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Start the chronograph when the car passes a predetermined starting line or marker A, and stop the chronograph when the car passes the next line or marker B, 1 km (or mile) away. Let's get a little more "indepth" just skip if you know or simply aren't interested.įor example, we want to know the speed of a moving car. Here's how.ġ) Start the chronograph at a starting line or marker.Ģ) Stop the chronograph at the next kilometer or mile marker.ģ) The value on the scale at which the second hand is pointing indicates the speed in km/hour or miles/hour depending on the unit of distance used. While the scale markings may look complicated at first glance to the uninitiated, reading the tachymeter is really easy. You can also use it to measure a production process in units/hour. It tells you the traveling speed over a fixed distance in km/hour or miles/hour. The flyback allows a reading and a quick reset, a counterclockwise 'flyback', for the next measurement to start at zero. Ordinarily the sweep second hand is stopped to record the time and started again at that spot on the dial, or reset by spinning the second hand all the way to zero again, clockwise. Less simple chronographs use additional complications and can have multiple independent hands to measure seconds, minutes, hours and even tenths of a secondĬhronographs can be extremely complicated devices, but they all have the basic function of telling time, as they are watches, and of displaying elapsed time.įlyback chronographs have a timing hand that can be rapidly reset, or 'flyback', to zero. A basic chronograph has an independent sweep second hand it can be started, stopped, and returned to zero by successive pressure on the stem. By the 1920s, Cyma had followed a growing trend to standardise watch part manufacture, but typical of the company, it wasn’t enough to just produce parts that were interchangeable, they had to be precision made to ensure long term accuracy.Ī chronograph is a specific type of watch that is used as a stopwatch combined with a display watch. Even basic models were very accurate and many were consequently sold as officially tested chronometers. The quality of the product allowed Tavannes/Cyma to develop into one of the largest Swiss watch manufacturers by 1910. Sandoz used the most modern of manufacturing processes and produced very high quality time-pieces, trademarked as Tavannes, Cyma and Cyma Tavannes. Soon after this move Sandoz formed a developed a business relationship with the Schwob brothers and Cyma was officially registered in 1903. However Sandoz moved to Tavannes in 1891, just North of Biel where he focused on the manufacture of highly complex repeaters and chronographs. At about the same time 1871, Henri Sandoz established Sandoz & Cie in Le Locle. Cyma can trace its routes back to the Schwob brothers Joseph and Theodore, who initially established cyma in 1862 as a watch manufacturer that assembled watches from components derived from multiple Swiss sources. Even the name Cyma, derived from the French cime for top or summit indicated the aims of the company, that of reaching the pinnacle of of accuracy. The History of Cyma Tavannes Watch CompanyĬyma is a watch brand that has long been associated with accuracy. Military Pilots TELEMETRE (tachymeter) DialĮarly Valjoux 23 Column wheel Chronograph CYMA / Tavannes Ref.400l