Longines · Heritage

Strap for BelleArti 24.6 Stainless Steel Diamond

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

Lug width15 mm
Case diameter25 mm
ReferenceL2.501.0.83.3 (aka: L25010833)
FamilyHeritage
MovementLongines caliber L176 Hours, Minutes, Small Seconds
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Heritage L2.501.0.83.3 (aka: L25010833), seen from the bench

The Longines Heritage reference L2.501.0.83.3 features the L176 caliber with hour, minute and small seconds functions. The model features 15mm lugs that evoke the aesthetic of the brand's vintage watches. The dial configuration with separate small seconds follows the stylistic canons of the Longines Heritage collection.

Frequently asked questions

What is the lug width of the Longines Heritage L2.501.0.83.3?

The lug width of the Longines Heritage L2.501.0.83.3 is 15mm. This measurement, taken between the inner shoulders of the lugs, is essential for selecting compatible straps. On a 24.60mm case diameter, 15mm maintains elegant proportions and ensures the strap sits flush without tolerance issues.

What is the best strap for the Longines Heritage L2.501.0.83.3?

There is no single answer, but three excellences: alligator for immediate luxury and refined grain; vegetable-tanned calf for colour evolution over time; shell cordovan for absolute durability and tactile depth. Each material expresses itself differently against the Heritage's compact proportions.

How do I change the strap on the Longines Heritage L2.501.0.83.3?

The strap is removed by inserting a spring bar tool from inside the case, gently pushing the spring retention pin. This frees the strap from the lugs. Fitting a new strap reverses this process: the spring pin must click into the designated holes on the case sides.

Can I use an aftermarket strap on this Longines?

Yes, provided the lug width is exactly 15mm. Artisan straps of quality construction, with appropriate thickness (3.5–4.2mm) and robust stitching, guarantee superior structural and aesthetic compatibility to many OEM alternatives. Verify that the strap has a well-formed lug without sharp edges.

How long does a leather strap last on a Longines Heritage L2.501.0.83.3?

Durability depends on material and usage. Vegetable-tanned calf lasts 2–4 years with daily wear. Alligator and shell cordovan extend to 4–6 years. Patina improves over time. Rotating multiple straps and protecting from excessive moisture and sweat extends lifespan. Quality straps can be restored or re-lined.

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