Strap for Master Collection Date 25.5 Stainless Steel - Yellow Gold / White - Roman / Bracelet

The lug width of the Longines Master Collection L2.128.5.11.7 is 13mm. This measurement represents the distance between the lugs, and is the standard specification for this ladies' collection. Every strap intended for this watch must have an internal passage of exactly 13mm to ensure precise and stable mounting.

The most appropriate strap depends on usage and aesthetic preferences. Natural alligator offers maximum elegance and visual proportion, respecting the delicate lines of the two-tone case. Vegetable-tanned calf leather is the versatile alternative, with evolving patina over time. For sporty contexts, canvas NATO ensures moisture resistance. Burgundy or chocolate brown alligator enhances the yellow gold, whilst black or deep blue creates modern contrasts.

Strap replacement requires the use of a spring bar tool. Gently remove the spring that supports the pin from the underside of the lug, extract the pin, and remove the original strap. Insert the new strap by aligning the holes with the watch case pins, reinsert the spring bar by compressing it slightly until it seats in the pin groove. If you are not experienced, a professional watchmaker will complete the operation in minutes without risk.

Yes, any artisanal strap with a 13mm lug width is perfectly compatible. Quality aftermarket straps, made from alligator, shell cordovan, vegetable-tanned calf, or rubber, fit the original pins without modification. The important aspect is verifying that the internal passage is exactly 13mm. A bespoke strap of superior craftsmanship can actually enhance the case proportions compared to standard OEM straps.

Durability depends on leather quality and usage patterns. An artisanal alligator or shell cordovan strap typically lasts 4-7 years with daily wear, developing a fascinating patina. Vegetable-tanned calf has similar longevity, 4-6 years, with attractive ageing characteristics. Factors such as humidity, perspiration, sun exposure, and frequency of wear influence lifespan. Artisanal straps from Casati Milano carry an 18-month guarantee, but with proper maintenance and rotation with other straps, their useful life extends significantly beyond this period.