Strap for Conquest 29.5 Quartz Ceramic

The lug width of the Longines Conquest L3.257.4.87.2 is 15mm, measured at the narrowest point of attachment to the case. This dimension is standard for this model with a 29.50mm case. Longines' manufacturing tolerance is ±0.2mm, so a standard 15mm strap fits perfectly.

The choice depends on personal use and style. For formal elegance, we recommend alligator in dark tones (black or chocolate brown) with silk stitching, which enhances the mother-of-pearl dial. Vegetable-tanned calf offers versatility and natural patina over time. For sporting contexts, NATO cotton or rubber straps provide practicality proportionate to the 29.50mm case.

Strap changes are performed via spring bars at the lug ends. Using a dedicated tool or thin knife, apply pressure to the spring bar to retract the internal spring, freeing the strap from the opposite side. Insert the new strap by retracting the spring bar into the lateral holes, ensuring it is securely fixed. A reversible operation with no risk to the case.

Yes, any 15mm strap is compatible with the Longines Conquest L3.257.4.87.2. Artisanal straps from Milano Straps, crafted to European horology standards, fit perfectly to the flat lugs of this model. We recommend straps in alligator, calf, NATO or rubber, selecting a thickness of 3.5-4mm for correct proportions.

Durability varies by material and use. A quality artisanal alligator strap, with vegetable tanning, lasts 8-12 years with regular wear, ageing naturally. Calf, being softer, reaches 6-10 years. Rubber maintains functionality for 4-6 years before elasticity diminishes. Milano Straps guarantees 18 months on all custom straps, with early replacement option if needed.