Longines · Master Collection

Strap for Master Collection 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 diameter39 mm
ReferenceL2.669.4.78.6 (aka: L26694786)
FamilyMaster Collection
MovementLongines caliber L651 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 Master Collection L2.669.4.78.6 (aka: L26694786)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Master Collection L2.669.4.78.6 (aka: L26694786), seen from the bench

The Longines Master Collection L2.669.4.78.6 is a 39 mm stainless steel chronograph powered by the automatic Longines L651 caliber with hours, minutes, small seconds, date, and chronograph functions. The silvered dial with midnight blue subdials provides visual contrast while maintaining readability, and the fixed bezel allows quick time measurements. The 20 mm lug width is the standard for classical dress watches in this diameter class, offering balanced proportions between case and wrist.

Frequently asked questions

What is the lug width of the Longines Master Collection L2.669.4.78.6?

The Longines Master Collection L2.669.4.78.6 features a lug width of 20 mm. This is the international standard for classical wristwatches in this diameter category and is compatible with a vast range of aftermarket straps available in the market.

What is the best strap for the Longines Master Collection L2.669.4.78.6?

The best strap depends on intended use. For formal occasions, an alligator in dark brown or black with vegetable tanning guarantees uncompromising elegance. For daily versatility, a fine-grained calf in cognac or British tan is ideal. For those seeking character and natural patina development, shell cordovan in deep burgundy is the premium choice. For casual-sport contexts, a neutral-coloured nato fabric offers practicality and visual lightness.

How do I change the strap on the Longines Master Collection L2.669.4.78.6?

Strap replacement on the L2.669.4.78.6 is performed by removing the spring bars (small elastic pins at the lug ends). We use a dedicated tool (spring bar tool) to compress the spring and extract the pin. Once the lug ends are freed, the strap removes easily and the new one can be inserted following the reverse procedure. We recommend not forcing: the pin must snap firmly into the lug shoulders.

Can I use an aftermarket-compatible strap on my Longines Master Collection?

Yes, the Longines Master Collection L2.669.4.78.6 fully supports aftermarket straps with 20 mm lug width. High-quality artisanal straps, such as those in alligator with vegetable tanning or shell cordovan, guarantee not only structural compatibility but also tactile perception and aesthetic evolution over time far superior to standard straps. We recommend conscious material selection based on usage context.

How long does a leather strap last on the Longines Master Collection L2.669.4.78.6?

Lifespan depends on material and usage. Alligator with vegetable tanning or shell cordovan lasts on average 5-7 years with daily wear, developing a refined patina over time. Fine-grained calf has similar longevity but requires more frequent maintenance. Synthetic leather straps last 2-3 years. Rotation between multiple straps significantly extends overall lifespan. An atelier such as Casati Milano can regenerate or repair compromised straps, extending their useful life.

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