Technical Archive

Longines
Conquest L3.320.5.87.6— lug 15mm

Longines Conquest L3.320.5.87.6: 15mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Conquest 30 Stainless Steel - Pink Gold / MOP / Bracelet

Artisanal Note

"This model requires a precise 15mm lug width to preserve the original sartorial balance."

Lug Width

15 mm

The essential strap measurement.

Browse 15mm straps →

Reference

L3.320.5.87.6

Movement

Longines caliber L592.5 Hours, Minutes, Seconds | Date | Chronometer

The Heritage

The Conquest represents Longines' sport collection, equipped with the automatic caliber L592.5 with chronometer certification. The movement indicates hours, minutes, seconds and date. The case features 15mm lugs and reference L3.320.5.87.6.

FAQ

What is the exact lug width of the Longines Conquest L3.320.5.87.6?

The lug width of the Longines Conquest L3.320.5.87.6 is 15mm, corresponding to the distance between the lateral attachment pins of the case. This dimension is standard for women's models and is compatible with all straps manufactured for this lug width.

What is the best strap material for the Longines Conquest L3.320.5.87.6?

The best material depends on intended use. For formal occasions, we recommend alligator or vegetable-tanned shell cordovan, which enhance the rose gold case. For daily versatility, brushed vitello is ideal for comfort and patina development. Rubber or technical fabric straps are perfect for sport-casual contexts whilst maintaining the aesthetic balance of the model.

How do I change the strap on the Longines Conquest L3.320.5.87.6?

The process is straightforward: use a spring bar tool to compress the small metal pins on the sides of the case, remove the previous strap and insert the new one by aligning it with the attachment holes. There is no need to disassemble the case. The operation takes approximately two minutes and can be done at home with the correct tool.

Can I use an aftermarket compatible strap with the Longines Conquest L3.320.5.87.6?

Yes, any strap with a 15mm lug width is fully compatible with the Longines Conquest L3.320.5.87.6. Personalised artisanal straps of superior quality are recommended to achieve comfort, durability and aesthetics consistent with the Swiss timepiece.

How long does a leather strap last on the Longines Conquest L3.320.5.87.6?

Longevity depends on material and usage. Alligator or vegetable-tanned shell cordovan straps last 3-5 years with regular maintenance (gentle cleaning and semi-annual conditioning). Vitello straps have similar lifespan. Daily use without protection requires more frequent maintenance to preserve patina. Casati Milano offers 18-month warranty on bespoke straps.