Strap for Master Collection Date 36 Stainless Steel MOP

The lug width of the Longines Master Collection L2.518.4.88.6 is 19 millimetres. This measurement is specific to the 36mm case diameter and represents the correct strap width for compatible replacements. To verify, use a digital calliper, positioning it between the case lugs: the measurement must be taken from the centre of one bar to the centre of the other, disregarding the pin thickness itself.

The optimal strap selection depends on intended use. For classical elegance, we recommend alligator in dark tones (black or cognac brown), which emphasises the case's linear design. For everyday versatility, vegetable-tanned calf leather ensures immediate comfort and develops a desirable patina over time. Alligator represents the most sophisticated solution, whilst a NATO fabric offers practicality for informal settings without compromising the Master Collection's essential aesthetic.

Strap replacement requires removal of the case lugs' spring bars. Using a dedicated spring bar remover tool, apply gentle inward pressure on the case to release the bar ends from the previous strap. Once extracted, insert the pins into the new strap, aligning the ends with corresponding holes, then gently push until they click into position. This operation requires care to avoid scratching the case.

Any strap with a 19mm lug width is compatible with this model. MilanoStraps offers customisable aftermarket straps in alligator, vegetable-tanned calf, shell cordovan and other finishes, with options for length, initials and custom stitching thread. Compatibility is guaranteed by the standard 19mm width, irrespective of material or buckle finish.

Leather strap durability depends on material type and usage. An alligator or shell cordovan strap with vegetable tanning can last 5-10 years with proper maintenance, developing a desirable patina over time. Standard calf leather typically lasts 3-5 years. Constant exposure to humidity, direct sunlight and aggressive cleaners reduces longevity. The 18-month guarantee offered by Casati Milano covers manufacturing defects during the first eighteen months of use.