Strap for Master Collection 38.5 Day Date Stainless Steel / Black-Roman / Alligator

The Longines Master Collection L2.755.4.51.8 features a lug width of 20 millimetres. This dimension is specific to the model and is critical when selecting a replacement strap. It is essential to verify that your chosen strap has exactly 20 mm width at the case attachment points, as incorrect lug dimensions will not fit the case lugs properly.

For the Master Collection L2.755.4.51.8, we recommend alligator leather in tobacco brown or black: its natural grain enhances the understated stainless steel case whilst maintaining the model's aesthetic versatility. Shell cordovan represents a premium alternative for those who appreciate intrinsic luminosity and patina development over time. Structured calf leather offers a uniform texture, ideal for personalised colour combinations.

The strap is removed by extracting the spring bars that connect it to the case lugs. Using a dedicated tool—often included in strap change kits—you press the internal spring mechanism of the bar to release one end of the strap, then carefully extract the bar itself. Repeat this operation on the opposite side. Installation of the new strap follows the same procedure in reverse. If you are not experienced, we recommend consulting a trusted watchmaker or Casati Milano atelier to prevent damage.

Yes, any strap with a 20 mm lug width is compatible with the L2.755.4.51.8, regardless of brand. This includes premium leathers (alligator, cordovan, calf), textile materials (NATO, canvas), rubber and steel options. Compatibility depends solely on lug width, not on the strap manufacturer.

A quality leather strap (alligator, cordovan, calf) typically lasts 3-5 years with daily wear, depending on factors such as frequency of use, climate, perspiration and maintenance. Vegetable-tanned leathers tend to develop a patina that ages gracefully, visually extending the strap's useful life. Casati Milano's warranty on bespoke straps is 18 months, covering manufacturing defects and anomalous structural variations.