Strap for Master Collection 40 Date Stainless Steel / Silver-Diamond / Bracelet

The lug width of the Longines Master Collection L2.793.4.77.6 is precisely 21mm. This measurement represents the internal distance between the two lugs of the case where the strap connects. To verify this, position a ruler perpendicular to the spring bar holes: you will find exactly 21mm of usable space. This specific measurement is the result of proportional calculations by Longines to maintain aesthetic balance between the 40mm case mass and the strap.

For the L2.793.4.77.6, we recommend three options: American alligator for formal luxury, with natural grain that dialogues with the case's brushed surfaces; vegetable-tanned calf in dark grey or tortora tones for understated elegance; FKM rubber in black or anthracite for sporty contexts. Alligator ages beautifully, developing deep patina; calf develops natural patina over time; rubber offers practicality without aesthetic compromise.

Changing the strap on the L2.793.4.77.6 requires a dedicated tool (spring bar tool) available online or from jewellers. Position the watch on a clean surface, locate the spring bar pins at the lugs, insert the spring bar tool into one of the small holes to compress the internal spring, then extract the pin. Repeat on the other side. Insert the new strap by aligning its pins with the case's sockets and press until the pin clicks into position. Verify the strap is securely fastened before wearing the watch.

Yes, provided the strap is constructed for 21mm lug width. Quality aftermarket straps crafted by specialist artisans often offer superior workmanship compared to OEM straps. At milanostraps.it you'll find a collection of 21mm straps in alligator, calf, shell cordovan and rubber, all customisable in length, thread colour and initials. The key is ensuring the strap's lug width is precisely 21mm to avoid lateral play or anomalous movement.

Leather strap durability depends on material quality and usage intensity. Quality calf leather with vegetable tanning typically lasts 3-5 years with daily wear. American alligator, thanks to its denser molecular structure, can reach 5-8 years of active life before requiring replacement. Factors such as sun exposure, humidity and frequency of use accelerate ageing. FKM rubber straps have superior lifespan, reaching 8-10 years. Regular maintenance—gentle cleaning, storage in dry environments—significantly extends strap life.