Strap for Conquest Heritage 40 Stainless Steel / Silver

The Longines Conquest Heritage L1.650.4.72.2 features integrated lugs with a width of 20mm. This dimension is the distance between the springbar fixing pins and is essential for selecting compatible straps. You can verify it by measuring with a digital calliper positioned perpendicularly across the midline of the lug: the value should read 20mm, with minimum tolerance down to 19.5mm.

The choice depends on how you wear the watch. For formal occasions and evening wear, we recommend a satin-finished alligator in warm cognac brown or a premium shell cordovan—both enhance the technical character without ostentation. For daily use with sporty activities, a black vulcanised rubber strap (FKM) maintains constant comfort and resists chlorine and saltwater. A vegetable-tanned calf leather offers the ideal compromise: softness on the wrist, natural patina development over time, understated aesthetics.

The process is straightforward and requires no specialised tools. Position the watch with the caseback facing upward, locate the small holes at the ends of the lugs (where the current strap is attached). Use a springbar tool (or a blunt-edged object like a dull knife blade) to push the retaining pin downward, releasing the old strap. Insert the new strap by aligning its holes with the lug pins, then press until you hear a click of secure engagement. Verify that the strap is firmly attached on both sides.

Yes, absolutely. Any strap with a 20mm lug width is mechanically compatible with your Conquest Heritage. The key is ensuring the strap has adequate total length for your wrist (typically 75–80mm from the buckle to the first adjustment hole) and that thickness does not exceed 4mm, to avoid play in the fixing pins. We recommend straps of equivalent or superior build quality to the original: vegetable-tanned leather, satin-finished steel buckles, double-stitched thread work.

The lifespan of a leather strap depends on material, tanning method, and intensity of use. An alligator or vegetable-tanned calf, worn daily, maintains structural integrity for an average of 4–6 years; a premium shell cordovan can last 8–10+ years. Visible wear (edge thinning, repeated flexure marks) typically begins after 18–24 months of daily use, but does not compromise functionality. A vulcanised rubber strap has superior longevity (8–12 years) and is immune to drying and stiffness. To extend the life of a leather strap, avoid prolonged direct moisture exposure and rotate with other straps, allowing the leather to 'rest'.