El Primero Chronomaster Open Power Reserve El Primero 36'000 VPH

Replica Zenith made its mark on watchmaking history by presenting the first integrated automatic chronograph movement in 1969. The world’s most accurate mechanical series-made calibre – beating at a frequency of 10 vibrations per second and thus capable of measuring 1/10ths of a second – gave rise to the legendary El Primero chronograph.

ZENITH - OPEN POWER RESERVE EL PRIMERO CHRONOMASTER

The Chronomaster Open unites in a spectacular fashion the most rigorous watchmaking tradition with bold contemporary design. This Replica ZENITH model uncovers the very essence of time and reveals, in the openings on its dial, the 36,000 vibrations of its movement: the legendary El Primero. The aperture invites interest as much by the magic it emanates as by the curiosity it inspires. But make no mistake: the Chronomaster Open is fi rst and foremost an example of technological prowess, a timepiece that is 100% technical and 100% passion.

The Chronomaster Open model leaves no-one indifferent. The open dial – a ZENITH creation – lets one see into the perfectly synchronized pulsations and the magic of the mechanism in what is today unanimously considered as the “best serial movement in the world” for its performance and its chronometric reliability. Its secret lies in its number of vibrations, which is 25% higher than in other movements on the market. Whereas other timepieces make 8 vibrations per second, the El Primero caliber makes 10 in the same time. Over and above the aesthetic success of this open-heart operation – the Open concept is the realization of technical prowess: to make the regulating organ visible, it has been moved to 10 o’clock, on the edge of the movement.

The great watchmaking tradition

Everything here evokes the great tradition of watchmaking: a column-wheel chronograph mechanism; a power reserve indicator; a rhodium-plated plate, circular-graining and chamfered bridges; strokes drawn on the hammers, levers and conveyors; oscillating weight with “Côtes de Genève” guilloché work; revelation of the ZENITH star through skeleton work and tachometric scale on the fl anges that harks back to the chronographs used in the fi rst automobile races. One can only admire the attention to detail.

Aesthetic daring

The Chronomaster Open displays an avant-garde design with highly fi nished features. This aspect is important in the choice of a watch, one of the only pieces of jewelry worn by men, an accessory that identifi es and highlights his personality. ZENITH communicates the image of a highly technical brand that is intended for connoisseurs of high-precision watchmaking.

Variations

Using the design codes of the past to interpret contemporary models, the Chronomaster Open is based on a century and a half of watchmaking expertise. The Open model exists in four different versions: a silver or black sun-burst dial in a steel case or silver sun-burst dial in an 18-carat rose gold case or in a rose gold and steel case. The markers and the three hands for the hours, minutes and small seconds are facetted, rhodium-plated, and hand-set. The central hand of the chronograph, the hand for the 30-minute counter and for the power reserve have a blued fi nish. The curve of the hands that decorate the dial is executed with precise handwork. The Chronomaster Open model belongs to ZENITH’S “Iconic” family.

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