Past, present and future. El Primero has been flowing through the veins of Zenith for 50 years. The history of this high-frequency star, born in 1969, continues today and tomorrow, with the iconic CHRONOMASTER El Primero and the futuristic Defy. To celebrate the unique destiny of El Primero – the world's first integrated and most accurate automatic chronograph –, Zenith invites you on a journey through time. The anniversary set contains three El Primero models retracing the technical and aesthetic evolution of this precision legend. Presented in a box mingling technology with tradition, this collector’s trio with ‘signature’ counters panders to every desire: vintage, classic or modern. Meanwhile, a still-empty fourth cushion sits ready to welcome the next achievement of Zenith in the universe of very high frequency: 1/1000th of a second!


Innovation benchmark

Since January 10th 1969, the date when the famous El Primero (‘the first’ in Spanish) chronograph was presented, Zenith has been brightly glowing in the firmament of high frequency. Continuously enriched with new technical and aesthetic advances, the undeniable icon of precision has been available for half a century in the Manufacture's collections. Flashback to the late 1960s, marked by a horological revolution: the birth of the El Primero, the first ever automatic chronograph. Its innovative features – a rate of 36,000 vibrations per hour, integrated column-wheel construction, a central rotor mounted on ball bearings and over 50 hours of operating autonomy (a real feat for such a high frequency) – made it the most accurate chronograph in the world and the only one capable of measuring short times to 1/10th of a second. In addition to these revolutionary performances, El Primero established new visual codes, with a range of contrasting colours that enhanced the readability of the counters: light grey for seconds, blue for minutes and anthracite for hours. This combination would quickly become an emblem of the Maison.


Original version

While El Primero has constantly evolved since its invention, inspiring new creations to the point of becoming an archetypal model prized by connoisseurs, Zenith had never yet offered a reissue faithful to the original model. This has now been done, since the anniversary boxed set, in a 50-piece limited edition, includes in its first compartment a perfect reiteration of the 1969 El Primero chronograph. A historical first that endows this vintage watch with a special aura and potent symbolism. The 38 mm steel case, curved glass with magnifying effect, tricolour counters, tachymeter scale, font, the shapes of the hands and hour-markers, as well as the leather strap: all the original codes are resolutely present. Likewise, the shape of the lugs and mushroom pushers are exactly reproduced on this pure "revival" watch. To give a new lease on life to the spirit and the original attributes of its illustrious predecessor, Zenith's engineers and designers carried out a reverse engineering process: an authentic copy of the brand's museum was entirely laser-scanned to restore each component. The only liberties that have been taken are the fact that the initially solid back now reveals the movement without hindrance and that the crown logo has been updated. As for the ‘engine’, it’s the current version of the El Primero column-wheel chronograph movement, beating at a rate of 36,000 vibrations per hour and delivering 1/10th of a second precision as well as a 50-hour power reserve. Like the original, it displays the hours, minutes and small seconds, chronograph, tachymeter and date functions, the latter appearing between 4 and 5 o’clock.



A direct descendant of El Primero, the Zenith CHRONOMASTER is its most emblematic contemporary embodiment. A CHRONOMASTER is recognisable at first sight. Its imposing stature, iconic design and high-frequency mechanism are embedded in the Manufacture's DNA. Therefore, to celebrate the legendary model from which it originated, the second watch in the case is a CHRONOMASTER, equipped with a new-generation El Primero engine and a new black ceramic bezel. Renamed El Primero 3600, its movement is presented in an optimised version, an update conducted in accordance with the architecture and proven performance of the legendary El Primero. This high-frequency calibre, beating at 36,000 vibrations per hour, achieves the feat of accurately measuring one tenth of a second and offering direct readings on the dial and bezel. In other words, the chronograph hand makes one dial turn in 10 seconds, indicating at each jump the tenth of a second on a scale graduated from 1 to 100. With this 2.0 version, the original construction of the El Primero chronograph, consisting of a column wheel and a lever-operated lateral clutch, is visually highlighted and redesigned to enhance its reliability and precision. The most obvious results are the integration of a stop-seconds device for time-setting and a power reserve increased to 60 hours. In addition to its maximised assets, the new CHRONOMASTER has a sportier and more modern look than its contemporaries, featuring a 42 mm steel case topped by a graduated black ceramic bezel, a star-shaped oscillating weight and a rubber strap with contrasting stitching.


Futuristic element

The last element of this trilogy, the Defy El Primero 21 chronograph, heralds the watchmaking of the future. A future that holds exceptional achievements in store, as suggested by the fourth cushion of the case, deliberately left empty to accommodate Zenith's next feats in the field of extreme high frequency. But for now, it's time for the present, with the Defy El Primero, the ultra-modern embodiment of the legendary El Primero. Beating inside its imposing 44 mm titanium case is a revolutionary mechanical movement. Oscillating at a frequency of 360,000 vibrations per hour (50 Hz), ten times higher than its predecessor, it measures and displays one hundredth of a second on a scale from 1 to 100. Its exclusive dynamic signature – the lightning-quick hand making a full turn of the dial in one second – reflects the exceptional precision and performance of this engine stemming from modern engineering with two independent "gearboxes" on board: one for the time and the other for the chronograph. Its skeleton dial features three solid counters in the original colours – the common denominator of this "tribute" edition – and its contemporary lines, formed by a large fluted crown, flat pushpieces and short lugs, merge seamlessly onto the wrist by means of a black rubber strap covered with black alligator leather.