Strap for Conquest Quartz 36 Stainless Steel / White

The lug width of the Longines Conquest L3.378.4.16.6 is 17 millimetres. It is measured from the outer edge of the left lug to the outer edge of the right lug. This measurement is rare and specific to this model, making accurate strap selection essential.

The best strap depends on your use case and personal preferences. For formal and elegant contexts, we recommend alligator with fine grain or calf leather in vegetable tanning. For daily sports wear, a calf strap with stainless steel deployant offers extended comfort. In summer, a NATO or premium rubber strap maintains the compact profile. Milano Straps offers all these solutions in 17mm size.

The Conquest L3.378.4.16.6 features fixed lugs. To change the strap, you need to remove the spring bars using a dedicated spring bar tool. Position the tool under the bar, push towards the centre to release it from its seat, and insert the new strap into the lugs. We recommend having this operation performed by an expert if you are inexperienced, such as the technicians at Casati Milano.

Yes, quality aftermarket straps are fully compatible with the Conquest L3.378.4.16.6, provided they have the correct 17mm lug width. The artisanal straps from Milano Straps, crafted in alligator, calf leather and other premium materials, offer superior quality to many original solutions and allow customisation (length, initials, stitching colour).

The lifespan of a leather strap depends on usage, care and material quality. A premium alligator or calf strap in vegetable tanning typically lasts 2–5 years with moderate daily wear. Straps from Casati Milano with an 18-month warranty are crafted with selected hides and artisanal finishing, ensuring extended durability. The natural patina that develops over time is a stylistic merit, not a defect.