Longines
Conquest L3.830.4.92.9— lug 21mm

The Longines Conquest L3.830.4.92.9 features 21 mm lug width. This dimension is standard across the Conquest family and is essential for ensuring compatibility with aftermarket straps. You can verify it by measuring the distance between the lug attachments using a digital calliper.

The ideal strap depends on intended use. For formal contexts, we recommend Alligator Mississippiensis with contrasting finished details, or vegetable-tanned calf leather that develops natural patina over time. For sports use, vulcanised rubber straps with grain texture ensure water resistance without compromising elegance. Avoid synthetic leather, which does not breathe and lacks authentic ageing characteristics.

To change the strap, you must remove the spring bars from the lugs. Use a dedicated tool or blunt tip to gently press the tension hook, then extract the bar. Ensure the new strap has matching dimensions (21 mm) and insert the spring bars into the attachments with controlled movement. Avoid excessive force, which may damage the holes.

Yes, any strap with 21 mm lug width is compatible. However, to ensure no excessive play, precise verification of the width is essential. Artisanal natural leather straps (alligator, calf, cordovan) represent the highest quality level and allow customisation in colour, thickness, and thread colour.

A high-quality leather strap (alligator or vegetable-tanned calf) typically lasts 2-4 years with daily use, developing natural patina. Durability depends on frequency of use, moisture exposure, and maintenance. Vulcanised rubber straps exceed 5 years of service life. We recommend monthly protective treatments and, if necessary, refurbishment by a specialist artisan.