Strap for Conquest 30 Stainless Steel / Silver / Bracelet

The lug width of the Longines Conquest L3.320.4.72.6 is precisely 15mm. This is a non-standard measurement requiring purpose-built straps for this attachment. To verify, measure the inner distance between the two spring bar pins without including collars: the result must be exactly 15mm.

An alligator strap with fine grain represents the most sophisticated choice, enhancing the satin-finished case elegantly. Italian calf leather with vegetable tanning offers versatility and develops natural patina over time. For a sportier character, a rubber or NATO strap in neutral tones echoes the Conquest's athletic heritage. Thickness should not exceed 3.5–4mm to preserve the proportions of the 30mm case.

The Longines Conquest L3.320.4.72.6 employs spring bars for strap attachment. Obtain a spring bar tool (pin removal lever), gently lift the pin from one side whilst securing the case, remove the old strap, insert the new one by aligning its holes with the attachment lugs, and snap the pin back into place. This operation requires approximately 2–3 minutes and no technical expertise.

Yes, the Longines Conquest L3.320.4.72.6 is fully compatible with certified aftermarket straps designed for 15mm lug width. Milano Straps offers an online selection of customisable 15mm straps in material, colour, wrist size and stitching thread. Atelier Casati Milano also creates bespoke straps for this reference with an 18-month warranty.

Leather strap durability depends on daily use, climate conditions and maintenance. A high-quality alligator or calf leather strap, with regular care (gentle cleaning, drying, avoiding prolonged moisture), has an average lifespan of 3–5 years. Rubber or NATO fabric straps last longer, up to 5–10 years, whilst gradually losing elasticity. Casati Milano's 18-month warranty covers manufacturing defects.