Strap for Conquest Quartz 34 Stainless Steel - Diamond / Black

The Longines Conquest L3.400.0.57.6 features a lug width of 20mm. This measurement represents the distance between the two lateral lugs (spring bar attachments) on which the strap is mounted. It is essential to verify that the chosen strap is compatible with this exact dimension to ensure stable anchorage without play.

The choice depends on usage and personal preference. For formal elegance, we recommend vegetable-tanned alligator in cognac brown or black shell cordovan. For daily versatility, a compact grey-taupe calf or navy NATO provides practicality while maintaining aesthetic coherence. The 34mm case diameter favours proportionate straps, neither bulky nor insufficient.

This model features screw-down lugs. To change the strap, use a spring bar tool to gently extract the elastic pins from the lugs. No permanent tools or crown disassembly are required. Once the old strap is removed, align the new strap holes with the pins and press until the attachment clicks into place.

Yes, any strap with a 20mm lug width is compatible with this model. Artisanal leather straps offer an aesthetic and tactile upgrade over factory versions, whilst allowing customisation in length, initials and stitching thread colour. The key is selecting reputable suppliers who guarantee construction quality and longevity.

A quality leather strap, featuring vegetable tanning and artisanal construction, typically lasts 3–5 years with daily wear. Durability depends on exposure to moisture, perspiration and mechanical stress. Leathers such as shell cordovan age beautifully and develop aesthetic patina. Regular maintenance (periodic cleaning, drying, protection from heat sources) substantially extends strap lifespan.