Strap for Conquest 29.5 Automatic Double Row Diamond

The lug width of the Longines Conquest L3.180.0.87.6 is 15 mm. This unconventional dimension is specific to this 29.5 mm feminine model and is measured as the internal distance between the two attachment pins. It is essential to verify this measurement with a digital calliper before ordering a strap, as using standard widths (14 mm or 16 mm) would result in instability or installation impossibility.

The best strap choice depends on usage and aesthetic preferences. Alligator represents the luxury solution, developing elegant patina over time; vegetable-tanned calf leather offers softness and durability; a silk-cotton NATO strap provides contemporary versatility; vulcanised rubber ensures technical performance. All these materials are available in 15 mm lug width from Milano Straps, with customisation options and 18-month warranty from Casati Milano atelier.

Strap replacement is performed by removing the springbars, requiring a dedicated tool (spring bar tool). Position the tool on the small slot beneath the pin, apply pressure to release the internal spring, and extract the old strap. The new 15 mm strap is inserted while keeping the pins parallel until fully seated in both lugs. If inexperienced, we recommend the service at Casati Milano to avoid damage to the case.

Yes, quality artisanal aftermarket straps are fully compatible and often superior to original straps in terms of aesthetics and durability. Milano Straps offers an extensive selection of 15 mm straps crafted in alligator, vegetable-tanned calf, and other premium materials, customisable in sizing, colours, and details. Casati Milano atelier also creates bespoke straps with direct design consultation and material selection.

The lifespan of a leather strap varies by material type and usage. A quality artisanal alligator or calf strap typically lasts 3-5 years in daily wear, developing patina that enhances aesthetics. Critical factors are exposure to moisture, heat, and perspiration. Milano Straps provides straps with 18-month warranty from Casati Milano. We recommend rotating multiple straps and regularly cleaning the leather with a soft cloth to extend longevity.