Strap for Saint-Imier Chronograph

The Longines Saint Imier L2.784.4.73.6 features a 20 mm lug width. This measurement is taken between the inner edges of the lugs and determines compatibility with any aftermarket strap of the same width specification.

The optimal choice depends on intended use. For formal occasions, an alligator strap in cognac brown or black enhances the chronograph's elegance. For daily wear, calf leather provides suppleness and versatility. For sporting contexts, NATO or vulcanised rubber straps are ideal. The dial colour (black or blue) should guide your chromatic selection.

You will require a spring bar tool and fine-tipped tweezers. Position the tool on the internal spring of the lug, apply downward pressure to release the pin, then extract the spring bar. Repeat for both sides. Insert the new strap by guiding one lug ball into the hole first, then gently push to seat the spring. Verify secure engagement before wearing.

Yes, any strap with a 20 mm lug width is compatible. Artisanal leather straps crafted from vegetable-tanned or alligator leather offer superior quality to industrial alternatives. Ensure the lug balls are proportionate (typically 2 mm diameter) and that the holes are sufficiently wide to accommodate spiral spring bars.

Durability depends on frequency of wear, climatic conditions, and material grade. A premium alligator or calf strap worn daily typically lasts 2–4 years before replacement becomes necessary. Vegetable-tanned leather matures aesthetically over time, developing a rich patina. Minimise prolonged water and humidity exposure to extend longevity.