Strap for Conquest Quartz 25 Diamond

The lug width (ansa measurement) of the Longines Conquest L3.158.0.88.6 is 12 millimetres. This measurement refers to the internal distance between the two lugs of the case and determines strap compatibility. It is a relatively uncommon lug width in watchmaking, typically found on compact cases such as this 25-millimetre variant.

For the Longines Conquest L3.158.0.88.6, straps in dark brown alligator or vegetable-tanned leather are recommended, as they enhance the sporty-elegant character of the case. For summer use, vulcanised rubber or technical canvas straps maintain the sporting heritage. The choice depends on intended usage: for formal occasions, fine leather is preferable; for everyday versatility, vegetable-tanned calf leather offers the best balance.

To change the strap on the L3.158.0.88.6, you will need a spring bar tool. Place the watch on a stable surface, locate the small horizontal pins securing the strap to the lugs, and use the tool's fork to gently apply downward and lateral pressure to extract the pin. Repeat on both sides, then insert the pins into the new strap. It is advisable to have this operation performed by a professional to avoid damage to the case.

Yes, you may use high-quality aftermarket straps provided they meet the 12-millimetre lug width specification. Milano Straps offers a comprehensive range of artisanal straps compatible with this measurement, crafted from premium materials including alligator, vegetable-tanned calf leather, and vulcanised rubber. The key is to select specialised suppliers who guarantee millimetre-precision tolerances and finishing standards equivalent to the original case.

The lifespan of a leather strap depends on usage patterns, material quality, and care. A high-quality artisanal alligator or calf leather strap, used daily, typically lasts 3-5 years. Longevity is influenced by water exposure, perspiration, humidity, and frequency of wear. Regular cleaning and rotating between multiple straps significantly extends durability. Milano Straps provides straps with an 18-month warranty and offers repair and restoration services to prolong the life of your accessory.