Good info thanks!! Find More Posts by sig-x. Quote: Originally Posted by Quackers There are several quartz watches too that are chronometers Breitlings, for one. Find More Posts by Onikage. Posts: 48, Quote: Originally Posted by JJL Rolex uses all of these, so for all you 'other' newbies out there like me - I had to look this up because it often confused me. Find More Posts by padi Chronograph, chronometer and Cosmograph — easily explained What is a chronometer?
A chronometer is a watch with very high precision. When tested for their qualities as chronometers, these watches show particularly low rate deviations depending on position and temperature. After successful completion of the test, the watches receive a watch rate certificate and are henceforth permitted to carry the name "chronometer". The origins of the chronometer go back to seafaring in the late Middle Ages.
At that time, precise watches were needed to determine the longitude at sea accurately and thus to be able to maintain orientation. In , John Harrison finally presented a chronometer that made it possible to determine longitudes precisely. What is the definition of a chronograph? A watch is called a chronograph if it has an additional stop function with which time segments can be measured. It is important to differentiate between a chronograph and a chronometer, as a "chronometer" is only the quality label for the accuracy of a timepiece, but does not have to have a stop function.
In , it was Louis Moinet who developed the first approved chronograph. Back then he called this instrument "Compteur de Tierces" thirds timer. Only a few years later, in , watchmaker Nicolas Mathieu Rieussec presented his invention for short-time measurements named "Chronograph".
Montblanc still pays tribute to Rieussec and his invention today with its Nicolas Rieussec collektion. Nowadays, chronographs can often be recognised by their distinctive dials with three totalisers in a tri-compax arrangement , for example at 3, 6 and 9 o'clock, and the two pushers to the right and left side of the watch crown.
Models such as the Navitimer or the Chronomat celebrated huge success in aviation shortly after their launch and quickly became an essential tool for pilots.
Additional features such as the tachymeter scale on the bezel enabled them to perform complex and vital calculations quickly and easily, even during flights. What does the term Cosmograph mean? The term "Cosmograph" is a word created by Rolex , which first appeared in the s to describe a watch with a moon phase and calendar function and is now used for Daytona Chronographs.
The Swiss watch manufacturer has had an essential influence on the history of horology and with the Cosmograph has created a model that differs from all other chronographs in more than just its name. A chronograph is a watch with a built-in stopwatch feature. Timepieces that incorporate a chronograph mechanism are usually characterised by one or more subdials and one or two pushers in addition to the crown. A chronograph allows its wearer to easily and accurately measure short intervals of time.
A Cosmograph is a term that was coined and registered by Rolex in This feature is referred to as a complication.
Chronograph watches typically have two or three subdials that display the hours, minutes, and seconds. If a watch has a chronograph, it will usually feature a return to zero button, or pusher, on the side of the watchcase. The top pusher will start the chronograph, while the bottom pusher will stop the chronograph. If a watch is referred to as a chronometer , it has passed intense precision tests over a day period and has obtained an official rate certificate from the COSC , which is the Official Swiss Chronometer Testing Institute.
These tests measure the movement of the watch towards a set of accuracy. If a watch is referred to as a chronometer, it is a superior timekeeper and is very accurate. A watch can be both a chronometer and have a chronograph function.
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