Longines · Heritage

Strap for BelleArti 19 Quartz Stainless Steel

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

Lug width12 mm
Case diameter19 mm
ReferenceL2.194.4.73.2 (aka: L21944732)
FamilyHeritage
MovementLongines caliber L178 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 L2.194.4.73.2 (aka: L21944732), seen from the bench

The Longines Heritage L2.194.4.73.2 is a 19mm stainless steel watch featuring the manual Longines caliber L178 movement with hours, minutes and small seconds. It represents a miniaturist timepiece rooted in 1920s Swiss watchmaking tradition with Art Deco proportions. The watch has a 12mm lug width, a defining characteristic that requires precise strap compatibility to maintain visual balance between case and strap.

Frequently asked questions

What is the lug width of the Longines Heritage L2.194.4.73.2?

The lug width of the Longines Heritage L2.194.4.73.2 is 12mm. This measurement determines strap compatibility: a 12mm strap will fit correctly into the watch lugs without forcing or leaving gaps. To verify the measurement, place a ruler inside the lug from one wall to the other at the attachment zone.

Which strap is most suitable for the Longines Heritage L2.194.4.73.2?

For this 19mm model, we recommend an American alligator strap or vegetable-tanned calf leather, which preserve the understated elegance of the Art Deco era. Alligator offers natural texture and light-reactive movement; calf develops patina over time. For sporting contexts, a nylon ripstop NATO strap provides practicality without aesthetic compromise.

How do I change the strap on the Longines Heritage L2.194.4.73.2?

Use a spring bar tool (lever for springs) to remove the elastic spring fastening the strap to the lugs. Position the tool's tip in the small hole located beneath the lug, apply light pressure to compress the spring, and slide the strap outward. To install the new strap, insert one end into the spring first, then press the other end into the correct position until the click-lock engages.

Can I use an aftermarket strap from a different manufacturer on my Longines Heritage L2.194.4.73.2?

Yes, provided the strap is specifically manufactured for 12mm lugs. Artisanal quality straps from specialised craftspeople often offer superior compatibility and durability compared to generic aftermarket brand straps. Always verify that the strap ends are cut for 12mm lugs, neither wider nor narrower.

What is the average lifespan of a leather strap on the Longines Heritage L2.194.4.73.2?

A quality leather strap (alligator or vegetable-tanned calf) lasts 3-5 years with ordinary maintenance and regular use. Lifespan depends on environmental factors (humidity, solar exposure), usage frequency and care: avoid excessive water contact with leather, apply protective balms every 6-12 months and store the strap in a dry environment. The 18-month warranty offered by Casati Milano covers manufacturing defects.

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