Strap for Master Collection 34 Moonphase Stainless Steel / MOP / Alligator

The lug width of the Longines Master Collection L2.409.4.87.0 is 18mm. This measurement is specific to this 34mm model and represents the space between the lugs on their axis of rotation. It is essential to verify this measurement with a digital calliper before purchasing a replacement strap, as an incorrect width compromises both aesthetics and practical assembly.

For the L2.409.4.87.0, straps in polished black alligator with steel deployante are recommended for formal contexts, or vegetable-tanned calf leather in brown or havana tones for daily wear. Dark burgundy shell cordovan represents a sophisticated option for those seeking colour evolution over time. A heavy-weave NATO in grey or cream fabric offers summer versatility whilst maintaining the watch's understated elegance.

To change the strap, position the watch on a stable surface with the lugs facing upward. Using a dedicated spring bar tool, gently press toward the centre of the lug to release the internal spring. Remove the spring bar from the old strap and insert the new one, ensuring the spring clicks into position with an audible 'click'. Verify centralisation before wearing the watch.

Yes, aftermarket straps with an 18mm lug width are fully compatible with the L2.409.4.87.0. We recommend selecting specialised manufacturers that guarantee construction quality (vegetable-tanned leathers, resistant stitching, precision spring bars). Straps from milanostraps.it are handcrafted with selected leathers and customisable in width, initials and stitch colour.

A quality leather strap has an average lifespan of 3-5 years, depending on intensity of use and care. Alligator or vegetable-tanned shell cordovan straps tend to last longer, developing a natural patina over time. Natural ageing of leather is considered an aesthetic virtue, not a defect. Casati Milano offers an 18-month warranty on bespoke straps and recommends periodic maintenance with neutral balm to preserve softness.