Strap for Master Collection Date 25.5 Stainless Steel / Silver / Bracelet

The lug width of the Longines Master Collection L2.128.4.78.6 measures 13mm. This is a specific dimension for this 25.50mm case configuration and represents an uncommon standard in ladies' watchmaking. It is essential to verify compatibility before purchasing an aftermarket strap, as manufacturing tolerances are tight: a strap with a 12.8-13.2mm lug width will fit correctly, whilst larger deviations will result in undesirable play or insertion difficulties.

The optimal strap choice depends on intended use and dial colour. Alligator leather represents the most elegant aesthetic choice, with natural grain that dialogues perfectly with the case's sobriety. Vegetable-tanned calf is ideal for daily wear, developing a natural patina over time. Shell cordovan offers unrivalled durability and chromatic depth. For sporadic use, NATO fabric or rubber provides practicality, though less suited to the Master Collection's formal elegance. Professional guidance from Casati Milano atelier ensures the perfect match.

To change the strap, procure a precision spring bar tool and a well-lit workspace. Locate the small spring securing the spring bar: applying gentle inward pressure with the tool will retract the spring, permitting bar extraction. Remove the old strap by liberating one end, then the other. Insert the new strap by aligning the holes with the spring bar ends and reinserting the bar, ensuring both springs click into position correctly. To avoid any risk of damage, entrust this operation to a specialised service such as Casati Milano atelier.

Absolutely. You may use a certified aftermarket strap with 13mm lug width, provided it meets quality standards. Straps from milanostraps.it are crafted with certified artisanal methods using premium leathers (alligator, calf, shell cordovan) and guarantee maximum compatibility with the Longines L2.128.4.78.6. It is essential to select a strap with maximum thickness of 3.5-4mm in the lug passage zone to avoid mechanical play or insertion difficulty.

Leather strap durability depends on material quality, frequency of use and exposure conditions (humidity, sunlight, temperature variation). A premium alligator strap may last 5-7 years with regular use and proper maintenance (periodic cleaning, conditioning with natural oils, storage away from excess humidity). Vegetable-tanned calf presents similar lifespans, whilst shell cordovan may exceed 10 years thanks to the material's inherent resistance. Straps supplied by Casati Milano carry an 18-month warranty and may benefit from professional restoration services at end of life.