Strap for Conquest Classic Automatic 40 Stainless Steel / Red Gold / Silver

The lug width of the Longines Conquest Classic L2.785.5.76.7 is 18 millimetres. This measurement represents the distance between the two spring bars that attach the strap to the case. It is essential to verify this dimension with precision before purchasing an aftermarket strap, as an incorrectly sized lug width can result in dangerous play or make fitting impossible.

The best strap depends on intended use and personal preference. An alligator leather with vegetable tanning in deep black or cognac creates an elegant and characterful pairing. A brushed calf in beige orients the timepiece towards formal wear. A rubber strap of high construction quality suits marine environments and recreational activities. A NATO fabric strap in hi-tex offers versatility for those who change the watch's appearance frequently. Your choice should consider the combination of materials (rose gold and stainless steel) on the case.

To change the strap, position the watch with the case face upward. Locate the spring bars (the small metal pins) that attach the strap to the sides of the case. Using a dedicated tool, such as a spring bar removal tool, apply gentle pressure from below upward to release the internal spring. Once the first bar is free, remove the old strap. Repeat the procedure on the opposite side. Align the new strap's pins with the case lugs and press gently until they click into place. This procedure requires care to avoid scratching the case.

Yes, the Longines Conquest Classic L2.785.5.76.7 is fully compatible with high-quality aftermarket straps, provided the lug width is exactly 18 millimetres. Artisanal straps in leather (alligator, calf, shell cordovan), rubber, NATO fabric and other materials are compatible. Choosing an aftermarket strap allows you to personalise the timepiece according to context, colour and texture, whilst maintaining full compatibility with the original Longines movement and case.

The lifespan of a leather strap depends on the tanning method, frequency of use and environmental conditions. A strap in alligator or vegetable-tanned calf of artisanal quality typically lasts 3–5 years of daily wear, developing a characteristic patina that increases its aesthetic value over time. Prolonged exposure to moisture, perspiration and UV rays accelerates wear. Regular maintenance (cleaning, conditioning with specialist creams) significantly extends lifespan. Rubber and modern silicone straps resist degradation for 5–7 years before showing signs of wear, retaining their elastic properties.