Strap for Conquest 29.5 Quartz Ceramic

The lug width of the Longines Conquest L3.257.4.87.6 is precisely 15mm. This measurement corresponds to the distance between the spring bar holes on both lugs. Accurate measurement using a digital calliper is essential, as even minor tolerance variations can affect the strap's fit. This 15mm dimension is characteristic of ladies' models and compact-cased variants within the Conquest collection.

We recommend veined alligator in neutral tones—slate grey or ebony—or vegetable-tanned calf leather that develops a natural patina over time. The iridescent mother-of-pearl dial interacts beautifully with leathers that absorb light organically. The glossy black ceramic bezel pairs harmoniously with warm hues such as aged burgundy or dark brown. Avoid pure black-on-black combinations, as they create a flat, monolithic aesthetic.

Strap changes are accomplished via removable spring bars (perns) that attach the case to the lugs. Use a spring bar tool or thin, flat implement to compress the small pin and remove the previous strap. The procedure demands precision to prevent case scratches. Milano Straps artisanal straps feature standard lugs and insert smoothly: tolerance must be exact, with the strap entering under light resistance and without play. If difficulties arise, the Casati Milano atelier provides expert assistance by appointment.

Yes, provided the lug width measures exactly 15mm. Milano Straps' artisanal offerings are engineered specifically for this tolerance and maintain quality standards equivalent to Longines components. We recommend strap leather thicknesses between 1.4mm and 1.6mm for seamless transition from case to wrist. Bespoke straps from the Casati Milano atelier ensure maximum precision and fit.

Longevity depends on material and treatment. Vegetable-tanned calf, worn daily, retains structural integrity for 3–5 years before showing edge fatigue. Alligator, more resilient, may last 5–7 years. Determining factors include ambient humidity, cleaning frequency and sun exposure. Casati Milano's 18-month warranty covers manufacturing defects. To extend lifespan, rotate among multiple straps and apply occasional protective treatments with natural waxes.