Strap for Conquest Heritage 40 Stainless Steel / Black

The lug width of the Longines Conquest Heritage L1.650.4.52.2 is 20mm. This measurement represents the distance between the two lugs that connect the strap to the case. To verify it, use a digital calliper positioned inside the lug opening: the reading should be 20.0±0.2mm. This tight tolerance ensures precise compatibility with aftermarket straps, without slippage or oscillation.

The optimal strap choice depends on intended use. For formal settings, deep alligator leather offers institutional elegance and exceptional durability. Vegetable-tanned calf is versatile and develops authentic patina over time. For sport or aquatic use, FKM rubber or cordura NATO straps provide moisture resistance and practicality. A shell cordovan strap represents the premium option, with longevity and patina superior to any other leather.

Strap replacement requires a spring bar removal tool. Position the watch on a soft surface, locate the lugs on both sides of the case, use the tool to gently compress the internal spring bar and slide it outward. Repeat on the other side. Insert the bars into the new 20mm strap, align them with the case seats, and allow the bar to lock with an audible click. Verify that the strap does not slip before wearing the watch.

Yes, the Longines Conquest Heritage L1.650.4.52.2 is fully compatible with 20mm aftermarket straps. The 20mm lug width is an industry standard widely available in the artisanal and industrial strap market. Milano Straps offers a comprehensive collection of 20mm straps in various materials—alligator, calf, NATO, rubber—guaranteeing perfect compatibility and bespoke customisation. The construction tolerance of the lugs allows secure fitting without case modifications.

Leather strap longevity depends on material, tanning method, and usage patterns. Alligator, if properly maintained, lasts 5-7 years of daily wear. Vegetable-tanned calf lasts 4-6 years whilst developing authentic patina. Shell cordovan exceeds 10 years due to its denser molecular structure. To extend longevity, avoid prolonged exposure to moisture and fresh water, allow the strap to air-dry if wet, and rotate between multiple straps to permit the material to recover elasticity. Milano Straps offers 18 months warranty on all straps and maintenance support.