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

The lug width of the L2.793.4.97.0 is 21 millimetres. This measurement represents the perpendicular distance between the two lugs (spring bar holes) on the watch case. To verify it, remove the original strap and measure with a calliper the distance between the two lugs. A 21mm strap is the only compatible width for this model.

The most versatile option is a vegetable-tanned calf leather strap in dark brown or grey: it maintains the balanced character of the Master Collection and develops natural patina over time. For greater formality, an alligator strap in brown or burgundy is excellent. For daily wear and humid environments, a vulcanised rubber or woven NATO strap offers practicality without aesthetic compromise.

Remove the watch from your wrist and position it with the strap facing downward. Using a spring bar tool (a small implement with two prongs), press one prong inside the upper lug to release the spring. Extract one end of the spring and slide the old strap toward the opposite side. Repeat for the other lug. Insert the new strap by aligning one side first, then press with the tool to insert the spring into the opposite lug. Do not force to avoid damaging the spring.

Yes, any 21mm strap is mechanically compatible. The critical technical variables are: strap thickness (generally 3.5-4 mm), length (the pad must fully cover the lug), and buckle width if a deployante clasp is present. A quality artisanal 21mm strap guarantees compatibility without issues and superior finishing compared to the factory strap.

A vegetable-tanned calf leather strap, worn daily on a Master Collection, typically lasts 3-5 years before requiring replacement. Durability depends on sun exposure (which accelerates ageing), humidity, and frequency of wear. A vegetable-tanned leather develops uniform patina and maintains elasticity longer than chrome-tanned leather. Periodic maintenance with specific creams extends lifespan and enhances appearance.