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Briefly: With Zenith El Primero Striking 10 on his wrist Explorer Jean-Louis Etienne is flying aboard a balloon to North Pole to provide measurements of the Earth's magnetic field and the amount of ?CO2 in an area free from emissionsj l etienne in red parkaPolar traveller, Jean-Louis Etienne took off at 06 :09 on Monday April 5 from Spitsbergen, Norway, aboard a giant Rozi��re hybrid balloon kept aloft both by helium and hot air. His aim is the first solitary overflight of the North Pole, which he is expected to reach within three days, before heading for Alaska.Etienne's exploit will provide measurements of the Earth's magnetic field and the amount of carbon dioxide gas (CO2) in an area free from emissions. The first undisputed attainment of the North Pole was by Roald Amundsen and Umberto Nobile, who flew over it on board the dirigible, Norge, on May 12, 1926.Amundsen, who had earlier become the first to reach the South Pole, was thus the first person to have crossed the entire face of the Earth. On both expeditions, Amundsen wore a watch provided by the Swiss manufacturers, Zenith.Etienne faces a 3,500km journey from Spitsbergen across the North Pole to the shores of Alaska. Spitsbergen is Norway's most northern Arctic territory, but there's still another 1,300km to the Pole and 2,200 more to Alaska. By finding favourable winds at different altitude, the balloon's pilot hopes to maintain the right course.zenith striking 10Completed in 1969, the El Primero movement ranks among the greatest achievements of Swiss watchmaking. Today it is still one of the most advanced and precise mechanical calibres in production. It’s secret lies in the rate of its balance wheel. While conventional balances beat eight times a second at the most, El Primero's vibrates 10 times in the same period. The ticking of a watch denotes the frequency of its balance, and the higher its frequency, the more exactly you can measure time. The Zenith factory has proved the undeviating regularity of its watches ever since it was founded in 1865, winning a number of prizes at observatory trials and producing movements that could withstand the worst conditions. Today this strength of spirit is represented by the El Primero movement with its rock-steady frequency of 10 vibrations a second.The El Primero Striking 10th marks the Manufacture Zenith's return to the technical values that won the brand its reputation. The El Primero calibre was the first production movement with a balance frequency of 10 semi-oscillations a second. It’s advanced design measures time to the highest precision by mechanical means. While most other mechanical movements reach a frequency of eight vibrations a second, this model indicates the tenths of a second at the exact frequency of its remarkable movement. Jean-Louis Etienne, physician and explorer wears watch number 001 of this limited edition.

The Benchmark for Accuracy - The First Automatic El Primero Integrated Chronograph with 1/10th of a Second Display The legendary El Primero movement developed by the Manufacture Zenith and first introduced on January 10, 1969 has proved a perpetual source of fascination. While all movement manufacturers were capable of producing automatic movements for classic watches, none had thus far ventured to develop such a system for a chronograph movement. It is historically acknowledged as the "first chronograph calibre with automatic winding by an oscillating weight pivoting on a centrally-placed ball bearing mechanism". Making an El Primero movement involves: a symbolic nine months of work during which 20 watchmakers play successive roles in developing and crafting this movement no less than 5,500 operations. 50 milling operations of various dimensions on the dial side. 77 other milling operations on the bridge side - 5 and 50 operations for each part - 18 different metals in its classic version. The heart of the El Primero beats at a rate of 36,000 vibrations per hour or in other words 864,000 a day, meaning 315,360,000 beats per year. One vibration corresponds to the position of the lever as it swings to and fro, making the alternating "tick" and "tock" sounds. As there are 3,600 seconds in an hour (60 seconds times 60 minutes), and since El Primero beats at a frequency of 36,000 vibrations per hour, the hands actually thus make 10 jumps per second, thereby marking off tenths of a second. Enhanced precision and readability through jumping seconds The Jumping Seconds chronograph is distinguished by a chronograph hand completing its rotation in just 10 seconds and thereby considerably improving the 1/10th of a second read-off. This significant new feature is backed by six-times larger divisions on the outer dial ring (10 seconds instead of 60) enabling totally accurate readings to within 1/10th of second. One particularly important feature of this model lies in the chronograph stop function. When it is stopped, the hand-locking system brings the hand to an extremely precise halt, since the brake-lever positions the hand between two of the 100 teeth on the chronograph wheel, thereby further enhancing the precision of the 1/10th of a second read-off. The original El Primero movement sweeps around the dial in 60 seconds in tiny 1/10th of a second jumps, meaning the chronograph hand performs 600 jumps a minute. The ultra-fast stopping and restarting of this large chronograph hand 10 times a second calls for a huge amount of energy. The watch functions had to be significantly improved and optimised to enable this energy-consuming acceleration. Seeking to reduce the energy required naturally entailed making the movement wheels as light as possible, which is why some of them are in silicon �C a material three and a half times lighter than its traditional counterparts. An attractive new face Driven by the El Primero 4052 B automatic calibre, the new El Primero Jumping Seconds chronograph comes in a choice of 18-carat rose gold or stainless steel for its 42mm case that is water-resistant to 100 meters and fitted with a transparent sapphire crystal on either side. The silver sunray-brushed dial features circular satin-brushed zones for the rose gold version. Both the stainless steel model and the gold model feature three counters. On the stainless steel version, these come in subtle shades of blue and grey. The faceted hands and hour-markers coated with Superluminova are rhodium-plated, or gold-plated on the rose gold models. The distinctive 1/10th of a second indication is clearly marked off by the dedicated chronograph hand. This elegantly sophisticated model is fitted with a choice of rubber-lined black or brown alligator leather strap, secured to the wrist by a pin buckle in stainless steel or 18kr rose gold, or by a stainless steel bracelet with triple folding clasp. Vividly embodying a revolutionary technical enhancement that is reflected in its stand-out design, the El Primero Jumping Seconds chronograph takes high-precision timing read-off to a whole new level.