rubber or NATO straps ensure durability and practicality. The brushed steel case pairs superbly with all these options.

How do I change the strap on my Longines Conquest L3.662.4.76.6?

Remove the original strap passant using a spring bar tool with care. Insert the tool into the lug hole from the top, press gently downward to release the spring, then extract the spring bar. Repeat for both sides. Insert the new spring bars into the new strap and reposition it on the case. If uncertain, consult a qualified watchmaker.

Is an aftermarket strap compatible with the Longines Conquest L3.662.4.76.6?

Yes, provided the strap is manufactured for 21mm lug width. Compatibility is determined by the lug width specification, not by watch brand. On milanostraps.it you will find artisanal leather and rubber straps certified for 21mm, customisable in size, colour and finish. Atelier Casati Milano also offers made-to-measure solutions with direct consultation.

How long does a leather strap last on my Longines Conquest L3.662.4.76.6?

A quality leather strap, if properly maintained, typically lasts 3–5 years under daily wear conditions. Durability depends on sun exposure, humidity, perspiration and frequency of use. Alligator or shell cordovan straps tend to last longer than standard calf leather. Atelier Casati Milano provides an 18-month warranty on bespoke straps, covering manufacturing defects.

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