Strap for Conquest V.H.P. Chronograph 42 Stainless Steel / Carbon / Rubber

The lug width of the Longines Conquest V.H.P. L3.717.4.66.9 is 20mm. This measurement represents the internal distance between the two lugs on the case and determines compatibility with aftermarket straps. To verify accurately, measure the space from shoulder to shoulder between the lugs or consult the official Longines technical documentation.

The ideal strap depends on intended use and aesthetic preference. For an elegant profile, alligator leather in dark shades (black, brown, navy blue) enhances the watch's sophisticated sportiness. For a casual-resistant look, rubber or synthetic straps provide water resistance. Vegetable-tanned calf leather develops a beautiful patina over time. NATO straps in neutral canvas combine sporting authenticity with versatility.

To change the strap, you will need a spring bar removal tool. Position the watch with the lug facing upward, insert the tool into the small lateral slot of the lug to compress the internal spring, and gently slide out the old strap. Repeat on the other side. Insert the new strap by aligning the holes with the lugs and ensure the spring bars lock securely into position.

Yes, provided the strap has a 20mm lug width. High-quality aftermarket artisanal straps (such as those from Milano Straps) are fully compatible with the L3.717.4.66.9, offering customisation in material, colour, and buckle configuration (standard or deployante) while maintaining full mechanical compatibility with the original lugs.

The lifespan of a high-quality artisanal leather strap varies from 3 to 7 years depending on usage, tanning method, and care. A vegetable-tanned calf strap tends to last longer whilst developing a desirable patina. Prolonged exposure to moisture, perspiration, and UV rays shortens service life. Periodic maintenance (cleaning, conditioning) significantly extends strap longevity.