Strap for Master Collection Date 36 Two Tone Diamond

The lug width of the Longines Master Collection L2.518.5.37.7 is 19 millimetres. This measurement represents the standard construction specification for this family of 36mm diameter watches and guarantees balanced proportions between the case and strap. Correct measurement is taken by positioning a digital calliper between the two attachment pins, measured inside-to-inside.

For the Master Collection L2.518.5.37.7, the ideal strap depends on intended usage. Dark brown or cognac alligator amplifies the dignity of the yellow gold on the bi-colour case; black calf emphasises the steel fraction and maintains a contemporary, composed look. For those seeking dynamism, fine-grain calf captures light in articulated fashion. For travel and informal contexts, high-modulus rubber ensures versatility without sacrificing the formal elegance inherent to the timepiece.

Changing the strap on the Longines Master Collection L2.518.5.37.7 requires extraction of the attachment pins (lugs) using a specialised tool called a spring bar tool. Position the watch face-down on a soft surface, locate the small holes on the shoulder of each lug, insert the tool to compress the internal springs and push the pin outward. Repeat symmetrically, then slide the old strap downward. Insert the new strap in reverse, ensuring pins are fully seated before releasing pressure.

Yes, aftermarket straps of quality construction meeting the 19mm lug width specification are entirely compatible with the Longines Master Collection L2.518.5.37.7. MilanoStraps supplies 19mm straps customisable in material (alligator, calf, rubber), colour, initials and stitching thread, ensuring construction quality that does not compromise the value and elegance of the Swiss timepiece. The Casati Milano atelier additionally offers personalised consultancy on chromatic and material choices.

The lifespan of a leather strap depends on frequency of use, environmental conditions and quality of tanning. A high-quality alligator or calf strap, vegetable-tanned, has an average lifespan of 3–5 years under daily wear conditions. Prolonged exposure to moisture, direct sunlight and perspiration may reduce this timeframe. MilanoStraps guarantees 18 months on straps realised at the Casati Milano atelier. Periodic maintenance—gentle drying after water contact, protective treatments every 6–12 months—significantly extends strap lifespan.