Strap for La Grande Classique Quartz 29 Stainless Steel / MOP / Bracelet

The Longines La Grande Classique L4.512.4.87.6 features lug width of 16mm. This dimension is perfectly proportioned to the reduced case diameter (29mm) and represents the correct size for installing compatible artisanal straps. To verify the measurement, use a digital calliper measuring the distance between the lugs that support the spring bars.

For this model we recommend premium alligator straps that emphasise the minimalist elegance of the case. Smooth calf leather is a versatile alternative suited to both daily wear and formal occasions. Satin-finished rubber straps maintain correct proportions and offer practicality. NATO canvas straps can work but appear slightly oversized relative to the geometric proportions of the design.

Remove the watch from your wrist and position the case facing upward. Using a spring bar tool, gently lever underneath the lug pin to release the spring mechanism. Extract the pin completely along with the old strap. Insert the new strap, align the pin with the lug holes and press until you hear a click. Verify that the pin is fully secured on both sides.

Yes, any quality strap featuring 16mm lugs is compatible. Bespoke artisanal straps from milanostraps.it are customisable in material, colour, initials and stitching thread type. We recommend selecting straps of appropriate thickness (6-8mm) to maintain the minimalist elegance of the case and ensure correct lug positioning.

A premium leather strap (alligator or calf) typically lasts 2-4 years with moderate daily wear. Durability depends on intensity of use, water exposure, perspiration and periodic maintenance. The Casati Milano atelier guarantees 18 months on bespoke straps. Regular cleaning with a soft cloth and light conditioning annually significantly extends useful life.