Strap for Conquest 38 Stainless Steel / Green / Bracelet

The lug width of the Longines Conquest L3.720.4.02.6 is 19 millimetres. This measurement is essential for selecting the correct strap: the strap must be 19 millimetres wide to fit perfectly into the case lugs without play or lateral protrusion. To verify the measurement, remove the original strap and measure the distance between the metal rings protruding from the case.

The best strap depends on use and personal preference. For formal elegance, we recommend cognac brown alligator or shell cordovan, which enhance the brushed steel case. For daily versatility, vegetable-tanned calf leather offers immediate comfort and natural ageing. For sporting contexts, a Cordura NATO or structured rubber maintains the watch's original functionality. All straps must have a 19-millimetre lug width.

Strap replacement is performed by removing the spring bars (also called lugs) that connect the strap to the case. Using a dedicated tool (spring bar tool) or a thin instrument, push the bar downward to free one end of the strap, then extract it completely. Repeat for the second bar. Insert the bars into the new strap, ensuring perfect alignment with the holes and ensuring they are parallel and fully inserted. The process requires care to avoid scratching the steel.

Yes, any strap with a 19-millimetre lug width is compatible with the L3.720.4.02.6, regardless of brand. Compatibility is determined by lug width, not by the watch manufacturer. We recommend quality straps with authentic leather finishes (alligator, calf, shell cordovan) or certified technical fabrics (NATO, Cordura). Always verify that the strap's total length is appropriate for your wrist, as measurements vary between manufacturers.

Durability depends on material and use. A quality alligator or calf strap with vegetable tanning lasts an average of 3–5 years with daily wear, ageing elegantly and developing a characteristic patina. Shell cordovan is more resistant, lasting 5–7 years due to the leather's density. Natural rubber remains functional for 2–3 years without significant aesthetic deterioration. A low-quality leather strap degrades within 12–18 months. To extend lifespan, avoid prolonged moisture exposure, apply leather balm every 6 months, and store in a cool, dry place.