Strap for Conquest 38 Stainless Steel / Blue / Bracelet

The lug width of the Longines Conquest L3.720.4.92.6 is 19mm. This measurement represents the internal space between the lugs where the strap is inserted. To verify it accurately, use a digital calliper positioned on the inner lugs: the reading should fall between 18.8 and 19.2mm to ensure correct compatibility.

The Longines Conquest is engineered to work with alligator straps using vegetable tanning (emphasising formal elegance), vegetable-tanned calf leather (more supple and comfortable), technical NATO fabric (highlighting its exploratory heritage), or fluoroelastomer rubber (practical and resistant). Your choice depends on intended use: alligator for formal occasions, calf for daily wear, NATO for outdoor activities, rubber for diving. The steel case pairs coherently with all these solutions.

The process is straightforward: position the watch on a soft surface (microfibre cloth) with the caseback facing up. Locate the spring bars holding the strap in the lugs and use a spring bar tool to gently lever one side, lifting the bar. Repeat on the other side. Once the old strap is free, align the new strap with the lugs and reinsert the spring bars using the same tool, ensuring they click into place audibly on both sides.

Yes, aftermarket straps in 19mm are entirely compatible with the Longines Conquest L3.720.4.92.6. The lugs are standard and not brand-specific: any strap measuring 19mm in width will fit perfectly. Artisanal quality straps and materials such as alligator, vegetable-tanned calf, or shell cordovan often exceed original equipment standards, allowing customisation in colour, buckle finish, and stitching details.

Lifespan depends on usage, material, and treatment. A high-quality vegetable-tanned alligator strap lasts between 5 to 10 years of daily wear, developing a characteristic patina that increases aesthetic value over time. Vegetable-tanned calf has similar longevity but succumbs more readily to moisture exposure. Rubber and NATO straps exceed 10 years of sun exposure, although rubber tends to become opaque. The 18-month warranty on Casati Milano straps covers manufacturing defects; natural ageing constitutes normal wear.