Longines · Les Grandes Classiques

Strap for Prestige Gold 21

Takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width16 mm
Case diameter21 mm
ReferenceL4.228.6.32.6 (aka: L42286326)
FamilyLes Grandes Classiques
MovementLongines caliber L963 hours, minutes | date
CaseYellow Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Les Grandes Classiques L4.228.6.32.6 (aka: L42286326)

Selected for the 16 mm lug width

All 16 mm straps →

The Les Grandes Classiques L4.228.6.32.6 (aka: L42286326), seen from the bench

The Longines Les Grandes Classiques L4.228.6.32.6 is a refined Swiss dress watch featuring a 21mm yellow gold case and Longines caliber L963 quartz movement with date display. The 16mm lug width ensures perfect proportions between case and strap. Designed for elegant wrists, this model represents classic watchmaking with no unnecessary complications—hours, minutes, and date only. The 18-karat yellow gold develops a natural patina over time, aging with dignity as a true companion piece.

Frequently asked questions

What is the lug width of the Longines Les Grandes Classiques L4.228.6.32.6?

The lug width of the Longines Les Grandes Classiques L4.228.6.32.6 is 16mm. This measurement represents the distance between the inner edges of the metal lugs that attach the strap to the case. It is essential to use straps specifically dimensioned for 16mm to ensure correct fit without forcing the passage and damaging the metal support.

Which strap material is most suitable for the Longines Les Grandes Classiques L4.228.6.32.6 in yellow gold?

Alligator is the most natural material for this model. The geometric texture of alligator leather creates a harmonious conversation with the yellow gold tone. An elegant alternative is vegetable-tanned calf, which recalls historical straps and develops a unique patina over time. Shell cordovan, if available in 16mm, offers initial rigidity followed by softness. A rubber strap represents a versatile contemporary choice for summer months while fully respecting the case proportions.

How do you correctly change the strap on the Longines L4.228.6.32.6?

To change the strap, use a spring bar removal tool or small lever. Position the watch with the crown facing upward, insert the tool into the recess of the spring bar, and gently push downward to release one end of the spring. Repeat for the other lug. Always support the case during this operation to prevent drops. When reinserting the strap into the new one, ensure the spring bar is correctly positioned and clicks firmly into place.

Are aftermarket straps compatible with the Longines Les Grandes Classiques L4.228.6.32.6?

Yes, but with one critical specification: you must use straps specifically dimensioned for 16mm lug width. Many standard straps on the market are 18mm, which will not fit this model correctly. Always verify technical specifications before purchase. Bespoke artisanal straps offer the opportunity to choose materials, colours, and finishes that perfectly complement the yellow gold tone of the case.

What is the lifespan of a leather strap for the Longines L4.228.6.32.6?

A quality leather strap, made from alligator or calf, has an average lifespan of 3-5 years if worn regularly and subjected to adequate maintenance. Absorption of natural skin oils, sun exposure, and humidity accelerate wear. Alligator straps tend to age more gradually than calf. Lifespan can extend to 7-10 years for straps subjected to frequent maintenance (cleaning, conditioning). A rubber strap has a similar lifespan but with more predictable degradation and less visible patina development.

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