Longines
Conquest L3.430.4.99.9— lug 17mm
Longines Conquest L3.430.4.99.9: 17mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 17mm lug width to preserve the original sartorial balance."
Technical Specifications
Longines L3.430.4.99.9The essential strap measurement.
Browse 17mm straps →L3.430.4.99.9
Longines caliber L888.5 Hours, Minutes, Seconds | Date | Chronometer
The Heritage
FAQ
What is the lug width of the Longines Conquest L3.430.4.99.9?
The lug width of the Longines Conquest L3.430.4.99.9 is 17 millimetres. This measurement is essential for strap compatibility: it must match precisely the width of the fitting zone at the watch's lugs. To verify it, use a calliper on the area where the strap connects laterally.
Which strap is most suitable for the Longines Conquest L3.430.4.99.9?
The most appropriate strap depends on your intended usage. Alligator represents the elegant choice for formal occasions, thanks to its natural and fine grain. Calf leather offers versatility and develops a rich patina over time, ideal for daily wear. For humid or sports environments, calf leather with vegetable tanning or a modern rubber strap ensures superior durability whilst maintaining the watch's refined aesthetics.
How do I change the strap on a Longines Conquest L3.430.4.99.9?
Strap replacement is accomplished by removing the spring bars (pins) that connect the strap to the watch's lugs. Use a dedicated spring bar tool, positioning the tip under the lug, then press gently until the pin clicks out. Remove the old strap and align the new one's holes with the lugs, then reinsert the pins until they click. If you lack confidence, consult a professional watchmaker.
Can I wear an aftermarket strap on a Longines Conquest L3.430.4.99.9?
Yes, absolutely. Any strap with a 17-millimetre lug width is compatible with the Conquest. High-quality aftermarket straps—made from certified alligator, tannic calf or purpose-designed rubber—offer personalisation freedom beyond original factory options. Online you will find a broad range of 17mm straps ready for dispatch, or you may commission bespoke straps from specialised ateliers such as Casati Milano, with choice of leather, colours and personalised details.
How long does a leather strap last on a watch like the Longines Conquest L3.430.4.99.9?
Leather strap longevity depends on leather quality, frequency of wear and environmental conditions. An excellent-quality alligator strap, worn regularly but not daily, may last 5–8 years before showing wear. Good-quality calf leather typically lasts 3–5 years in daily use. Vegetable-tanned straps age gracefully and develop an appreciated patina. A rubber strap has superior durability (7–10 years) but requires periodic cleaning. Maintenance—avoiding excessive perspiration and prolonged moisture—significantly extends strap life.