Strap for Saint-Imier Date 38.5

The lug width of the Longines Saint-Imier L2.763.5.52.3 is 20 millimetres, measured as the inner distance between the two lugs. This specification complies with ISO 3110 standard for mid-to-high-end wristwatches. Any compatible strap must precisely meet this 20mm measurement.

The Saint-Imier L2.763.5.52.3 is particularly enhanced by alligator straps (with pronounced teina grain texture), shell cordovan, or vegetable-tanned calf leather. For daily wear, vegetable-tanned leather offers durability and progressive ageing aesthetics. For formal contexts, a black alligator strap with deployante clasp accentuates the bi-metallic case contrast (steel and rose gold). Avoid budget synthetic straps, which undermine the watch's positioning.

The strap is secured via spring bars that connect the lugs to the case. Use a spring bar tool to gently press inward and release the bar from one side, then remove the strap. Align the new strap's holes with the spring bar and snap it back into position. If uncertain, visit an official Longines service centre to prevent case damage.

Yes, provided the strap is specifically manufactured for 20mm lugs. Brands such as Milano Straps offer artisanal leather straps compatible with this model, customisable in leather type, colour, and details including initials or stitching thread. Always verify that the spring bar diameter (standard 1.6mm) matches and that strap thickness does not create friction against the case lugs.

A quality artisanal leather strap, under daily use, maintains structural integrity for 4–6 years before replacement is necessary. Shell cordovan resists longer (6–8 years), whilst vegetable-tanned calf develops visible creasing (patina) within 18–24 months but remains functional. Longevity varies according to ambient humidity, frequency of use, and maintenance (cleaning with damp cloth, air-drying).