ZENITH PORT-ROYAL AUTOMATIC, 1950s

Zenith’s history is a tale of ambition, precision, and endurance spanning over 160 years, making it one of the oldest and most revered Swiss manufactures. From its founding in the heart of the Jura to its current position as a pioneer in high-frequency chronography, Zenith has embodied the tireless pursuit of excellence, a commitment symbolized by its name, the star that marks the highest point in the sky, and by its logo, a five-pointed star that continues to guide its path.

Origins and Foundation
Zenith’s story began in 1865 when a 22-year-old watchmaker named Georges Favre-Jacot decided to establish his workshop in the town of Le Locle, Switzerland, in the heart of the Valle de Joux. Favre-Jacot had a bold vision for the time: to bring together under one roof all the skills necessary for watchmaking, from design to final assembly, creating the first integrated manufacture in the history of watchmaking. This vertical model allowed him to control every stage of the process, ensuring unprecedented quality and precision.

Consolidation and the Zenith Name
The name Zenith first appeared in 1897 when the company registered a highly precise movement that received this name, inspired by the highest point in the sky, symbolizing the brand’s aspiration to reach the top of chronometry. The success of this movement was such that in 1911, the company officially changed its name to Fabrique des Montres Zenith S.A. At the 1900 Paris Universal Exhibition, the Zenith movement won the Grand Prix, an accolade that catapulted the brand’s reputation internationally. To commemorate this achievement, the company released a pocket watch with the prize engraved on the case.

The Era of Precision and Early Innovations
During the early decades of the 20th century, Zenith solidified its reputation as synonymous with precision. In 1913, the brand equipped aviation pioneer Louis Blériot, who praised the accuracy of his watch after his historic crossing of the English Channel. In 1920, Zenith developed the caliber 26x, an eight-day chronometer used in maritime competitions and observatories.

But the true consecration in the field of chronometry arrived in 1950 with the legendary caliber 135. This manual winding movement, designed for precision competitions, became one of the most awarded in history, winning five consecutive prizes at the Neuchâtel Observatory between 1950 and 1954, an unprecedented record. In total, Zenith has accumulated over 2,333 chronometry awards, a testament to its technical mastery over more than a century.

The Birth of the El Primero
The 1960s marked the beginning of a new era for Zenith. In 1959, the company acquired the movement manufacturer Martel Watch Company, a strategic acquisition that provided valuable experience in chronography. Shortly after, management decided to celebrate the brand’s centenary (1965) with the creation of an automatic chronograph, a technical challenge no manufacture had yet achieved. Although the project was delayed, competition intensified when rumors surfaced that a consortium led by Heuer, Breitling, and Hamilton was developing its own automatic chronograph.

On January 10, 1969, Zenith stepped ahead of its competitors and unveiled the El Primero, the world’s first high-frequency automatic chronograph. The name, which means ‘the first’ in Spanish, was a statement of intent. The caliber 3019 PHC movement was revolutionary for several reasons: it operated at a frequency of 36,000 vibrations per hour (5 Hz), the highest in the industry, allowing time to be measured with a precision of a tenth of a second; it featured an integrated automatic winding system (not modular), a column wheel for the chronograph, a 50-hour power reserve, and a thickness of just 6.5 mm. On the other side of the world, Seiko introduced its 6139 caliber that same year, initiating a trilogy of automatic chronographs that would make history.

The first models to be equipped with the El Primero were the references A384, A385 (with fumé dial), and A386 (with three sub-dials of different colors), which quickly became design icons.

The Quartz Crisis and the Silent Hero: Charles Vermot
The success of the El Primero was short-lived. In the early 1970s, the quartz crisis shook the foundations of Swiss mechanical watchmaking. In 1971, Zenith was acquired by the American Zenith Radio Corporation, which saw little future in mechanical movements. In 1975, the new management made the drastic decision to halt all production of mechanical movements and sell off the tools as scrap.

It was then that a master watchmaker from the company, Charles Vermot, decided to take action. Convinced that mechanics had a future, he defied his superiors’ orders and, during several nights, secretly moved tons of machinery, plans, tools, and dies to a small attic on the top floor of the factory, then bricked up the entrance to hide it all. This act of civil disobedience saved the El Primero from extinction.

The Resurgence and Alliance with Rolex
Fate proved Vermot right. In the mid-1980s, interest in mechanical watches resurged. In 1984, under the new ownership of Dixi (who acquired the brand in 1978), the tools hidden by Vermot were rediscovered, and production of the El Primero could resume.

The true consecration came when Rolex, in need of an automatic chronograph movement for its Daytona model, chose the El Primero as its base. From 1988 to 2000, all steel and precious metal Daytona models ran on a movement derived from the El Primero (caliber 4030), which Rolex slightly modified to meet its standards. This endorsement from the world’s most powerful brand gave Zenith new life and incalculable credibility.

The LVMH Era and Contemporary Innovations
In 1999, Zenith was acquired by the French luxury giant LVMH, joining a division that already included TAG Heuer and Hublot. Under the group’s umbrella, the brand began a new phase of investment and technological development.

In 1994, before the acquisition, Zenith had launched the Elite movement, an ultra-thin automatic caliber (ranging from 2.83 mm to 6.20 mm depending on the complication) that was awarded the ‘Best Movement of the Year’ at its presentation at Baselworld. This movement, designed with the help of computer-aided design (CAD), became the basis for the house’s most elegant collections.

In the 21st century, Zenith has continued to push the boundaries of high frequency. In 2003, it introduced the Chronomaster Open, with a partially skeletonized dial to show the heart of the El Primero. In 2017, it launched the Defy collection with the El Primero 21, an automatic chronograph capable of measuring with a precision of hundredths of a second thanks to a dual escapement system operating at 360,000 vibrations per hour (50 Hz) for the chronograph function. That same year, the Defy Zero G collection introduced a gyroscope mechanism that keeps the escapement always in a horizontal position, counteracting the effects of gravity.

Current Collections
Today, Zenith structures its catalog into four fundamental pillars:

– Chronomaster: It is the flagship collection, a direct heir to the original El Primero. It includes the Chronomaster Sport (with a ceramic bezel and tricolor sub-dials) and the Chronomaster Revival (faithful reissues of the A384, A385, and A386 models from 1969), as well as the Chronomaster Original (with 38 mm, inspired by the A386 reference).
– Defy: It is the line of technological avant-garde, with bold octagonal design cases. Here you will find the Defy Skyline (a three-hand watch with a small second hand) and the Defy Extreme (45 mm chronographs with the El Primero 21 and materials such as titanium or carbon fiber).
– Pilot: This collection celebrates Zenith’s aeronautical heritage, which in 1888 registered the word ‘PILOT’ as a brand, being the only manufacture that can carry this name on the dial. The Pilot line includes models like the Pilot Automatic (40 mm with a large date) and the Pilot Big Date Flyback.
– Elite: It is the line of dress watches, elegant and ultra-thin, equipped with the eponymous movement of 1994, offering a sleek silhouette and complications such as moon phases and calendars.

Conclusion
Zenith’s history is a story of an unceasing quest for precision and innovation. From the integrative vision of Georges Favre-Jacot in 1865 to the creation of the El Primero in 1969, Zenith has continuously pushed the boundaries of watchmaking, earning numerous accolades and solidifying its position as a prominent Swiss manufacture.