Strap for Master Collection 40 Date Stainless Steel / Blue / Alligator

The Longines Master Collection L2.793.4.92.0 features a lug width of 21mm. This measurement represents the internal distance between the two horizontal pins protruding from the case and is the fundamental parameter for selecting a compatible strap. A 21mm strap ensures that the strap lug width fits perfectly to the case lugs without creating unsightly protrusions or gaps.

For the Master Collection L2.793.4.92.0, the most suitable materials are alligator or vegetable-tanned calf leather, both capable of enhancing the formal elegance of the case. Black or cognac alligator offers a timeless appearance, while brown calf with natural patina introduces superior everyday versatility. For more casual contexts, shell cordovan in bordeaux or a canvas NATO strap in waxed finish ensures durability and a less formal visual profile whilst maintaining stylistic coherence.

Strap replacement is accomplished by removing the horizontal pins (spring bars) that connect the lugs to the case. Using a dedicated tool (spring bar tool or lever), compress the internal spring of the pin until one end is released from the lug hole, then fully extract the pin. Next, position the new strap by aligning the lug holes with the pins, reinsert the pin into the first hole, and push it until the internal spring engages in the second hole. This operation takes 2-3 minutes for experienced individuals; alternatively, consult a watchmaker.

Any strap with a 21mm lug width is compatible with the L2.793.4.92.0, regardless of manufacturer. The important consideration is to verify that the strap lug width is coherent (typically 18-20mm internal clearance) to ensure the strap is neither oversized nor undersized. Bespoke leather straps allow you to customise leather type, colour, thickness, buckle style, and even stitching thread, creating a tailored combination suited to your wrist and personal style.

Leather strap durability depends on the material and usage intensity. Alligator or shell cordovan, with regular maintenance (occasional cleaning and conditioning), can last 10-15 years or longer. Vegetable-tanned calf, a more delicate material, typically reaches 3-5 years of intensive daily use before showing significant wear at the tip. A bespoke strap from Casati Milano benefits from an 18-month warranty and can be serviced or replaced if necessary, effectively extending the lifespan of the piece.