Strap for Saint Imier Moonphase

The lug width of the Longines Saint-Imier L2.764.4.53.3 is 20 mm. This measurement represents the internal space between the case lugs where the strap is inserted. It is essential to measure the lug width correctly using a digital calliper, positioning the tool on the inner side of the attachment, not on the outer width of an already-mounted strap.

For the Saint-Imier L2.764.4.53.3, alligator straps are recommended for formal occasions, vegetable-tanned leather for discreet elegance, shell cordovan for durability and versatility, or NATO fabric for sporting applications. Choice depends on intended use: smoky brown or black alligator for business and evening wear, black leather for maximum formality, NATO fabric for daily practicality.

Strap replacement requires a spring bar tool. Position the tool in the lateral groove of the lug spring, compress gently to release pressure, and extract the spring outward. Repeat on both lugs. Insert the new strap into the case lugs, ensuring the spring clicks correctly into position. Never force: excessive compression damages the lugs.

Yes, completely compatible. The strap lug width need only be 20 mm. Quality aftermarket straps—in alligator, cordovan, leather, NATO—fit perfectly onto the Longines case attachment points. MilanoStraps offers a selection of 20mm straps tested for compatibility with this specific model.

Leather strap lifespan depends on material and wear. High-quality alligator or shell cordovan lasts 3–5 years with moderate daily use. Vegetable-tanned leather typically lasts 2–4 years. Longevity increases if the strap is protected from prolonged moisture and direct sunlight exposure. MilanoStraps straps are backed by an 18-month warranty through the Casati Milano atelier.