Strap for Conquest Chronograph 42 Marco Odermatt

The lug width of the Longines Conquest L3.835.4.91.2 is 22mm. This measurement represents the distance between the two lugs of the watch case where the spring bars connect the strap. Always verify this dimension before purchasing an aftermarket strap to ensure perfect compatibility and correct aesthetics.

For this stainless steel and black ceramic chronograph, we recommend straps in black or dark brown alligator leather with vegetable tanning, or satin-finished calfskin. These materials create refined pairings with the case. For sports use, FKM rubber or robust NATO fabric straps offer practicality. Ensure the 22mm lug width is respected.

The process is straightforward: position the watch on a soft support. Locate the spring bar extraction holes on one side of the lugs. Using a spring bar tool (small instrument with a spatula), gently push the internal pin downward and outward until the internal spring is released. Repeat on the other side. Insert the new strap by reversing the process.

Yes, provided the strap is constructed for 22mm lug width. Many artisan strap makers offer custom versions of high quality that, from a constructive and finishing standpoint, match or exceed official Longines offerings. Always verify measurements and material (alligator, calf, rubber) according to your use and aesthetic preferences.

Durability depends on material and usage. Calfskin with vegetable tanning lasts approximately 3–5 years with regular wear; alligator and shell cordovan, being denser, may reach 7–10 years. Exposure to water, sweat, and UV rays accelerates ageing. Proper maintenance (frequent drying, avoiding prolonged immersion) significantly extends strap life.