Strap for Hydroconquest Automatic 41 Blue

The lug width of the Longines HydroConquest L3.642.4.96.6 is 20 millimetres. This measurement refers to the distance between the two lugs of the watch case and is essential for selecting a compatible strap. All straps offered for this model must feature a 20mm width to ensure a precise and secure fit to the case lugs.

For the Longines HydroConquest L3.642.4.96.6, we recommend alligator or vegetable-tanned calf leather straps for elegant formal occasions, or rubber and NATO straps for sporting and aquatic use. Given the diving vocation of the model, a black rubber strap or a NATO passant maintains aesthetic and functional coherence. For those wishing to alternate, a dark brown leather strap offers a transition between formality and daily versatility.

Strap replacement is accomplished by extracting the spring bars that connect the strap to the lugs. Using a spring bar tool, push the internal mechanism of the bar to release it from one side of the case, remove the old strap and insert the new strap by aligning it with the lugs. Finally, reinsert the spring bar and verify that it is fully locked. If you are not experienced, we recommend entrusting the task to a professional watchmaker.

Yes, any artisanal strap with a 20mm lug width is perfectly compatible with the Longines HydroConquest L3.642.4.96.6. Aftermarket straps offer the opportunity to personalise your watch according to your personal style without compromising functionality. Simply ensure that the strap is manufactured to quality standards and that the materials are suitable for your intended use (leather, rubber, fabric).

The longevity of a leather strap depends on the quality of the material, frequency of use and environmental conditions. On average, a high-quality leather strap—made with vegetable tanning or shell cordovan—lasts between 18 and 36 months with daily wear. Exposure to moisture, perspiration and UV rays accelerates ageing. To extend the life of your strap, we recommend alternating with other straps, applying protective treatments periodically, and storing your watch in dry environments.