Technical Archive

Longines
Conquest L3.377.3.87.7— lug 17mm

Longines Conquest L3.377.3.87.7: 17mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Conquest Quartz 34 Stainless Steel - Yellow Gold / MOP

Artisanal Note

"This model requires a precise 17mm lug width to preserve the original sartorial balance."

Lug Width

17 mm

The essential strap measurement.

Browse 17mm straps →

Reference

L3.377.3.87.7

Movement

Longines caliber L156 Hours, Minutes, Seconds | Date

The Heritage

The Conquest represents Longines' sports line with functions of hours, minutes, seconds and date. It features the Longines L156 caliber with date indication. The case has 17mm lugs for the strap.

FAQ

What is the exact lug width of the Longines Conquest L3.377.3.87.7?

The lug width of the Longines Conquest L3.377.3.87.7 is precisely 17mm, a non-standard measurement that reflects Longines' design philosophy for a 34mm case diameter. This specification is critical when selecting a compatible strap without compromise.

Which strap material is recommended for the Conquest L3.377.3.87.7?

For the Conquest L3.377.3.87.7, the recommended materials are alligator (for maximum refinement and aesthetic evolution), vegetable-tanned calf (versatile and sustainable), NATO (to enhance the sporting heritage), and vulcanised rubber (for durability and everyday practicality). Your choice depends on intended use and personal preferences regarding comfort and style.

How do you change the strap on a Longines Conquest L3.377.3.87.7?

The Conquest L3.377.3.87.7 strap is changed using specialist watchmaking tools: a spring bar removal tool or fine-tip screwdriver. It is advisable to consult an experienced watchmaker or the Casati Milano service to prevent case damage. The procedure requires technical precision and delicate handling.

Is there a compatible aftermarket strap for the Longines Conquest L3.377.3.87.7?

Yes, the 17mm lug width accommodates quality aftermarket straps built to artisanal specifications. Milano Straps offers a curated collection of 17mm straps customisable in leather, alligator and NATO, all compatible with the Conquest and available with rapid delivery. Casati Milano also creates bespoke straps with personalised leather selection.

What is the average lifespan of a leather strap for the Conquest L3.377.3.87.7?

A quality leather strap for the Conquest L3.377.3.87.7 typically lasts 3–5 years with daily wear, depending on usage frequency, climate conditions and care routine. Vegetable-tanned leather generally outlasts alligator slightly. Casati Milano provides an 18-month warranty on bespoke straps, with maintenance and replacement options available.