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Zenith Grande ChronoMaster XXT Tourbillon El Primero Concept

Posted by wristwatch on July 18, 2007

The El Primero movement? An undisputed technical feat, acclaimed as the world’s only chronograph with a heart beating at 36,000 vibrations per hour, thus enabling precision measurements to within the nearest tenth of a second.The Tourbillon? The world’s greatest horological complication, aimed at compensating for the effects of gravity by placing the escapement within a revolving carriage.

The waking dream of a brilliant mechanical specialist? To associate both concepts, thus defying the laws of cinetics. Logically speaking, since one draws energy from the dynamism of the other, the speed of the calibre should be significantly reduced. Nonetheless…

After three years of research and development, the design-engineers and master-watchmakers of the Manufacture ZENITH have achieved the impossible: maintaining speed while preserving enough power to drive the tourbillon, and thus providing the calibre with a stable balance of energies. The Grande Chronomaster XXT Tourbillon is born.

And because one accomplishment often leads to another, a second patent has been filed right behind the first: the calendar disc is inserted between the bridge and the tourbillon carriage, turning in the opposite direction. That means that while the latter revolves in 60 seconds, the date changes at midnight in the opposite direction. A double “propeller ” embodying a new kind of watchmaking genetics…

Symbolising accelerated development, the “tourbillon” or whirlwind concept represents an extraordinary intervention in the customary cadence of things. At ZENITH; the tourbillon is upward-moving and represents the spiral of life, of accelerated progress; it disrupts the established equilibrium of linear time and sweeps us towards breaking with such patterns. That is exactly why, like a face painted by Piaccso, the design of the Grande Chronomaster XXT Tourbillon is resolutely asymmetrical: the hour axis is not centered, and the hour-markers feature a crescendo movement towards the Tourbillon carriage which is set slightly to the left at 11 o’clock. The approach is resolutely modern In the white gold and black dial version, while the pink gold and guilloché dial model is in keeping with the noblest watchmaking traditions.

The engineering of this new 4005 movement, composed of 310 parts, is a source of endless fascination for the Cartesian mind. Meanwhile, the heart is immediately won over by the lyrical beauty of design at liberty. Through this virtuoso blend of technique and emotion, the Manufacture ZENITH has created its finest work ever.

* NEW El Primero 4005
* Automatic chronograph movement with tourbillon
* 15 1/2“` caliber. Diameter : 35 mm. Height : 7.55 mm. 319 components.
* 36’000 vibrations per hour
* Power reserve over 50 hours
* 35 jewels
* Measures short time intervals to a 10th of a second
* Automatic winding in both directions
* Central rotor on ball bearings
* 22-carat rose gold guilloché oscillating weight with “Grain d’Orge” pattern, or 22-carat white gold with “Côtes de Genève” pattern
* Hour and minutes in the center
* Date indication positioned around the carriage
* Tourbillon:
* •The carriage is positioned at 11 o’clock
* •The carriage makes 1 turn per minute
* Center seconds-hand
* 30-minute counter at 3 o’clock
* 12-hour counter at 6 o’clock
* 18-carat rose or white gold
* 18-carat rose or white gold ZENITH push buttons and crown
* Diameter : 45 mm
* Diameter opening : 35 mm
* Curved sapphire glass with anti-reflection treatment on both sides
* Transparent sapphire case back
* Water-resistance up to 30 meters
* Gold dial
* Guilloché silver or plain black dial
* 18-carat rose or white gold hand-mounted applique indexes
* Three dimensional indexes in progressive size
* 18-carat rose or white gold faceted hands
* Black alligator leather strap, hand-stitched tone-in-tone, lined with silky Alzavel calfskin
* 18-carat rose or white gold ChronoMaster triple folding buckle stamped with the historical ZENITH star on the cap



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