Longines · Conquest

Strap for Conquest Quartz 25 Ceramic

Takes 12 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width12 mm
Case diameter25 mm
ReferenceL3.157.4.57.2 (aka: L31574572)
FamilyConquest
MovementLongines caliber L250 hours, minutes, seconds | date
CaseCeramic, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Conquest L3.157.4.57.2 (aka: L31574572), seen from the bench

The Longines Conquest L3.157.4.57.2 is a 25mm women's sports watch featuring a high-tech ceramic and stainless steel case with a rotating ceramic bezel. It houses the Longines L250 quartz movement, accurate to ±15 seconds per month, and includes a sapphire crystal and date window at 3 o'clock. The 12mm lug width ensures precise compatibility with aftermarket straps while maintaining balanced proportions on feminine wrists.

Frequently asked questions

What is the lug width of the Longines Conquest L3.157.4.57.2?

The lug width of the Longines Conquest L3.157.4.57.2 is 12mm. This measurement is taken between the inner edges of the lugs and is crucial for compatibility with aftermarket straps. Any strap with a 12mm lug width will fit this model perfectly.

What is the best strap for the Longines Conquest L3.157.4.57.2?

The ideal strap depends on usage and personal preference. For formal occasions, vegetable-tanned alligator leather offers an elegant texture and develops a rich patina over time. Shell cordovan is the premium choice for exceptional durability and aesthetic appeal. Box calf is versatile and practical for daily wear. For sporting applications, NATO or rubber straps provide comfort and resilience.

How do you change the strap on the Longines Conquest L3.157.4.57.2?

Strap replacement is performed by removing the spring bars connecting the lugs to the case. Using a dedicated spring bar tool, gently push the pin inward to release the old strap, then align the new strap's lug with the hole and release the pin until it locks. Handle with care to prevent scratches on the case.

Are aftermarket straps compatible with the Longines Conquest L3.157.4.57.2?

Yes, all straps with a 12mm lug width are compatible with the Conquest L3.157.4.57.2. Milano Straps artisanal straps are manufactured to the precise specifications of this model and guarantee perfect fit without excessive play or forcing.

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

The lifespan of a leather strap depends on the material and usage patterns. Premium alligator or shell cordovan, with regular maintenance, can last 10-15 years. Box calf, being thinner, typically lasts 5-8 years. Milano Straps products include an 18-month warranty and are crafted from premium leathers selected for longevity and enduring beauty.

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