Longines · Conquest Classic

Strap for Conquest Classic Chronograph

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter41 mm
ReferenceL2.786.4.76.6 (aka: L27864766)
FamilyConquest Classic
MovementLongines caliber L688.2 hours, minutes, small seconds | date | Chronograph, column wheel
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 Classic L2.786.4.76.6 (aka: L27864766)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Conquest Classic L2.786.4.76.6 (aka: L27864766), seen from the bench

The Longines Conquest Classic L2.786.4.76.6 evolves a heritage rooted in the 1950s with a 41mm stainless steel tonneau case and integrated lugs. Powered by the automatic Longines L688.2 calibre with column-wheel chronograph, hours, minutes, small seconds and date, it combines sports chronograph legacy with modern versatility. The 20mm lug width suits this case diameter proportionally, and 300-meter water resistance confirms its sports functionality.

Frequently asked questions

What is the lug width of the Longines Conquest Classic L2.786.4.76.6?

The lug width of the Longines Conquest Classic L2.786.4.76.6 is 20mm. This dimension represents the horizontal distance between the lugs (spring bars) on the case where the strap fits. To verify your lug width, remove the strap from the caseback and measure with callipers the internal space between the two lugs: the measurement to the nearest millimetre is your exact lug width.

What is the best strap for the Longines Conquest Classic L2.786.4.76.6?

The ideal strap depends on your intended use and desired aesthetic. For formal occasions, genuine alligator leather with vegetable tanning or shell cordovan offer authentic elegance and develop beautiful patina over time. For versatile daily wear, brushed or smooth calf leather is the optimal balance between aesthetics and practicality. For sports and water activities, FKM rubber with alligator embossing provides absolute functionality. Milanostraps.it offers immediate compatible solutions; for complete personalisation, contact the Casati Milano atelier for colour and material consultation by appointment.

How do I change the strap on my Longines Conquest Classic L2.786.4.76.6?

The Longines Conquest Classic L2.786.4.76.6 uses standard 20mm lugs. To change the strap, obtain a spring bar removal tool (a small steel instrument specifically designed for watches) or a rounded-tip pin. Position your watch caseback facing you, insert the spring bar tool into the lug hole from the external side and gently lever upward until the spring bar (pin) releases. Repeat on the other side. Insert the new strap by aligning the holes and reintroduce the spring bars until they click into place. If unsure, consult a professional watchmaker or contact Casati Milano for assistance.

Are aftermarket straps compatible with the Longines Conquest Classic L2.786.4.76.6?

Yes, any artisanal strap with a 20mm lug width is compatible with the Longines Conquest Classic L2.786.4.76.6. Milanostraps.it offers a collection of 20mm straps in various materials (alligator, calf, shell cordovan, rubber) ready for immediate shipment and customisable in dimensions, initials and stitching thread. Ensure the strap has been correctly measured (20mm between the insertion holes) and features spring bars compatible with your watch.

How long does a leather strap last on my Longines Conquest Classic?

The lifespan of a leather strap depends on the material and usage. Quality brushed calf with vegetable tanning lasts approximately 3–5 years with daily wear; shell cordovan, due to its denser structure, can reach 5–8 years. Genuine alligator typically lasts 4–6 years. FKM rubber straps last 7–10 years. The patina, soft colour shift and natural imperfections that appear over time are signs of authentic ageing, not deterioration. To extend longevity, keep the strap dry after water contact and occasionally apply a specific conditioning balm. Casati Milano offers an 18-month warranty on all straps: if you encounter manufacturing defects, replacement is covered.

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