Strap for Conquest 29.5 Automatic Stainless Steel Black

The lug width of the Longines Conquest L3.276.4.58.6 is 15mm. This dimension is measured by calculating the distance between the longitudinal suspension pins. The measurement must exclude the crown and caseback, considering only the space between the lugs.

For the L3.276.4.58.6, we recommend alligator in medium brown or cognac for maximum refinement, vegetable-tanned calf leather for patina development over time, or rubber/silicone for sporty use. NATO fabrics provide versatility in humid environments, preferably in navy, grey or natural beige tones.

Use a digital calliper and position it horizontally across the case, measuring the distance between the centres of the suspension pins. The result must be exactly 15mm. Do not include the screw-down crown or other appendages in your measurement.

Yes, milanostraps.it offers ready-to-ship straps for 15mm lugs, customisable in materials, sizes and stitching. For a fully bespoke solution, the Casati Milano atelier creates made-to-measure straps with direct leather selection and an 18-month warranty.

A quality leather strap (alligator or vegetable-tanned calf) guarantees 3–5 years of daily wear with standard maintenance. Atmospheric agents, prolonged sun exposure, and contact with freshwater or saltwater accelerate ageing. Replacement is recommended when the strap shows visible cracks or structural deterioration of the keepers.