Longines · Conquest Heritage

Strap for Conquest Heritage Chronograph Black Dial

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter39 mm
ReferenceL1.641.4.52.4 (aka: L16414524)
FamilyConquest Heritage
MovementLongines caliber L650 Hours, Minutes, Small Seconds | Date | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Conquest Heritage L1.641.4.52.4 (aka: L16414524)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Conquest Heritage L1.641.4.52.4 (aka: L16414524), seen from the bench

The Conquest Heritage represents the modern reinterpretation of a historic Longines model from the 1950s. It is equipped with the automatic caliber L650 with functions of hours, minutes, small seconds, date and chronograph. The case features a classic design with the crown and chronograph pushers positioned in the traditional configuration.

Frequently asked questions

What is the lug width of the Longines Conquest Heritage L1.641.4.52.4?

The lug width is 20 mm. This dimension, also called lug-to-lug width, is the distance between the two spring bar posts underneath the case. It is essential to measure this correctly to ensure the strap fits perfectly without play or forcing. A strap too narrow will create visible gaps; one too wide will not fit into the lug slots.

Which strap is most suitable for the Longines Conquest Heritage L1.641.4.52.4?

Dark brown or black alligator leather represents the most elegant choice, enhancing the watch's classical character. For daily and sports use, vegetable-tanned calf offers pleasant texture and natural ageing. Navy NATO fabric is ideal for casual settings. Natural rubber maintains vintage spirit whilst ensuring practicality in wet environments. Avoid synthetic materials: the Conquest deserves authentic leather.

How do you change the strap on a Longines Conquest Heritage?

Use a spring bar removal tool. Position the watch face-down, insert the tool's tip into the small lateral hole of the lug, gently push downward to release the spring bar post, and extract it. Repeat for the second post. Align the new strap's holes with the lug slots, then reinsert the spring bars until they click securely. Never force: if the bar does not click, check alignment.

Is an aftermarket strap compatible with the Longines Conquest Heritage L1.641.4.52.4?

Yes, provided it is 20 mm lug width and of high construction quality. Artisanal straps in alligator, calf, shell cordovan, or NATO from specialised manufacturers guarantee perfect compatibility and longevity. Always verify the lug width specification before purchase. Custom high-quality straps can significantly elevate daily wearing experience.

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

A quality leather strap, with vegetable tanning or natural alligator, typically lasts 3–5 years of daily wear, depending on care and climate. Perspiration, humidity, and solar exposure accelerate wear. A vegetable-tanned strap develops noble patina over time, an indicator of natural ageing. Clean periodically with a dry cloth, avoid prolonged water immersion, and apply leather balm every 6–12 months to extend longevity and maintain suppleness.

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