Strap for Master Collection Chronograph

The Longines Master Collection L2.669.4.51.7 features a 20-millimetre lug width. This dimension is crucial for strap compatibility and must be measured perpendicularly between the shoulders of the case lugs, excluding the lug thickness itself.

For this classical chronograph, dark brown or black alligator represents the most elegant choice, emphasising the dress-sports character of the model. Vegetable-tanned calfskin offers natural patina and aesthetic evolution over time. Charcoal NATO straps are ideal for daily sports wear without compromising elegance.

Removing the strap requires a spring bar tool to compress the springs at the ends of the lugs. Insert the tool into the small space between case and strap, gently compress the spring, remove the lug pin, and repeat on the other side. To install a new strap, align the lugs and reinsert the pins until the spring clicks.

Yes. Quality aftermarket straps may be used provided the lug width is precisely 20 millimetres. Milanostraps.it offers artisanal leather straps of superior quality, customisable in sizing, initials and stitch colour, providing an elegant alternative to original straps whilst maintaining complete mechanical compatibility.

A quality leather strap, worn daily with rotation amongst other straps, typically lasts 3-5 years before replacement is warranted. Climate, sun exposure, humidity and frequency of wear influence longevity. Vegetable-tanned leather ages gradually, developing character; premium-grade leather maintains structural integrity longer than chrome-tanned alternatives.