Strap for Saint-Imier Chronograph

The lug width of the Longines Saint Imier L2.753.5.72.7 is 20mm. This measurement indicates the internal space between the lugs where the strap must fit. To verify compatibility, measure the space with a digital calliper: the strap must slide with minimal play of 0.2-0.3mm to ensure correct assembly with the spring bars.

Alligator leather represents the most faithful choice to the model's tradition. Regular grain and fine texture enhance the rose gold-steel combination. For a more casual profile, smooth calf or shell cordovan offer equivalent structural quality. NATO straps are not recommended for this model, as they diminish the inherent elegance of the case.

The strap is changed using the spring bars located at the ends of the lugs. Required tools: a spring bar tool and a clean surface. Insert the tool under the bar, release tension, extract the bar, remove the old strap and insert the new one. Ensure the bar clicks correctly in both positions. If unfamiliar with the procedure, consult a professional watchmaker.

Yes, any 20mm strap is compatible with the L2.753.5.72.7, provided it is crafted to quality standards consistent with the watch. milanostraps.it offers a selection of 20mm straps customisable in sizes, colours and finishes. For a bespoke experience, Casati Milano creates handcrafted straps with personal leather selection and 18-month warranty.

Durability depends on material and usage: premium alligator develops patina over 5-7 years with regular wear; smooth calf maintains structural integrity for 3-5 years before showing natural wear signs; shell cordovan, thanks to fibre density, can last 7-10 years developing deep patina. Wear frequency, sun exposure and humidity significantly influence longevity. Proper maintenance (conditioning with neutral creams, quick drying after water contact) extends strap life.