Strap for Master Collection 40 Date Stainless Steel / Black - Roman / Bracelet

The lug width of the Longines Master Collection L2.793.4.59.6 is 21mm. This measurement represents the distance between the two lugs at the dial level, determined by the width of the 40mm case. Correct measurement is essential: position the calliper perpendicular to the dial, excluding the crown, and read the value to the nearest tenth of a millimetre.

Alligator leather with vegetable tanning represents the choice of excellence: its natural texture and patina evolution align perfectly with the Master Collection's refinement. Alternatively, shell cordovan offers controlled lustre and exceptional durability. For a sportier approach, structured rubber or technical fabric maintain practicality and water resistance without aesthetic compromise.

Strap replacement requires two essential tools: a spring bar tool (forked extractor) and a stable work base. Position the watch on the support, insert the tool's end into the small hole beneath the lug, apply gentle pressure to release the spring, and slide the pin out. Repeat on the other side. When installing the new strap, ensure the spring bar is fully engaged before releasing pressure. Slow, controlled movements prevent damage to the lugs.

Yes, any strap with a 21mm lug width is compatible with the Master Collection L2.793.4.59.6. The key is verifying that the strap width at the keeper matches the lug geometry. Artisanal straps offer personalisation advantages: choice of leather, thickness, thread colour, and deployante or buckle configuration.

Durability depends on material and usage. An alligator or shell cordovan with vegetable tanning, worn daily, maintains aesthetic and functional integrity for 3–5 years. Quality calf leather resists 2–3 years of constant use. Patina, natural softening, and micro-scratches are signs of evolution, not deterioration. A sound practice is rotating two straps to distribute stress, allowing leather to breathe and recover. An 18-month artisanal warranty covers construction defects.