Longines · La Grande Classique

Strap for La Grande Classique Quartz 37 Yellow

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

Lug width20 mm
Case diameter37 mm
ReferenceL4.766.2.42.8 (aka: L47662428)
FamilyLa Grande Classique
MovementLongines caliber L420 Hours, Minutes
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 La Grande Classique L4.766.2.42.8 (aka: L47662428)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The La Grande Classique L4.766.2.42.8 (aka: L47662428), seen from the bench

The La Grande Classique represents Longines' dress watch line characterized by essential lines and a slim profile. The model is equipped with the L420 quartz caliber with hour and minute indication. The case features 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Longines La Grande Classique L4.766.2.42.8?

The lug width is 20 millimetres. This specification is essential for identifying compatible straps: measurement is taken from the centre of the left lug to the centre of the right lug, perpendicular to the case body. Any strap designated for 20mm lug width will fit perfectly with this model.

Which strap material is best suited to the Longines La Grande Classique L4.766.2.42.8?

Brown alligator, premium calf leather and shell cordovan harmonise most beautifully with this watch's formal identity. Alligator maintains natural optical proportions, calf develops characteristic patina over time, and shell cordovan offers extraordinary durability. For daily wear, black or navy FKM rubber provides practical functionality without compromising the case's elegance.

How do I change the strap on a Longines La Grande Classique L4.766.2.42.8?

The strap is secured to the watch via two removable lugs. Use a spring bar tool or consult a watchmaker. Extract the elastic pin connecting the lug to the case, then remove the lugs themselves. The old strap is then detached and replaced with the new one, ensuring the lugs engage correctly and with uniform pressure. This operation requires care to avoid scratching the case.

Is an aftermarket strap compatible with the Longines La Grande Classique L4.766.2.42.8?

Yes, provided the strap is designed for 20mm lug width and the buckle or deployant clasp is proportioned to the 37-millimetre case diameter. Bespoke artisanal straps guarantee complete compatibility and allow customisation of leather, colour, thickness and stitch pattern. A quality aftermarket strap can extend the watch's usable life and adapt it to different wearing contexts.

How long does a leather strap last on the Longines La Grande Classique L4.766.2.42.8?

A premium leather strap—alligator, calf, or shell cordovan—typically lasts 3–5 years with regular use, provided it receives proper maintenance: rapid drying after water contact, protection from prolonged direct sunlight, and occasional application of conditioning balm. FKM rubber lasts longer, 5–7 years, whilst vegetable-tanned leather visibly ages but maintains structural integrity for 5–6 years of consistent wear.

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.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only