Strap for Conquest Quartz 36 Stainless Steel / Black

The lug width of the Longines Conquest L3.378.4.57.6 is 17 millimetres. This measurement represents the distance between the two metal pins that hold the strap beneath the case. It is essential to verify this dimension before purchasing a replacement strap to ensure perfect compatibility and trouble-free installation.

For the Conquest L3.378.4.57.6 we recommend an alligator strap for formal occasions, vegetable-tanned calf leather to develop a rich patina over time, or shell cordovan for versatility and water resistance. The choice depends on intended use: alligator for understated elegance, calf for natural ageing, cordovan for practicality and durability.

Changing the strap requires a specialized tool called a spring bar tool. Position the watch with the strap facing downward, insert the spring bar tool into the lateral gaps to compress the pins, then gently extract the strap. Repeat the operation on the other side. Install the new strap by reversing the procedure. If uncertain, consult a professional to avoid damaging the case.

Yes, any strap with a 17mm lug width is compatible with the Conquest L3.378.4.57.6. Quality aftermarket straps, such as those produced by specialized ateliers, often surpass the original strap in craftsmanship and materials. Always verify that the lug width is precisely 17mm before purchase.

The lifespan of a leather strap depends on material quality, daily use and climatic conditions. A high-quality alligator or cordovan strap can last 5-7 years with ordinary care. A vegetable-tanned calf strap typically lasts 3-5 years. Exposure to water, sunlight and humidity accelerates wear; protecting the strap from frequent bathing and storing it in a dry place extends its useful life.