Strap for Master Collection 42 24h Stainless Steel / Black-Roman / Bracelet

The lug width of the Longines Master Collection L2.718.4.51.6 is 20 millimetres. This dimension is determined by the proportion between the case diameter (42 mm) and its constructive architecture. The 20 mm standard represents the balance point for classical watches in this size range, ensuring visual harmony and compatibility with the extensive range of artisanal straps available online.

Strap selection depends on intended use. For formal contexts, alligator with vegetable tanning or shell cordovan are recommended, emphasising the classical nature of the watch and developing authentic patina over time. Smooth aniline calf offers versatility between formal and casual wear. For a sporty approach, NATO and silicone rubber guarantee practicality without aesthetic compromise. Compatibility is universal for the 20 mm lug width.

Strap replacement is accomplished via the spring bars positioned at the lug extremities. Using a specialist extraction tool (spring bar remover), compress the spring and withdraw the bar. Once the worn strap is removed, insert the new one by aligning the holes with the bars and releasing the spring. The operation requires precision to avoid scratching the case. Milanostraps.it provides visual and technical support for installation.

Yes, entirely. The 20 millimetre lug width is a widespread standard, compatible with any artisanal or industrial strap of the same dimension. Quality aftermarket straps do not compromise structural integrity or aesthetics. Rather, interchangeability permits style adaptation according to occasion and season, fully exploiting the versatile potential of this Longines.

Leather strap longevity depends on type and usage. Vegetable-tanned alligator and shell cordovan, if properly maintained, last 5–7 years of daily wear. Smooth aniline calf tends to wear more rapidly (3–5 years) as it absorbs moisture and develops patina. Critical factors include: sweat exposure, seasonal humidity, and frequency of rotation between straps. Casati Milano guarantees 18 months on artisanal work, ensuring durable construction quality.