Longines · Elegant

Strap for Elegant Collection Automatic 27.2 Pink Gold / Diamond / White

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

Lug width20 mm
Case diameter27 mm
ReferenceL4.378.9.12.0 (aka: L43789120)
FamilyElegant
MovementLongines caliber L595 Hours, Minutes, Seconds | Date
CasePink Gold

Spring bar

Swiss Standard universal spring bars

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

Straps for the Elegant L4.378.9.12.0 (aka: L43789120)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Elegant L4.378.9.12.0 (aka: L43789120), seen from the bench

The Longines Elegant reference L4.378.9.12.0 features the L595 caliber with hour, minute, second and date indications. The movement offers the essential functions for daily use in a three-hand plus date configuration. The Elegant collection represents the classic proposal of the Swiss brand aimed at an audience seeking sobriety and functionality.

Frequently asked questions

What is the lug width of the Longines Elegant L4.378.9.12.0?

The lug width of the Longines Elegant L4.378.9.12.0 is 20mm. This measurement determines compatibility with aftermarket straps. To verify it accurately, measure the exact distance between the inner walls of the two lateral attachments of the case, where the strap engages.

What is the best type of strap for the Longines Elegant L4.378.9.12.0?

For this 27.20mm rose gold timepiece, premium leather straps are the most vocally appropriate choice. Genuine alligator represents the aesthetic pinnacle with noble patina over time; vegetable-tanned calf leather offers immediate softness; shell cordovan guarantees durability and natural lustre. Avoid inexpensive synthetic rubber that clashes with the case's luxury.

How do you change the strap on the Longines Elegant L4.378.9.12.0?

The strap is changed using spring bar attachments that connect the strap to the case. Using a dedicated tool, gently compress the internal spring to slide the bar outward, freeing the strap. Repeat on the other side. Insert the new 20mm strap and allow the bars to snap into place. If uncertain, consult a professional watchmaker.

What is the compatibility of aftermarket straps with the Longines Elegant L4.378.9.12.0?

Any strap with exactly 20mm lug width is compatible with the Longines Elegant L4.378.9.12.0. It is essential that the width is precise: undersized (18mm) or oversized (22mm) straps will be unstable. At milanostraps.it you'll find a complete selection of 20mm straps ready for dispatch and customisable.

How long does a leather strap last on the Longines Elegant L4.378.9.12.0?

The lifespan of a leather strap depends on the material and usage. Alligator and shell cordovan, if properly maintained, last 5-8 years of daily wear thanks to their robust structure and ability to patina without fraying. Vegetable-tanned calf leather lasts an average of 3-5 years. Regular maintenance—cleaning with a soft damp cloth and occasional conditioning treatments—significantly extends longevity.

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