Strap for Conquest Automatic 39

The Longines Conquest L3.656.4.96.6 features a 19mm lug width, measured from the centre of one lug to the centre of the opposite lug. This dimension is specific to this generation and accommodates thicker strap materials, essential for supporting the weight of the stainless steel case.

Choice depends on intended use. For formal elegance, Hermès alligator with fine grain creates balance with the sunburst dial. For daily wear, vegetable-tanned calf develops rich natural patina over months. For sport contexts, Japanese shell cordovan offers initial rigidity and acquired suppleness. Tropic rubber remains ideal during summer months.

Locate the spring bar pins on the case sides, using a dedicated spring bar tool. Press the pin gently toward the case centre to release it, remove the old strap, and insert the new one whilst aligning it with the lugs. Ensure any deployante clasp faces the wrist. Each step requires precision to avoid scratching the case.

Yes, provided they are certified for 19mm lug width. Avoid generic 18mm straps (too narrow) or 20mm options (will not secure properly). Bespoke straps from Milano Straps are tested on Longines cases and guarantee compatibility and superior build quality compared to industrial alternatives.

A quality leather strap (alligator or vegetable-tanned calf) lasts 3–4 years with daily use and ordinary care. Ageing is not deterioration but aesthetic refinement: patina acquires character and unique tonality. With occasional wear or storage in cool environments, longevity extends beyond 5 years. The artisanal guarantee (18 months) covers construction defects.