Strap for Master Collection Chronograph 40 Stainless Steel / Black - Roman / Strap

The lug width of the Longines Master Collection L2.629.4.51.5 is 20mm. This measurement represents the distance between the spring bar pins that attach the strap to the case. Verifying this dimension before purchasing an aftermarket strap is essential, as an incorrectly sized strap will not fit the case.

For the Longines Master Collection L2.629.4.51.5, straps in vegetable-tanned alligator, burgundy shell cordovan, or soft calfskin are recommended for a classical aesthetic. For sportier interpretations, rubber or NATO fabric straps in neutral tones work excellently. Choice depends on intended use: formal occasions require quality leather, daily wear permits greater versatility.

Strap replacement is a straightforward operation: position the watch on a soft surface. Using a spring bar tool or small screwdriver, press the small elastic pin securing the lug to the strap and carefully extract it. Repeat on the other side. Insert the new strap by threading the pins into their housings and ensure they click into position. The procedure requires less than one minute per side.

Yes, the L2.629.4.51.5 is fully compatible with quality 20mm aftermarket straps. MilanoStraps offers an extensive selection of certified straps in alligator, shell cordovan, calfskin and fabric, customisable in length, initials and stitching thread. Compatibility is guaranteed by adhering to the 20mm lug width standard.

Leather strap longevity depends on material and usage. Vegetable-tanned alligator and shell cordovan guarantee 3–5 years of moderate daily wear. Softer calfskin typically lasts 2–3 years. Factors such as perspiration, sunlight exposure and maintenance affect durability. Quality leathers develop natural patina that improves aesthetics over time. Rubber or fabric straps last 5+ years with routine care.