Strap for Master Collection 38.5 Day Date Stainless Steel / Silver-Diamond / Alligator XL

The Longines Master Collection L2.755.4.77.5 features 20mm lug width, measured between the inner edges of the spring bar posts. This is a standard size within the classical Longines segment. To verify, place a ruler perpendicular to the dial and measure the exact distance between the case lugs. Any compatible strap must have a 20mm lug width.

Alligator is the most elegant choice: its natural grain does not compete visually with the minimalist dial and resists wear for up to 15 years with proper care. Alternatively, smooth calf leather creates understated refinement and develops a rich patina over time. For practicality, a canvas NATO in heavyweight cotton offers versatility and easy changeability. Structured rubber is advisable if the watch accompanies aquatic activities.

The strap is secured via spring bar pins positioned on the case sides. Using a Spring Bar Tool, remove the small compressed spring that holds the pin in place: the old strap releases. Insert the new strap, positioning the lug holes onto the elastic pins, and compress the tool to reset the spring. Ensure the pin is fully seated before releasing. The procedure takes minutes and requires no specialised tools beyond the Spring Bar Tool.

Yes, absolutely. Any strap with 20mm lug width is compatible with the Longines Master Collection L2.755.4.77.5, regardless of manufacturer. Premium aftermarket straps (alligator, calf, heavyweight canvas NATO) often surpass original Longines straps in material quality, finish and durability. Milano Straps offers 20mm straps customisable in leather type, colour, lug dimension and stitch colour.

A quality leather strap (alligator, calf, vegetable-tanned) typically lasts 5–10 years with daily wear and proper maintenance. Humidity, perspiration, sun exposure and cleaning frequency all influence longevity. A well-maintained alligator strap can last up to 15 years. The lug area, subject to continuous flexing, deteriorates first; to extend service life, rotate between straps and store in a dry environment when not worn.