Strap for Master Collection 38.5 Day Date Stainless Steel / Champagne-Diamond / Bracelet

The lug width of the Longines Master Collection L2.755.5.37.7 is 20 millimetres. This measurement represents the width between the horizontal lugs of the case and determines compatibility with any replacement strap. Measuring it accurately with a digital calliper is essential to ensure a precise fit.

The optimal strap depends on intended use. For formal elegance, we recommend dark brown or black alligator, which enhances the two-tone character of the watch. For everyday versatility, vegetable-tanned calf leather offers natural patina and authentic ageing. If you seek practicality, dark grey FKM rubber transforms the Master Collection into a more robust instrument whilst maintaining aesthetic dignity.

Strap replacement requires a spring bar tool with a bifurcated end. Position the forked tip beneath the horizontal lug pin, applying gentle pressure to compress the internal spring. Once released, withdraw the old strap and insert the new one by engaging the pin into the lateral apertures. Repeat for both lugs. We recommend entrusting this operation to a professional if you lack experience.

Yes, any strap with a 20-millimetre lug width is compatible with the Longines Master Collection L2.755.5.37.7. We recommend selecting quality consistent with the watch: vegetable-tanned leather, genuine alligator, or certified FKM rubber will ensure durability and aesthetic proportion to the instrument's value. Avoid synthetic PVC straps or low-grade raw leather.

Durability depends on usage, climate, and maintenance. A quality alligator or calf strap, worn daily under normal conditions, maintains structural integrity between 3 and 5 years. Frequent exposure to water, humidity, and perspiration accelerates ageing. An FKM rubber strap offers superior longevity (5-7 years) with minimal aesthetic degradation. Regular maintenance—gentle cleaning and avoiding prolonged sun exposure—significantly extends useful life.