Strap for Conquest 29.5 Quartz Stainless Steel

The lug width of the Longines Conquest L3.258.4.16.6 is 15mm. This measurement represents the horizontal distance between the case lugs, where the strap is inserted. It is essential to verify this measurement with a digital calliper before purchasing an aftermarket strap, as an incorrect width would make the strap incompatible.

For the Conquest L3.258.4.16.6, we recommend a high-quality alligator leather in black or dark brown, which enhances the geometric elegance of the case, or a smooth calf leather with vegetable tanning that develops natural patina over time. For more versatile wear, a cotton-silk NATO or an FKM rubber strap are modern and functional options.

The strap is changed by removing the spring bars located inside the case lugs. Using a dedicated tool (spring bar remover) or a small screwdriver, press the spring towards the centre to extract the pin, remove the old strap and insert the new one, reinserting the pin into the lug holes. The process requires precision to avoid scratching the case.

Yes, there are numerous quality aftermarket straps made specifically for the 15mm lug width. The finest are crafted in natural alligator, structured vegetable calf, shell cordovan or FKM rubber. Milano Straps offers a comprehensive collection of 15mm straps fully customisable, with options for thickness, colour and finishing types (couture stitching, quilted, etc.).

The longevity of a leather strap depends on material quality and usage. A quality alligator or vegetable calf strap used normally (daily but not exposed to excessive moisture) typically lasts 3-5 years. A shell cordovan strap can last 5-8 years as this leather is more durable. Changing straps periodically allows you to preserve your main strap and vary your watch's style.