Strap for Conquest Quartz 41mm Silver Leather

The lug width of the Longines Conquest L3.659.4.76.5 is 21 millimetres. This measurement is specific to this model and does not conform to the most common standards (18, 20, 22mm). To verify it, place a ruler perpendicular to the case lugs: the distance between the two inner pins must be exactly 21mm. This is a critical measurement when selecting the correct strap without risk of improper fit.

The Conquest L3.659.4.76.5 performs optimally with straps in natural alligator, calf grain, or shell cordovan crafted with vegetable tanning. Alligator emphasises the sports character with its regular grain; calf grain creates an aesthetic conversation with the satin-finished steel case; shell cordovan adds aesthetic depth and a patina that evolves over time. For a sport-chic approach, NATO in Cordura canvas or FKM rubber remain excellent functional alternatives.

Strap replacement requires a spring bar tool (specialised lever). Insert the small end of the lever into the slot beneath the lug, pressing gently downwards to retract the pin. Remove the old strap. Repeat on the other side. For the new strap, align the pins with the lugs and press until you hear a distinct click. If you lack confidence, have the operation performed by a watchmaker: the risk of scratching the case should not be underestimated.

Yes, provided the strap is constructed with a 21-millimetre lug width and pins of the correct length. Artisanal straps from milanostraps.it are compatible and crafted from superior leather quality compared to official Longines OEM straps. We recommend verifying compatibility with the retailer before purchase.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 3-5 years with daily wear, 5-7 years if worn occasionally. Longevity depends on exposure to perspiration, moisture, direct sunlight and the regularity of maintenance (periodic cleaning, hydration with specific balms). Casati Milano straps include an 18-month warranty against manufacturing defects and can be refurbished through the atelier.