Longines
Conquest Classic L2.286.4.52.6— lug 15mm

The lug width (misura ansa) of the Longines Conquest Classic L2.286.4.52.6 is 15mm. This measurement represents the internal distance between the metal tubes that support the strap. It is essential to verify this dimension with a digital calliper before purchasing an aftermarket strap, as even minor variations (such as 14mm or 16mm) would result in misalignment and compromise wearing security.

The ideal material depends on your intended use. Alligator is the luxury choice: it offers natural grain, increasing softness over time, and develops authentic patina. Vegetable-tanned or chrome-tanned calf leather is versatile, colour-stable, and suitable for frequent changes between different environments. NATO fabric straps guarantee sporting practicality and quick swap capability. Many owners maintain a dark alligator strap for formal occasions and a light calf strap for summer daily wear.

Strap replacement on the Conquest Classic is accomplished by removing the spring bar (spring bar removal). Position your watch with the lug facing upward, use a dedicated tool (pry bar or remover tool) to gently press inward one of the two ends of the spring bar, releasing the metal tube from the lug hole. Repeat on the other side. Insert the new strap (15mm size) by aligning the tubes with the lug holes, then press until you hear the spring bar click into position. Verify that the spring bar is fully inserted before wearing the watch.

Yes, high-quality artisanal aftermarket straps in 15mm size are available. Milano Straps offers an online collection of customizable 15mm straps in materials (alligator, calf, NATO, rubber), colours, total length, and stitching thread. The Casati Milano atelier also crafts bespoke straps by appointment with direct leather selection, 18-month warranty, and personalized WhatsApp assistance.

The lifespan of a leather strap varies depending on material quality, usage, and maintenance. Good-quality vegetable-tanned calf leather maintains structural integrity for 3-5 years of daily wear. Alligator, being more robust, can last 5-7 years or longer, especially if not exposed to excessive moisture or sudden temperature swings. Factors reducing longevity include intense perspiration, prolonged direct sunlight exposure, and lack of periodic cleaning. The 18-month warranty provided by Casati Milano covers manufacturing defects and ensures restoration interventions if necessary.