Strap for Conquest Quartz 36 Stainless Steel / Silver

The lug width of the Longines Conquest L3.378.4.76.6 is 17.00 millimetres. This measurement determines compatibility with any aftermarket strap: a strap must feature exactly this width to fit into the watch's lugs without play or stress. You can verify the measurement using a digital calliper positioned perpendicularly to the watch's plane, placing the calliper's contact points on the inner surfaces of the lugs.

The best material depends on intended use. For formal elegance and longevity, alligator with vegetable tanning is a coherent choice: regular grain doesn't compete with the case's simplicity at 36mm, and vegetable tanning develops natural patina over time. For everyday versatility, cognac or tabacco brown calf leather or cotton-linen textiles maintain correct proportions. Shell cordovan represents a premium alternative for those who appreciate natural constructive imperfection and emotional charge that grows with age.

The strap is changed using a simple tool: a removal tool (small forked screwdriver or spring bar extractor). Insert the screwdriver at the base of the lug, where the strap meets the case, and push the elastic pin gently outward until the strap releases. Reverse the procedure to mount the new strap. This operation takes two minutes, requires no technical skill, and poses no risk to the case.

Yes. Any strap with a 17.00 millimetre lug width is mechanically compatible. Brands such as Casati Milano, Christopher Ward, or manufacturers of alligator and calf leather specialising in artisanal straps offer options that often exceed the original Longines strap in constructive quality. Compatibility is guaranteed: the technical specification is standard, the sole parameter is lug width.

Leather strap longevity depends on frequency of use, exposure to moisture, and material quality. A quality artisanal alligator or calf leather with vegetable tanning maintains functionality for 3–5 years with daily wear, longer if used occasionally. Leather stretches slightly over time: if the strap becomes loose, a craftsman can shorten it or adjust the deployante within minutes. Shell cordovan, if properly cared for, lasts 7–10 years owing to superior density. Minimal maintenance—gentle drying after rain, avoiding prolonged immersion—significantly extends longevity.