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

The lug width of the Longines Master Collection L2.409.4.87.6 is 18mm. This measurement represents the distance between the inner edges of the two metal lugs protruding laterally from the case. Verifying this measurement with a calliper is essential to ensure strap compatibility before purchase.

For the Master Collection L2.409.4.87.6, straps in genuine alligator, grained calf, shell cordovan, or textile NATO are recommended. Alligator emphasises the classical case proportions; calf develops natural patina over time; shell cordovan offers humidity resistance; NATO maintains formality whilst allowing versatility. Choice depends on the dial and intended use.

The strap is changed using a specialised tool called a spring bar tool, which allows you to gently push the elastic pin (spring bar) that connects the strap to the lug. Position the tool tip in the small hole on the lug, press to release the pin, then remove the old strap and insert the new one. Handle with care to avoid scratching the case. If inexperienced, consult a specialist service centre.

Yes, any strap designed for an 18mm lug width is compatible with the Longines L2.409.4.87.6. You need only verify that the strap has two lugs (passants) of exactly 18mm in width. Milano Straps' bespoke artisanal straps are specifically crafted for this measurement and guarantee total compatibility with the model.

The lifespan of a leather strap depends on the material, frequency of wear, and maintenance. Genuine alligator and shell cordovan, when properly cared for, maintain structural integrity for 3–5 years of daily wear. Calf has a slightly shorter lifespan (2–4 years) due to fibre density considerations. Regular maintenance (soft-brush cleaning, occasional conditioning) significantly extends strap lifespan.