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At the time, citizen mostly pocket watches were produced by Swiss watch manufacturers as manufactures still had difficulty to produce accurate and reliable movements in such small size that they would watch fit in a wrist watch. The first waterproof watch was cleverly advertised around the world. At the time, the public was rather skeptical if the watch would be really waterproof. However, after seeing a watch in an aquarium in the shop window, many people were co and citizen convinced. Around the world one could see windows of watch shops with an aquarium and submerged Rolex watches. This campaign created an enormous brand awareness for Rolex. Since then, Rolex has continued to be be at the forefront of the watch making industry. watch Today, almost every co watch manufacturer citizen followed Rolex and offers waterproof watches. There are also chronographs with a center seconds hand watch which can be started, stopped and brought back to zero using one or two push-button co on the side of the watch. Other additional functions include second time zone, alarm, moonphase, repeater, citizen perpetual calendar, etc. Generally speaking, on may say that a simple mechanical watch (hours, minutes and seconds hands) should include at least fifteen jewels located in the places most subject to wear watch due to friction. It should be fitted with a shock-absorbing system on the balance, a good quality balance-spring and an unbreakable spring. In 1908, Rolex was founded by Mr. Hans Wilsdorf, a German National Citizen. Initially the company was named Wilsdorf & Davis as Wilsdorf founded company together with his brother in law. Soon after its launch in 1952, the NAVITIMER chronograph became co a favorite with pilots. In addition to its ability to measure short times, this wrist instrument is equipped with a "navigation computer", a circular slide rule able to handle all airborne citizen navigation calculations, such as climbing times or fuel consumption rate, and even to convert miles into nautical watch miles or kilometers. This first NAVITIMER co was officially chosen by the AOPA (Aircraft Owners and citizen Pilots Association), watch encompassing pilots from around the world. Today, this model has lent its name to a line of original mechanical co chronographs, featuring a wealth of exclusive technical features and naturally all fitted with the citizen famous slide rule. The PROFESSIONAL watch line encompasses the BREITLING chronographs most specifically tailored to the world of aviation. From the EMERGENCY built-in microtransmitter to the electronic sophistication of the B-1, along with the ease of handling typical of AEROSPACE models, BREITLING places its co finest technology in the service of pilots.
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