Strap for HydroConquest 32 Quartz Stainless Steel / MOP / Bracelet

The lug width of the Longines HydroConquest L3.370.4.87.6 is 16mm. This measurement is taken internally, from shoulder to shoulder of the spring bar, excluding the lateral lugs. A compatible strap must have exactly 16mm width to fit without forcing or adapters.

For the L3.370.4.87.6 we recommend an authentic alligator strap with vegetable tanning (pearl grey or navy blue for chromatic harmony), or white calf leather for a sophisticated tonal match. If the watch will be frequently worn in water, a black sponge rubber strap maintains full 300m water resistance. Milano Straps offers ready-to-ship 16mm straps online and custom personalisation at Casati Milano atelier.

Strap replacement on the L3.370.4.87.6 is performed by removing the old strap from the two lateral lugs. Use a thin screwdriver or professional spring bar tool to compress the small spring mechanism on one end, then extract the metal bar (spring bar). Repeat on the opposite lug. To install the new strap, reinsert the spring bar compressing the spring, then seat the strap on the second lug. If unsure, have the operation performed by a certified watchmaker.

Yes, any strap with 16mm lug width is compatible with the L3.370.4.87.6, provided construction quality and finishing are consistent with the watch's standard. Milano Straps sells exclusively Italian-made artisanal 16mm straps crafted in premium leather with refined finishes, ensuring total compatibility and structural longevity.

Leather strap durability depends on daily wear and care. An authentic alligator strap with vegetable tanning, worn daily, maintains structural integrity for 3-5 years, with patina and wear marks increasing character. A box calf strap lasts 2-4 years before replacement. Leather naturally develops creasing and patina; this is not a defect but aesthetic evolution. Milano Straps provides 18-month warranty on all artisanal straps.