Strap for Master Collection Calendar 36 Stainless Steel / Diamond / Brown MOP / Bracelet

The lug width of the Longines Master Collection L2.503.0.07.6 is 20 millimetres. This measurement represents the distance between the inner edges of the two lugs on the case and determines strap compatibility. To verify this specification, measure perpendicularly from one lug base to the other using a calliper, ensuring you take the internal dimension.

The choice depends on intended use and aesthetic preference. For formal occasions, genuine alligator leather in black is the undisputed standard. For everyday versatility with natural patina development, vegetable-tanned calf leather is ideal. For sports use or weather resistance, vulcanised rubber or NATO fabric straps offer practicality and durability. The 36mm case particularly benefits from thin leather straps, which emphasise the watch's classical proportions.

Strap replacement is accomplished via the case lugs. Position the watch on a soft surface with the caseback facing upward. Locate the small slot or hole in the lug, usually on the underside. Use a spring bar tool with two ends to gently compress the internal spring, then remove the old strap. Insert the new strap by levering with the tool until the spring mechanism clicks into position. Verify both sides are securely fixed before wearing the watch.

Absolutely. Quality aftermarket 20mm straps are entirely compatible with the Master Collection. Choose reliable manufacturers that guarantee precise tolerances and durable materials. Milanostraps offers bespoke artisanal 20mm straps customisable for your model, available in alligator, calf, shell cordovan and synthetic materials. Investment in a quality strap significantly improves longevity and visual coherence.

Leather strap lifespan depends on usage frequency, storage conditions and material quality. A genuine alligator strap, with daily care (avoiding excess moisture and direct sunlight), lasts 3-5 years of intensive wear. Vegetable-tanned calf leather has similar longevity but develops a patina that positively extends perceived durability. Shell cordovan, due to its density, can last up to 7 years. Vulcanised rubber straps are substantially permanent but may harden after 5-8 years. Periodic maintenance with specialist conditioning products significantly extends useful life.