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

The lug width of the Longines Master Collection L2.128.4.77.6 is 13 millimetres. This measurement is specific to the ladies' model and is determined by the reduced case diameter of 25.5mm. To verify it, position a digital calliper between the two lugs (the lateral protrusions of the case) and measure the internal distance: the value must correspond exactly to 13mm. It is essential not to confuse internal width with external width, as an error would lead to purchasing incompatible straps.

Alligator leather in vegetable tanning represents the most traditional and harmonious choice: its natural grain evolves over time, creating an intimate and sophisticated patina. Smooth box calf offers uniformly elegant finishing, ideal for formal contexts. Shell cordovan guarantees compact structure and natural lustre without frequent maintenance. For absolute versatility, NATO straps in fabric or natural rubber allow quick changes and require zero preventive care. The buckle should respect the case finish: satin for continuity, polished for contrast.

Strap changes require a spring bar tool (a dedicated instrument) to insert or remove the lugs from the case. Position the watch with the lugs facing upward. Insert the flat end of the tool into the lug slot to release the internal spring, then gently slide the strap outward. Repeat the operation on the opposite lug. To fit the new strap, align the holes with the lugs and press until the spring clicks into place. Always be careful not to scratch the case during the operation.

Absolutely. Any strap with a 13mm lug width is mechanically compatible. The important thing is to choose an artisanal quality strap, made with premium leathers (alligator, shell cordovan, calf), in order to respect the high quality standard of the timepiece. Avoid cheap or synthetic straps, which would contrast the refined identity of the Master Collection. Artisanal straps also allow you to personalise lengths, finishes, stitching and colours according to your aesthetic preferences.

A premium leather strap (alligator, calf, shell cordovan) maintains optimal condition for 4-6 years with daily use and ordinary maintenance: keep the leather dry, avoid prolonged exposure to direct sunlight and excessive humidity, and occasionally apply creams specific to aniline leathers. Longevity depends on the intensity of use, climate and tanning method chosen. Vegetable tanning develops a patina that improves over time. Straps with an 18-month guarantee (such as those from Casati Milano) ensure tested materials and structured stitching for lasting durability.