Strap for Conquest 30 Stainless Steel / Blue - Diamond / Bracelet

The Longines Conquest L3.320.4.97.6 features a lug width of 15mm. This is a specific, reduced measurement compared to the standard 16mm or 18mm widths, purposefully designed to maintain harmonious proportions on the 30mm case. Measurement is taken internally between the spring bar lugs, edge to edge.

Alligator is the historically appropriate choice: its fine grain creates texture that enhances the case without competing visually. Vegetable-tanned calf is ideal for those seeking a patina that evolves over time, while shell cordovan delivers durability and a finish reminiscent of vintage leather. For a sportier approach, canvas NATO or Rallye rubber transform the character whilst respecting its heritage.

The strap is replaced via the spring bars: gently remove the old lug using a spring bar tool (small pointed instrument), press the small button on the attachment to release the pin, extract the pin itself. Repeat on the opposite side. Insert the new strap by positioning the pin in its housing and press until you hear a subtle click. The operation takes approximately 30 seconds per side.

Yes, absolutely. Any strap in leather, rubber or fabric with a 15mm lug width will be compatible. Artisanal straps from Milano Straps guarantee excellent fit tolerance and utilise premium leathers (alligator, vegetable-dyed calf, shell cordovan) that dialogue elegantly with the steel case and refined proportions of the watch.

A quality alligator or vegetable-tanned calf strap typically lasts 3-5 years with daily wear, varying according to climate (humidity), cleaning frequency and individual perspiration patterns. Shell cordovan, due to its denser fibre structure, can reach 7-10 years. Typical wear includes grain softening, non-uniform colour variation and fibre yielding at the buckle zone. Regular maintenance (damp cloth cleaning, natural balm application every six months) significantly extends lifespan.