Strap for Evidenza 30.5 Chronograph

The lug width of the Longines Evidenza L2.156.4.51.6 is 16mm. This measurement is specific to the Evidenza family and proportionate to the 30.50mm case diameter. To verify compatibility, measure the distance between the two lugs (strap attachment points): it should be exactly 16 millimetres.

Dark brown alligator is the natural choice for the L2.156.4.51.6, as its fine and regular texture reflects the Art Déco aesthetic of the model. Shell cordovan in bordeaux or cognac tones offers a patina that evolves over time. For those preferring alternatives, vegetable-tanned calf and cotton NATO straps represent valid and versatile options.

Strap replacement occurs through the spring bars that secure the strap to the lugs. Use a dedicated spring bar tool to compress the internal spring of each bar, allowing you to remove the strap from its attachment points. Repeat the procedure in reverse to install the new 16mm strap, ensuring it is perfectly aligned.

Yes, any aftermarket 16mm strap is compatible with the L2.156.4.51.6, as they utilise the same standard spring bar system. However, it is essential to verify that the new strap has been crafted with quality materials and correct proportions for this tonneau case, so the overall aesthetics of the model are not compromised.

The lifespan of a leather strap depends on wear frequency and material quality. An alligator or shell cordovan strap, if worn daily, may last 2-4 years before requiring replacement. Vegetable-tanned leather offers greater durability. Longevity increases significantly if the watch is not worn during activities that expose the leather to excessive moisture or mechanical stress.