Strap for Conquest Chronograph Quartz 41 Stainless Steel / Black / Strap

The lug width of the Longines Conquest L3.700.4.56.3 is 21mm. This measurement corresponds to the internal distance between the lug attachment points on the case. It is essential to verify this dimension directly on the watch using a calliper before ordering a strap, as mechanical compatibility depends entirely on this specification.

The optimal strap choice depends on intended use and aesthetic preference. For formal elegance, dark brown alligator or vegetable-tanned calf leather represent authentic selections. For sports applications, a cotton-nylon NATO or vulcanised rubber strap is appropriate. On a 41mm squared, contemporary case, we recommend avoiding excessively soft leathers (suede) and prioritising textured materials that dialogue with the steel geometry.

The Conquest features integrated lugs (non-removable). To change the strap, you must extract the spring bars that connect the strap to the lugs: using a spring bar tool, insert the tip into the small opening beneath the lug, compress the internal spring and slide the bar outward. Repeat on the opposite side. Then remove the old strap and insert the new strap's spring bars through the holes. This procedure requires care to avoid scratching the steel case.

Yes, any strap equipped with 21mm spring bars is mechanically compatible with the Conquest L3.700.4.56.3. However, we recommend verifying that the strap thickness does not exceed 4–5mm at the lug area, to prevent friction with the case. Quality artisanal straps guarantee this compatibility whilst adding personal aesthetic value.

A quality leather strap, worn daily, typically lasts 2–4 years before requiring replacement. Longevity varies according to material (vegetable-tanned alligator outlasts standard European calf), frequency of wear and exposure to perspiration, moisture and UV radiation. A vulcanised rubber strap offers greater durability (5+ years) because it resists water and corrosive agents more effectively.