Longines
Master Collection L2.793.4.71.6— lug 21mm

The lug width of the Longines Master Collection L2.793.4.71.6 is 21.00mm. This unusual specification requires handcrafted straps constructed with precision. To verify independently, use a digital calliper measuring between the internal attachment pins of the case.

Alligator leather in pearl grey represents the premium choice, emphasising the sobriety of the stainless steel case. Alternatively, vegetable-tanned calf in warm brown tones offers chromatic evolution over time and superior breathability, particularly suited for daily wear.

Strap replacement requires a spring bar tool, a specific instrument that enables depression of the pins whilst keeping the case stable. Position the watch on a soft surface, apply the tool to the pin, compress the lateral peg and remove the worn lug. Proceed cautiously to avoid scratching: the 21mm width permits reduced tolerance margins.

Yes, any strap with a 21mm lug width is compatible. Verify that the internal pin diameter matches: the Master Collection utilises standard 1.8mm lugs. Avoid straps exceeding 4.5mm thickness to prevent visual volumetric imbalance.

Longevity depends on tanning method and wear. Alligator leather with vegetable tanning subjected to daily use maintains structural integrity for 4–6 years. Calf resists 3–4 years under average conditions. Prolonged sun and humidity exposure accelerates deterioration. Periodic maintenance with specific cleaning products extends lifespan significantly.