Longines · Heritage

Strap for Heritage 1954 Black

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

Lug width20 mm
Case diameter40 mm
ReferenceL2.747.4.52.4 (aka: L27474524)
FamilyHeritage
MovementLongines caliber L674 Hours, Minutes, Small Seconds | Date, Day | 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 Heritage L2.747.4.52.4 (aka: L27474524)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Heritage L2.747.4.52.4 (aka: L27474524), seen from the bench

The Longines Heritage L2.747.4.52.4 is a 40mm stainless steel chronograph inspired by military watches from the 1950s. It features the L674 manual-wind caliber with integrated chronograph function, offering 42 hours of power reserve. The 20mm lug width accommodates standard aftermarket straps and maintains visual balance on the wrist.

Frequently asked questions

What is the lug width of the Longines Heritage L2.747.4.52.4?

The lug width of the Longines Heritage L2.747.4.52.4 is 20mm. This measurement is essential when selecting compatible straps: the spring bar pins of the case are exactly 20mm apart. Any strap with a 20mm lug width pairs flawlessly with this model, ensuring a precise fit without lateral play.

Which strap do you recommend for the Longines Heritage L2.747.4.52.4?

For the Longines Heritage L2.747.4.52.4, we recommend vegetable-tanned alligator, shell cordovan, or pebbled calf. Alligator maintains the vintage character of the stainless steel case; shell cordovan develops natural patina over time, telling the story of every wear; pebbled calf offers practical durability with minimal maintenance. Avoid smooth crocodile (too formal) and rubber (only for genuinely tactical use).

How do you change the strap on the Longines Heritage L2.747.4.52.4?

To change the strap, you need a dedicated spring bar tool. Insert the tool's tip into the small hole near the spring bar pin, applying gentle pressure inward: the pin retracts. Simultaneously, pull the strap outward with your other hand. Flip the watch and repeat on the opposite side. Installation of the new strap follows the reverse procedure: position the pin in the lower lug hole and press until you feel the click of engagement.

Are aftermarket straps compatible with the Longines Heritage L2.747.4.52.4?

Yes, completely. All straps with 20mm lug width are compatible with the Longines Heritage L2.747.4.52.4. Artisanal aftermarket straps often surpass the original offering in materials (full-grain alligator, shell cordovan, vegetable-tanned leather) and finishing (embroidered initials, hand-stitching, coloured thread). Always verify that strap thickness is proportionate to the case: for 40mm we recommend a minimum of 4mm.

How long does a leather strap last on the Longines Heritage L2.747.4.52.4?

Lifespan depends on material and usage. Vegetable-tanned alligator resists 5–7 years of daily wear; shell cordovan, thanks to fibre density, can exceed 8–10 years. Pebbled calf lasts 4–6 years. Longevity increases if the strap is removed when not wearing the watch and stored in dry environments. Primary wear factors are continuous flexing at the wrist contact point and prolonged humidity exposure. A superior artisanal strap justifies replacement every 6–8 years with the same pride as a fine garment.

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