Strap for Master Collection Date 36 Two Tone Roman

The lug width of the Longines Master Collection L2.518.5.11.7 is 19mm. This measurement is essential for aftermarket strap compatibility: it must be measured in millimetres between the inside of the two spring bars that attach the strap to the case. In this reference, 19mm ensures broad compatibility with most artisanal straps available on the market.

The best strap depends on intended use and desired aesthetic context. For formality and conservative daily wear, dark brown calf leather with vegetable tanning is the ideal choice. For those seeking balance and natural patina development, alligator in cognac brown or shell cordovan offer superior longevity and develop visual character over time. The material should feature a medium-fine and natural grain, never glossy or excessively coarse, to remain coherent with the Master Collection's minimalist design code.

Strap replacement is a straightforward procedure requiring a specialised tool (strap change tool with interchangeable tips) or a small flat lever. Position the watch on a stable surface, locate the small hole at the extremities of the lugs where the spring bars are housed, and gently press the tool tip to retract the pin, allowing the old strap to be removed. Repeat on the opposite lug. Inserting the new strap is the reverse process: align the holes, apply gentle pressure until the spring bar clicks into place. It is advisable to seek assistance from a watchmaker if you are inexperienced.

Yes, quality aftermarket straps are available for the 19mm lug width. On milanostraps.it you will find a curated selection of artisanal straps in various materials: alligator, calf leather with vegetable tanning, shell cordovan and natural leather. All are customisable in exact fit, colour and details such as initials and stitching thread. The Casati Milano atelier offers a bespoke creation service with personal consultation and an extended 18-month warranty.

The durability of a leather strap varies depending on material quality, frequency of use and maintenance practices. Quality calf leather with daily wear will resist 2-3 years before showing noticeable wear at the lugs. Alligator and shell cordovan, thanks to fibre density, achieve 4-6 years of intensive use. Straps with vegetable tanning develop a natural patina that enhances their aesthetic over time without necessarily compromising functionality. Periodic maintenance (gentle cleaning, natural air drying, avoiding prolonged water exposure) significantly extends the strap's service life.