Strap for Conquest Quartz 29.5 Stainless Steel - Diamond / MOP

The Longines Conquest L3.300.0.87.6 features a lug width of 15mm. This measurement is taken between the inner shoulders of the case and is characteristic of vintage sports watches. Verifying this dimension prior to purchasing a strap ensures perfect fitment.

For the Conquest L3.300.0.87.6, we recommend alligator or vegetable-tanned leather straps, which enhance the sports aesthetic without bulk. Alligator offers refinement with regular grain; vegetable leather develops character with age. For intensive daily wear, a rubber or NATO fabric strap with steel deployante provides practicality and versatility.

Strap replacement is performed via the spring bars anchoring the strap to the lugs. Use a spring bar tool to gently depress the pin, slide out the old strap, and insert the new one. The pins must be correctly seated in the lug apertures (15mm) to avoid mechanical stress.

Yes, any 15mm strap is compatible with the Longines Conquest L3.300.0.87.6. It is essential to source straps of certified quality (natural leather, robust stitching, precise finishing) to respect the watch's value and longevity. Milano Straps provides fully customisable 15mm straps for this reference.

Durability depends on material and usage patterns. A vegetable-tanned leather or alligator strap typically lasts 3–5 years with moderate daily wear. With careful maintenance (avoiding prolonged moisture, regular cleaning), longevity can extend further. A rubber strap lasts 5–7 years. Milano Straps guarantees 18 months durability on all bespoke straps.