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
ReferenceL2.786.5.56.7 (aka: L27865567)
FamilyConquest Classic
MovementLongines caliber L688.2 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel
CasePink Gold, Stainless 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 L2.786.5.56.7 (aka: L27865567)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Conquest Classic L2.786.5.56.7 (aka: L27865567), seen from the bench

The Longines Conquest Classic features the automatic caliber L688.2 with column-wheel chronograph function. The movement offers indication of hours, minutes, small seconds and date in addition to the chronograph functionality. The reference L2.786.5.56.7 represents a version of the Swiss brand's Conquest Classic collection.

Frequently asked questions

What is the lug width of the Longines Conquest Classic L2.786.5.56.7?

The lug width of this model is 20 millimetres. You can verify it by measuring the distance between the two metal pins protruding from the case lugs. It is essential to respect this exact measurement to ensure proper attachment and harmonious visual proportion between case and strap.

Which strap is most suitable for the Longines Conquest Classic L2.786.5.56.7?

Alligator in brown or cognac is the purist choice, enhancing the two-tone elegance without chromatic competition. For daily versatility, grained calf leather in dark brown or burgundy tones offers comfort and longevity. For sporting contexts, a canvas NATO or vulcanised rubber strap maintains chronographic functionality without distracting from the case's aesthetic.

How do you change straps on a Longines Conquest Classic?

Position the watch on a stable surface. Locate the pins connecting the strap to the case, typically positioned at the lugs. Use a spring bar tool to compress the small internal metal pin and remove the old strap. Insert the new strap pins into the housings and gradually release the spring until fully secured. If uncertain, consult a professional watchmaker.

Are aftermarket 20mm straps compatible with the Longines Conquest Classic?

Yes, any strap with 20 millimetre lug width is technically compatible. However, to maximise aesthetic harmony with the case's two-tone character and the Conquest's sport-elegant style, we recommend premium leathers such as alligator, vegetable-tanned calf, or shell cordovan. On milanostraps.it you will find a curated selection of customisable 20mm straps.

How long do leather straps last on a watch like the Longines Conquest Classic?

A premium leather strap typically lasts 3–5 years with daily use, depending on material quality, tanning method, and maintenance. Alligator and shell cordovan age beautifully, developing patina; calf requires periodic gentle cleaning with appropriate products. Prolonged exposure to perspiration, extreme humidity, and intense UV rays reduces durability. Casati Milano guarantees 18 months on bespoke straps and provides personalised maintenance advice.

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