Strap for Saint-Imier Date 38.5

The lug width of the Longines Saint Imier L2.766.4.72.6 is 20 millimetres. This measurement corresponds to the distance between the two horizontal spring bars that connect the case to the strap. It is one of the most common widths in men's classic-sports watches, ensuring a wide selection of compatible straps both online and at specialist ateliers.

The ideal strap depends on usage and aesthetic preference. Alligator niloticus represents the most elegant and durable solution, with a fine grain that dialogues perfectly with the stainless steel case. Vegetable-tanned calf leather excels in chromatic versatility and natural patination over time. A cotton-polyester NATO offers practical everyday wear, whilst synthetic rubber is recommended for humid environments or heavy mechanical use.

To change the strap, you must remove the two horizontal spring bars that support the case. With a spring bar tool, compress each pin slightly and extract it from the hole. Once the lugs are free, the old strap slides away. The new 20-millimetre strap is inserted in exactly the same manner, ensuring the spring bars are securely locked. If you are unfamiliar with the procedure, a specialist watchmaker can complete the operation in minutes.

Yes, any strap designed for a 20-millimetre lug width is completely compatible with the Saint Imier L2.766.4.72.6. International standardisation of spring bars guarantees that straps from artisanal, sports, luxury or vintage brands fit perfectly. The important factor is verifying that the strap is compatible with the 20-millimetre width and that the cuts for the spring bars correspond to the case specifications.

The lifespan of a leather strap depends on the material and usage. Quality alligator, with minimal maintenance (protection from water, avoiding prolonged perspiration), lasts 5–7 years in intense daily use. Good-quality calf leather lasts 3–5 years with the same precautions. A shell cordovan strap, if treated carefully, can exceed 10 years. The most common failure occurs at the buckle (deployante) or stitching, not the leather itself. The patina that forms is added value, not deterioration.