Strap for Master Collection Date 25.5 Stainless Steel - Diamond / MOP / Bracelet

The lug width of the Longines Master Collection L2.128.0.87.6 is 13mm. This measurement refers to the external distance between the case lugs. It is essential to measure correctly to avoid incompatibility: the measurement must be taken from the outer edge of one lug to the outer edge of the other, not considering the internal diameter of the spring bar slot.

For the Master Collection L2.128.0.87.6, we recommend alligator for uncompromising elegance, vegetable-tanned calf leather for a patina that ennobles over time, or shell cordovan for those seeking material absoluteness. For informal contexts, canvas NATO or rubber maintain practicality without sacrificing the understated aesthetics of the model.

Strap replacement requires removal of the spring bars using a dedicated tool (spring bar tool). Insert the flat blade gently under the spring bar, apply downward pressure to compress the internal spring, then extract the pin. Repeat on the other side. Install the new strap following the reverse procedure, ensuring the bars are firmly seated in the case attachments.

A 13mm aftermarket strap is compatible dimensionally; however, we recommend verifying that the strap thickness (approximately 3-4mm) does not create excessive tension on the spring bars. High-quality alligator and calf leather ensure natural drape and superior longevity compared to low-profile materials.

Leather strap longevity depends on material and usage. Alligator guarantees 4-6 years in daily use; vegetable-tanned calf 3-5 years. Shell cordovan, being particularly robust, can exceed 6 years. Regular maintenance—avoiding frequent water exposure and occasionally applying specific conditioner—significantly extends longevity.