Strap for La Grande Classique Quartz 23 Pink Gold

The lug width of the Longines La Grande Classique L4.191.9.11.0 is 12mm. This dimension is characteristic of Longines' ultra-compact models and is relatively rare in the aftermarket strap market. Lug width is measured by placing a digital calliper between the two spring bar lugs (the metallic pins protruding from the case) perpendicularly, from inside to inside. This reduced dimension reflects the minimalist architecture of the 23mm diameter case.

The most suitable strap is in off-white alligator or mogano shell cordovan. Alligator, with its regular texture and minimal weight, amplifies the formal elegance of the rose gold case; shell cordovan, with its natural lustre, creates a sophisticated chromatic harmony. For a practical daily-wear strap resistant to staining, medium-grey vegetable-tanned calf is an elegant alternative. We do not recommend black or cool-toned straps, as they create chromatic dissonance with rose gold.

Strap change is accomplished by extracting and inserting the spring bar lugs (the small metallic pins connecting the strap to the case). Use a spring bar tool (a small, fork-shaped instrument) to apply gentle pressure to one side of the pin and slide it outward. Perform this operation with care to avoid scratching the rose gold case. Once the old strap is removed, insert the new one by aligning the holes and pressing the pin until it clicks. If you are uncomfortable with this procedure, the Casati Milano atelier offers strap-change service in Milan.

Yes, you can use a quality artisanal aftermarket strap compatible with the 12mm lug width. Specialised brands such as Milan Straps offer superior quality and personalisation. The critical factor is verifying lug-width compatibility: it must be exactly 12mm. Standard straps (18mm, 20mm, 22mm) are not compatible with this model. The Casati Milano atelier creates bespoke straps in premium leather with an 18-month warranty, allowing personal selection of material and finishing.

The lifespan of a leather strap depends on intensity of wear, material type, and environmental conditions. A quality alligator strap, worn daily with care, typically lasts 3–5 years before requiring aesthetic replacement. Shell cordovan, owing to its intrinsic robustness, may last 5–7 years. Vegetable-tanned calf, though softer, offers an average lifespan of 2–4 years. Excessive humidity and direct sunlight exposure shorten longevity. Straps crafted by specialist ateliers such as Casati Milano, with quality stitching and selected tannage, tend to last significantly longer than industrial straps. Regular maintenance (gentle cleaning with a damp cloth, air-drying) extends strap longevity.