Strap for Master Collection Date 29 Pink Gold Diamond

The lug width of the Longines Master Collection L2.257.9.87.3 is 15mm. This is the distance between the two attachment points of the case to the watch strap lugs. A 15mm lug width requires specifically manufactured straps for this dimension and is not compatible with standard sizes of 16mm or 18mm.

For a rose gold timepiece such as the L2.257.9.87.3, we recommend alligator in tobacco brown or calf leather with vegetable tanning. Alligator maintains elegant proportions without competing with the warmth of gold, while vegetable-tanned calf develops a natural patina that amplifies the precious reflections of the case. Avoid straps with saturated or high-gloss finishes that would create chromatic discord.

Strap replacement requires extraction of the spring bars that connect the lugs to the case. Use a dedicated spring bar tool to compress the spring and gently extract it. Install the new strap by inserting one spring bar at a time, ensuring the strap is perfectly aligned with the 15mm lugs. If you are not experienced, we recommend consulting a professional watchmaker.

No, this is not recommended. The L2.257.9.87.3 features specific 15mm lugs. A 16mm strap would cause excessive play on the lugs or, conversely, create installation difficulties. To maintain perfect fit and timepiece security, use exclusively 15mm straps manufactured for this specific lug width.

A quality artisanal leather strap (alligator or calf) typically lasts 3-5 years with daily wear, or up to 7-8 years if worn occasionally. Durability depends on exposure to moisture, perspiration, and UV rays. Vegetable-tanned leather ages more gracefully, developing patina, while chrome-tanned leather may wear more rapidly. Regular maintenance (cleaning with a damp cloth, occasional conditioning) significantly extends longevity.