Longines · Conquest

Strap for Conquest 29.5 Quartz Moonphase Stainless Steel / Blue / Bracelet

Takes 15 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width15 mm
Case diameter30 mm
ReferenceL3.380.4.97.6 (aka: L33804976)
FamilyConquest
MovementLongines caliber L296.2 hours, minutes, seconds | date | moonphase
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Conquest L3.380.4.97.6 (aka: L33804976), seen from the bench

The Conquest is powered by the Longines L296.2 caliber with functions of hours, minutes, seconds, date and moon phases. The reference L3.380.4.97.6 features 15mm lug width. The movement provides moon phase indication in addition to the standard time and calendar functions.

Frequently asked questions

What is the lug width of the Longines Conquest L3.380.4.97.6?

The lug width of the Longines Conquest L3.380.4.97.6 is 15mm, the standard spacing between the case lugs. This dimension is specific to female-oriented models and ensures balanced proportions on medium-width wrists.

What is the best strap for the Longines Conquest L3.380.4.97.6?

Alligator leather with vegetable tanning is the ideal choice for this Conquest: the natural grain pattern complements the satin-finished steel case perfectly. Box calf is a reliable alternative for daily wear with superior durability. For sporty use, a heavy-duty fabric NATO provides superior grip and water resistance.

How do you change the strap on the Longines Conquest L3.380.4.97.6?

Strap replacement is performed using spring bars located on the case lugs. Using a dedicated removal tool or a blunt-tipped implement, gently compress the spring to release the bar from one end, slide out the old strap, and insert the new one by aligning the holes with the lug ends. Ensure the spring returns to its correct position.

Which aftermarket straps are compatible with the Longines Conquest L3.380.4.97.6?

Any strap with a 15mm lug width is compatible with the Conquest L3.380.4.97.6, regardless of brand. Milano Straps provides a comprehensive selection of 15mm straps in alligator, calf, NATO, and rubber, customisable upon request. Compatibility is guaranteed by standardised watch measurements.

How long does a leather strap last on the Longines Conquest L3.380.4.97.6?

A quality leather strap (alligator, calf) typically lasts 3-5 years with daily wear, depending on exposure to moisture, heat, and mechanical stress. Vegetable-tanned leather develops a natural patina; periodic maintenance (cleaning, UV protection) significantly extends lifespan. Casati Milano offers 18 months warranty on bespoke-crafted straps.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only