Strap for Saint-Imier Chronograph

The lug width (ansa misura) of the Longines Saint Imier L2.753.5.72.0 is 18 mm. This is a standard dimension for classical chronographs of this case size (39 mm diameter). The measurement should be taken internally between the two metal lug shoulders using a calliper or ruler.

Alligator leather is the most coherent choice with the aesthetic identity of this classical chronograph. Choose tones such as hazelnut, cognac, or black depending on the prominence you wish to confer upon the bi-colour case. Vegetable-tanned calf offers a solid alternative, with tactile character and the ability to age naturally. The irregular grain of alligator creates three-dimensional texture that enhances the details of the rose gold and steel case.

The change is performed using a spring bar tool (small, flat instrument): insert the blade between the metal lug and the retention bar, exerting gentle pressure to release it downward. Repeat on both sides. The new strap is mounted by reversing the procedure, ensuring that the spring bar clicks firmly into position. Avoid sharp blows to prevent damage to the case.

Yes, any strap with an 18 mm lug width is compatible with the Longines Saint Imier L2.753.5.72.0. Compatibility depends exclusively on the lug width, not on the watch brand. We recommend verifying that leather thickness is contained (1.4–1.6 mm) to maintain harmonious proportions and facilitate closure of the deployante if present. Online you will find a wide selection of artisanal 18 mm straps ready for shipment.

Durability depends on material, frequency of use, and climate. A quality alligator with vegetable tanning lasts 3–5 years with moderate daily use, ageing naturally. Structured calf has similar durability (3–4 years) with careful maintenance. In humid climates or with frequent perspiration, durability is reduced to 2–3 years. A vegetable-tanned strap allows periodic refurbishment of the band whilst keeping the original body. It is advisable to rotate between two straps to extend overall lifespan.