Strap for La Grande Classique Automatic 36 Stainless Steel / Yellow Gold PVD / Champagne

The Longines La Grande Classique L4.898.3.37.7 features a lug width of exactly 18 millimetres. This dimension is specific to the medium-format models within the collection and represents a more delicate specification compared to contemporary standards of 20mm or 22mm. To verify it, remove the spring bar from the lateral lugs of the case and measure the distance between the two holes with a digital calliper.

The ideal strap depends on your aesthetic interpretation of the watch. Alligator in taupe brown or cognac represents the most classical choice, with a rectilinear grain that echoes the dial's geometric purity. Smooth calf leather offers maximum sobriety and refinement. For greater versatility, a NATO strap in heavy-weight cotton canvas ensures summer comfort and practicality. Vulcanised rubber with rectilinear texture creates an interesting dialogue between formality and modernity. The right choice is the one that reflects your daily use of the timepiece.

The process is straightforward and requires no specialised tools. Locate the spring bar that connects the strap to the lateral lugs of the case. With gentle lateral pressure or a dedicated tool (often provided with quality straps), compress the bar and slide it out of the eyelet. Repeat for the other side. Insert the new strap by aligning the holes and verify that both eyelets adhere firmly to the spring bar. If unsure, a professional watchmaker will complete the operation in minutes.

Yes, online you will find a selection of 18mm straps ready for dispatch, customisable in lengths, initials and stitching thread. For a complete artisanal experience, you may also commission a bespoke strap from the Casati Milano atelier, where you can personally select the leather, receive WhatsApp updates during production and benefit from an 18-month warranty.

The lifespan of a leather strap depends on the quality of the material, frequency of use and care. A high-quality artisanal leather strap (alligator, vegetable-tanned calf, shell cordovan) typically lasts between 3 and 5 years if worn daily, or 5-7 years with less frequent use. Critical factors are exposure to moisture, perspiration and temperature fluctuations. Regular maintenance—gentle cleaning and occasional conditioning with specialist products—significantly extends the strap's life. When entrusted to a skilled craftsman, the strap will be constructed with triple-layer stitching, guaranteeing a more robust and durable structure.