Strap for Conquest 41 Automatic Ceramic

The lug width of the Longines Conquest L3.657.4.56.2 is 21 millimetres. This measurement is specific to this model and requires straps constructed with precise tolerances, excluding generic or standard aftermarket solutions. The spring bars must fit perfectly without lateral play to ensure correct aesthetic transition between case and wrist.

For the Conquest L3.657.4.56.2, straps in black or dark blue alligator are recommended for formal elegance, or vegetable-tanned calf for artisanal authenticity with evolving patina over time. For tactical use, structured rubber or NATO fabric maintain functional coherence. In any case, the buckle should be a deployante in steel with double-locking closure for wrist reliability.

Strap replacement requires a specialised tool: a spring bar remover or dedicated pin extraction tool. Gently remove the spring bars from the case lugs, taking care not to scratch the steel and ceramic. Once extracted, insert the spring bars into the holes of the new 21mm strap, ensuring they fit perfectly without play. If uncertain, consult a specialist watchmaker or Casati Milano's service.

Yes, the Conquest L3.657.4.56.2 is compatible with quality aftermarket straps constructed for 21mm lug width. However, not all 21mm straps are equal: construction tolerances, thickness, leather rigidity and pin quality vary significantly. We recommend specialised artisanal straps that guarantee precise fit and finishing coherent with the steel and ceramic case.

The lifespan of a leather strap depends on material and usage. A quality artisanal alligator or calf strap lasts 3-5 years with regular wear (5-7 days weekly), assuming moderate exposure to perspiration, moisture and UV rays. With proper maintenance (drying after water contact, nourishing cream 2-3 times yearly), lifespan extends. Rubber or NATO straps offer greater environmental resistance, with lifecycle of 5-7 years before structural wear.